[Buildroot] [RFCv2 0/1] gobject-introspection: new series

[Buildroot] [RFCv2 0/1] gobject-introspection: new series

[Adam Duskett]

After a lot more pounding away at the keyboard, I am now ready to release
version 2 of the gobject-introspection series patch.

This new series has the following upgrades:
  - It now works on arm.  (More on that later)
  - Gstreamer1 can now use it.
  - General makefile cleanups.
  - New patches that make cross-compiling a bit nicer (thanks, yocto!)

To start:

I have tested this with a cortex-a9/gcc7.3 and of course glibc.
So far GStreamer can now compile, which means that everything as far
as I can tell is setup correctly to give this thing a genuine shot finally
at being put into mainline Buildroot!

What doesn't work:
For some reason, x86_64/i7 does not work. Qemu segfaults. I have a
suspicion that this is why Yocto does pre-linking, but I am not 100%
sure.

What I could use help with:

- Obviously automated testing. I had a conversation in IRC with Yann, and he
said that perhaps just merging it in now with only a small set of architectures
might be an excellent way to go. 

- Package updates: I will get around to updating python-gobject as it's needed
  for GStreamer-python (the entire reason I started this venture)

- Comments on the patches themselves would also be appreciated!.

Thanks!

Adam

Adam Duskett (3):
  qemu: add BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS
  gobject-introspection: new package
  gstreamer1: support gobject-introspection

 package/gstreamer1/gstreamer1/gstreamer1.mk | 5 +++++
 1 file changed, 5 insertions(+)

-- 
2.14.3

[Buildroot] [RFCv2 1/3] qemu: add BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS

[Adam Duskett]

Match the style used with other packages such as valgrind.

Signed-off-by: Adam Duskett <aduskett@gmail.com>
---
 package/qemu/Config.in.host | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/package/qemu/Config.in.host b/package/qemu/Config.in.host
index 71f38ef41f..78fe54a85c 100644
--- a/package/qemu/Config.in.host
+++ b/package/qemu/Config.in.host
@@ -1,15 +1,20 @@
-config BR2_PACKAGE_HOST_QEMU
-	bool "host qemu"
-	depends on BR2_arm       || BR2_armeb       || BR2_aarch64      || \
+config BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS
+	bool
+	default y if BR2_arm || BR2_armeb       || BR2_aarch64      || \
 		BR2_i386         || BR2_m68k        || BR2_microblazeel || \
 		BR2_microblazebe || BR2_mips        || BR2_mipsel       || \
 		BR2_mips64       || BR2_mips64el    || BR2_powerpc      || \
 		BR2_powerpc64    || BR2_powerpc64le || BR2_sh           || \
 		BR2_sparc        || BR2_x86_64
+
+config BR2_PACKAGE_HOST_QEMU
+	bool "host qemu"
+	depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS
 	select BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE \
 		if !BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE
 	help
-	  QEMU is a generic and open source machine emulator and virtualizer.
+	  QEMU is a generic and open source machine emulator and
+	  virtualizer.
 
 	  This option builds an emulator for your selected architecture.
 
-- 
2.14.3

[Buildroot] [RFCv2 1/3] qemu: add BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS

[Yann E. MORIN]

Adam, All,

On 2018-02-07 16:23 -0500, Adam Duskett spake thusly:
> Match the style used with other packages such as valgrind.
> 
> Signed-off-by: Adam Duskett <aduskett@gmail.com>

Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

However, small comment below...

> ---
>  package/qemu/Config.in.host | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/package/qemu/Config.in.host b/package/qemu/Config.in.host
> index 71f38ef41f..78fe54a85c 100644
> --- a/package/qemu/Config.in.host
> +++ b/package/qemu/Config.in.host
> @@ -1,15 +1,20 @@
> -config BR2_PACKAGE_HOST_QEMU
> -	bool "host qemu"
> -	depends on BR2_arm       || BR2_armeb       || BR2_aarch64      || \
> +config BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS
> +	bool
> +	default y if BR2_arm || BR2_armeb       || BR2_aarch64      || \
>  		BR2_i386         || BR2_m68k        || BR2_microblazeel || \
>  		BR2_microblazebe || BR2_mips        || BR2_mipsel       || \
>  		BR2_mips64       || BR2_mips64el    || BR2_powerpc      || \
>  		BR2_powerpc64    || BR2_powerpc64le || BR2_sh           || \
>  		BR2_sparc        || BR2_x86_64

This would become more readable if we were to write:

    default y if BR2_arm || BR2_armeb
    default y if BR2_aarch64
    default y if BR2_i386 || BR2_x86_64
    etc...

But of course, not part of this patch. ;-)

> +config BR2_PACKAGE_HOST_QEMU
> +	bool "host qemu"
> +	depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS
>  	select BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE \
>  		if !BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE
>  	help
> -	  QEMU is a generic and open source machine emulator and virtualizer.
> +	  QEMU is a generic and open source machine emulator and
> +	  virtualizer.

Spurious wrapping. Not very important...

Regards,
Yann E. MORIN.

>  	  This option builds an emulator for your selected architecture.
>  
> -- 
> 2.14.3
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot

-- 
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 223 225 172 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
'------------------------------^-------^------------------^--------------------'

[Buildroot] [RFCv2 1/3] qemu: add BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS

[Thomas Petazzoni]

Hello,

On Wed,  7 Feb 2018 16:23:53 -0500, Adam Duskett wrote:
> Match the style used with other packages such as valgrind.
> 
> Signed-off-by: Adam Duskett <aduskett@gmail.com>
> ---
>  package/qemu/Config.in.host | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)

Applied to next after dropping the spurious/unrelated change in the
Config.in help text, as noticed by Yann. Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

[Buildroot] [RFCv2 2/3] gobject-introspection: new package

[Adam Duskett]

GObject introspection is a middleware layer between C
libraries (using GObject) and language bindings. The C library
can be scanned at compile time and generate a metadata file,
in addition to the actual native C library. Then at runtime,
language bindings can read this metadata and automatically
provide bindings to call into the C library.

Signed-off-by: Adam Duskett <aduskett@gmail.com>
---
 DEVELOPERS                                         |   1 +
 ...ncomplete-upstream-attempt-at-cross-compi.patch |  50 +++
 ...c-add-host-gi-gi-cross-wrapper-gi-ldd-wra.patch | 203 ++++++++++++
 ...3-giscanner-add-use-binary-wrapper-option.patch |  52 +++
 ...04-giscanner-add-a-use-ldd-wrapper-option.patch |  48 +++
 ...config-paths-with-PKG_CONFIG_SYSROOT_DIR-.patch |  97 ++++++
 .../0006-add-PYTHON_INCLUDES-override.patch        |  39 +++
 ...07-giscanner-add-a-lib-dirs-envvar-option.patch |  73 +++++
 .../gobject-introspection/0008-add-Float128.patch  |  28 ++
 package/gobject-introspection/Config.in            |  34 ++
 package/gobject-introspection/cross-ldd            | 362 +++++++++++++++++++++
 package/gobject-introspection/g-ir-compiler.in     |   2 +
 .../g-ir-scanner-lddwrapper.in                     |   2 +
 .../g-ir-scanner-qemuwrapper.in                    |  10 +
 package/gobject-introspection/g-ir-scanner.in      |   3 +
 .../gobject-introspection.hash                     |   4 +
 .../gobject-introspection/gobject-introspection.mk |  89 +++++
 17 files changed, 1097 insertions(+)
 create mode 100644 package/gobject-introspection/0001-Revert-an-incomplete-upstream-attempt-at-cross-compi.patch
 create mode 100644 package/gobject-introspection/0002-configure.ac-add-host-gi-gi-cross-wrapper-gi-ldd-wra.patch
 create mode 100644 package/gobject-introspection/0003-giscanner-add-use-binary-wrapper-option.patch
 create mode 100644 package/gobject-introspection/0004-giscanner-add-a-use-ldd-wrapper-option.patch
 create mode 100644 package/gobject-introspection/0005-Prefix-pkg-config-paths-with-PKG_CONFIG_SYSROOT_DIR-.patch
 create mode 100644 package/gobject-introspection/0006-add-PYTHON_INCLUDES-override.patch
 create mode 100644 package/gobject-introspection/0007-giscanner-add-a-lib-dirs-envvar-option.patch
 create mode 100644 package/gobject-introspection/0008-add-Float128.patch
 create mode 100644 package/gobject-introspection/Config.in
 create mode 100644 package/gobject-introspection/cross-ldd
 create mode 100644 package/gobject-introspection/g-ir-compiler.in
 create mode 100644 package/gobject-introspection/g-ir-scanner-lddwrapper.in
 create mode 100644 package/gobject-introspection/g-ir-scanner-qemuwrapper.in
 create mode 100644 package/gobject-introspection/g-ir-scanner.in
 create mode 100644 package/gobject-introspection/gobject-introspection.hash
 create mode 100644 package/gobject-introspection/gobject-introspection.mk

diff --git a/DEVELOPERS b/DEVELOPERS
index d0605af387..aaa412da4e 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -34,6 +34,7 @@ F:	package/audit/
 F:	package/busybox/
 F:	package/checkpolicy/
 F:	package/cppdb/
+F:	package/gobject-introspection/
 F:	package/gstreamer1/gstreamer1/
 F:	package/gstreamer1/gstreamer1-mm/
 F:	package/gstreamer1/gst1-plugins-bad/
diff --git a/package/gobject-introspection/0001-Revert-an-incomplete-upstream-attempt-at-cross-compi.patch b/package/gobject-introspection/0001-Revert-an-incomplete-upstream-attempt-at-cross-compi.patch
new file mode 100644
index 0000000000..86ba666d24
--- /dev/null
+++ b/package/gobject-introspection/0001-Revert-an-incomplete-upstream-attempt-at-cross-compi.patch
@@ -0,0 +1,50 @@
+From 3a9d1e5ee0aae56fafec0beba2014c19e4ff310c Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Wed, 23 Mar 2016 17:07:28 +0200
+Subject: [PATCH] Revert an incomplete upstream attempt at cross-compile support
+
+Upstream-Status: Pending
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+Signed-off-by: Adam Duskett <aduskett@gmail.com>
+---
+ common.mk                | 4 ----
+ giscanner/gdumpparser.py | 6 ------
+ 2 files changed, 10 deletions(-)
+
+diff --git a/common.mk b/common.mk
+index b778f7a..e26c637 100644
+--- a/common.mk
++++ b/common.mk
+@@ -24,12 +24,8 @@ INTROSPECTION_SCANNER_ARGS = \
+     --add-include-path=$(top_builddir) \
+     --add-include-path=$(top_builddir)/gir
+ 
+-# GI_CROSS_LAUNCHER is the command to use for executing g-ir-compiler.
+-# Normally will be undefined but can be set (e.g. to wine or qemu)
+-# when cross-compiling
+ INTROSPECTION_COMPILER = \
+     env PATH=".libs:$(PATH)" \
+-        $(GI_CROSS_LAUNCHER) \
+         $(top_builddir)/g-ir-compiler$(EXEEXT)
+ 
+ INTROSPECTION_COMPILER_ARGS = \
+diff --git a/giscanner/gdumpparser.py b/giscanner/gdumpparser.py
+index 1134f33..9bdc2bc 100644
+--- a/giscanner/gdumpparser.py
++++ b/giscanner/gdumpparser.py
+@@ -162,12 +162,6 @@ blob containing data gleaned from GObject's primitive introspection."""
+         out_path = os.path.join(self._binary.tmpdir, 'dump.xml')
+ 
+         args = []
+-
+-        # Prepend the launcher command and arguments, if defined
+-        launcher = os.environ.get('GI_CROSS_LAUNCHER')
+-        if launcher:
+-            args.extend(launcher.split())
+-
+         args.extend(self._binary.args)
+         args.append('--introspect-dump=%s,%s' % (in_path, out_path))
+ 
+-- 
+2.7.0
+
diff --git a/package/gobject-introspection/0002-configure.ac-add-host-gi-gi-cross-wrapper-gi-ldd-wra.patch b/package/gobject-introspection/0002-configure.ac-add-host-gi-gi-cross-wrapper-gi-ldd-wra.patch
new file mode 100644
index 0000000000..ef57c67de7
--- /dev/null
+++ b/package/gobject-introspection/0002-configure.ac-add-host-gi-gi-cross-wrapper-gi-ldd-wra.patch
@@ -0,0 +1,203 @@
+From b1503fe2693d602b3e24e4b832dc0934960d5d22 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Mon, 19 Oct 2015 18:29:21 +0300
+Subject: [PATCH] configure.ac: add host-gi, gi-cross-wrapper, gi-ldd-wrapper and introspection-data options
+
+With the first option, gobject-introspection tools (g-ir-doc-tool and g-ir-scanner)
+that are already installed in the host system will be used for building the source tree.
+
+With the second option, g-ir-scanner will be instructed to use an executable
+wrapper to run binaries it's producing, and g-ir-compiler will be run
+through the same wrapper (host system's g-ir-compiler cannot be used because
+it's producing architecture-specific output).
+
+With the third option, giscanner will be instructed to use a special ldd
+command instead of system's ldd (which does not work when the binary to inspect
+is compiled for a different architecture).
+
+With the fourth option, it is possible to disable building of introspection data
+(.gir and .typelib files), which may be difficult or impossible in cross-compilation
+environments, because of lack of emulation (or native hardware) for the target architecture
+on which the target binaries can be run.
+
+These options are useful when cross-compiling for a different target architecture.
+
+Upstream-Status: Pending [review on oe-core list]
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+Signed-off-by: Adam Duskett <aduskett@gmail.com>
+---
+ Makefile.am       |  2 ++
+ common.mk         | 39 +++++++++++++++++++++++++++++++++++++++
+ configure.ac      | 42 ++++++++++++++++++++++++++++++++++++++++++
+ tests/Makefile.am |  5 ++++-
+ 4 files changed, 87 insertions(+), 1 deletion(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index b080a89..ce8d29b 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -21,7 +21,9 @@ include Makefile-cmph.am
+ include Makefile-girepository.am
+ include Makefile-giscanner.am
+ include Makefile-examples.am
++if BUILD_INTROSPECTION_DATA
+ include Makefile-gir.am
++endif
+ include Makefile-tools.am
+ include Makefile-msvcproj.am
+ 
+diff --git a/common.mk b/common.mk
+index e26c637..9f3a65f 100644
+--- a/common.mk
++++ b/common.mk
+@@ -6,6 +6,15 @@
+ # module itself.
+ #
+ 
++if USE_HOST_GI
++INTROSPECTION_SCANNER = \
++    env PATH="$(PATH)" \
++        LPATH=.libs \
++        CC="$(CC)" \
++        PYTHONPATH=$(top_builddir):$(top_srcdir) \
++        UNINSTALLED_INTROSPECTION_BUILDDIR=$(top_builddir) \
++        g-ir-scanner
++else
+ INTROSPECTION_SCANNER = \
+     env PATH=".libs:$(PATH)" \
+         LPATH=.libs \
+@@ -14,9 +23,24 @@ INTROSPECTION_SCANNER = \
+         UNINSTALLED_INTROSPECTION_SRCDIR=$(top_srcdir) \
+         UNINSTALLED_INTROSPECTION_BUILDDIR=$(top_builddir) \
+         $(top_builddir)/g-ir-scanner
++endif
++
++if USE_CROSS_WRAPPER
++CROSS_WRAPPER_ARG = --use-binary-wrapper=$(GI_CROSS_WRAPPER)
++else
++CROSS_WRAPPER_ARG =
++endif
++
++if USE_LDD_WRAPPER
++LDD_WRAPPER_ARG = --use-ldd-wrapper=$(GI_LDD_WRAPPER)
++else
++LDD_WRAPPER_ARG =
++endif
+ 
+ INTROSPECTION_SCANNER_ARGS = \
+     --verbose \
++    $(CROSS_WRAPPER_ARG) \
++    $(LDD_WRAPPER_ARG) \
+     -I$(top_srcdir) \
+     --add-include-path=$(srcdir) \
+     --add-include-path=$(top_srcdir)/gir \
+@@ -24,9 +48,15 @@ INTROSPECTION_SCANNER_ARGS = \
+     --add-include-path=$(top_builddir) \
+     --add-include-path=$(top_builddir)/gir
+ 
++if USE_CROSS_WRAPPER
++INTROSPECTION_COMPILER = \
++    env PATH=".libs:$(PATH)" \
++        $(GI_CROSS_WRAPPER) $(top_builddir)/.libs/g-ir-compiler$(EXEEXT)
++else
+ INTROSPECTION_COMPILER = \
+     env PATH=".libs:$(PATH)" \
+         $(top_builddir)/g-ir-compiler$(EXEEXT)
++endif
+ 
+ INTROSPECTION_COMPILER_ARGS = \
+     --includedir=$(srcdir) \
+@@ -35,6 +65,14 @@ INTROSPECTION_COMPILER_ARGS = \
+     --includedir=$(top_builddir) \
+     --includedir=$(top_builddir)/gir
+ 
++if USE_HOST_GI
++INTROSPECTION_DOCTOOL = \
++    env PATH="$(PATH)" \
++        LPATH=.libs \
++        PYTHONPATH=$(top_builddir):$(top_srcdir) \
++        UNINSTALLED_INTROSPECTION_BUILDDIR=$(top_builddir) \
++        g-ir-doc-tool
++else
+ INTROSPECTION_DOCTOOL = \
+     env PATH=".libs:$(PATH)" \
+         LPATH=.libs \
+@@ -42,6 +80,7 @@ INTROSPECTION_DOCTOOL = \
+         UNINSTALLED_INTROSPECTION_SRCDIR=$(top_srcdir) \
+         UNINSTALLED_INTROSPECTION_BUILDDIR=$(top_builddir) \
+         $(top_builddir)/g-ir-doc-tool
++endif
+ 
+ INTROSPECTION_DOCTOOL_ARGS = \
+     --add-include-path=$(srcdir) \
+diff --git a/configure.ac b/configure.ac
+index 6c91fa5..21340a5 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -360,6 +360,48 @@ fi
+ 
+ AC_SUBST(EXTRA_LINK_FLAGS)
+ 
++AC_ARG_ENABLE([host-gi],
++[AS_HELP_STRING([--enable-host-gi],[Use gobject introspection tools installed in the host system (useful when cross-compiling)])],
++[case "${enableval}" in
++  yes) host_gi=true ;;
++  no)  host_gi=false ;;
++  *) AC_MSG_ERROR([bad value ${enableval} for --enable-host-gi]) ;;
++esac],[host_gi=false])
++AM_CONDITIONAL([USE_HOST_GI], [test x$host_gi = xtrue])
++
++AC_ARG_ENABLE([gi-cross-wrapper],
++[AS_HELP_STRING([--enable-gi-cross-wrapper=path],[Use a wrapper to run gicompiler and binaries produced by giscanner (useful when cross-compiling)])],
++[
++GI_CROSS_WRAPPER="${enableval}"
++use_wrapper=true
++],[
++GI_CROSS_WRAPPER=""
++use_wrapper=false
++])
++AC_SUBST(GI_CROSS_WRAPPER)
++AM_CONDITIONAL([USE_CROSS_WRAPPER], [test x$use_wrapper = xtrue])
++
++AC_ARG_ENABLE([gi-ldd-wrapper],
++[AS_HELP_STRING([--enable-gi-ldd-wrapper=path],[Use a ldd wrapper instead of system's ldd command in giscanner (useful when cross-compiling)])],
++[
++GI_LDD_WRAPPER="${enableval}"
++use_ldd_wrapper=true
++],[
++GI_LDD_WRAPPER=""
++use_ldd_wrapper=false
++])
++AC_SUBST(GI_LDD_WRAPPER)
++AM_CONDITIONAL([USE_LDD_WRAPPER], [test x$use_ldd_wrapper = xtrue])
++
++AC_ARG_ENABLE([introspection-data],
++[AS_HELP_STRING([--enable-introspection-data],[Build introspection data (.gir and .typelib files) in addition to library and tools])],
++[case "${enableval}" in
++  yes) introspection_data=true ;;
++  no)  introspection_data=false ;;
++  *) AC_MSG_ERROR([bad value ${enableval} for --enable-introspection-data]) ;;
++esac],[introspection_data=true])
++AM_CONDITIONAL([BUILD_INTROSPECTION_DATA], [test x$introspection_data = xtrue])
++
+ AC_CONFIG_FILES([
+ Makefile
+ tests/Makefile
+diff --git a/tests/Makefile.am b/tests/Makefile.am
+index bdd0fa7..75dd3c9 100644
+--- a/tests/Makefile.am
++++ b/tests/Makefile.am
+@@ -1,6 +1,9 @@
+ include $(top_srcdir)/common.mk
+ 
+-SUBDIRS = . scanner repository offsets warn
++SUBDIRS = . scanner repository warn
++if BUILD_INTROSPECTION_DATA
++SUBDIRS += offsets
++endif
+ 
+ EXTRA_DIST=
+ BUILT_SOURCES=
+-- 
+2.7.0
+
diff --git a/package/gobject-introspection/0003-giscanner-add-use-binary-wrapper-option.patch b/package/gobject-introspection/0003-giscanner-add-use-binary-wrapper-option.patch
new file mode 100644
index 0000000000..0fd2299f98
--- /dev/null
+++ b/package/gobject-introspection/0003-giscanner-add-use-binary-wrapper-option.patch
@@ -0,0 +1,52 @@
+From 704b888d0abfb01067352c40156f49f655691c7c Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Mon, 19 Oct 2015 18:26:40 +0300
+Subject: [PATCH] giscanner: add --use-binary-wrapper option
+
+With this option, giscanner will use a wrapper executable to run
+binaries it's producing, instead of running them directly. This
+is useful when binaries are cross-compiled and cannot be run directly,
+but they can be run using for example QEMU emulation.
+
+Upstream-Status: Pending [review on oe-core list]
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+Signed-off-by: Adam Duskett <aduskett@gmail.com>
+---
+ giscanner/scannermain.py | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+diff --git a/giscanner/scannermain.py b/giscanner/scannermain.py
+index 633496f..d684cd0 100755
+--- a/giscanner/scannermain.py
++++ b/giscanner/scannermain.py
+@@ -124,6 +124,9 @@ def _get_option_parser():
+     parser.add_option("", "--program",
+                       action="store", dest="program", default=None,
+                       help="program to execute")
++    parser.add_option("", "--use-binary-wrapper",
++                      action="store", dest="wrapper", default=None,
++                      help="wrapper to use for running programs (useful when cross-compiling)")
+     parser.add_option("", "--program-arg",
+                       action="append", dest="program_args", default=[],
+                       help="extra arguments to program")
+@@ -419,6 +422,17 @@ def create_binary(transformer, options, args):
+                                               gdump_parser.get_error_quark_functions())
+ 
+     shlibs = resolve_shlibs(options, binary, options.libraries)
++    if options.wrapper:
++        # The wrapper needs the binary itself, not the libtool wrapper script,
++        # so we check if libtool has sneaked the binary into .libs subdirectory
++        # and adjust the path accordingly
++        import os.path
++        dir_name, binary_name  = os.path.split(binary.args[0])
++        libtool_binary = os.path.join(dir_name, '.libs', binary_name)
++        if os.path.exists(libtool_binary):
++            binary.args[0] = libtool_binary
++	# Then prepend the wrapper to the command line to execute
++        binary.args = [options.wrapper] + binary.args
+     gdump_parser.set_introspection_binary(binary)
+     gdump_parser.parse()
+     return shlibs
+-- 
+2.7.0
+
diff --git a/package/gobject-introspection/0004-giscanner-add-a-use-ldd-wrapper-option.patch b/package/gobject-introspection/0004-giscanner-add-a-use-ldd-wrapper-option.patch
new file mode 100644
index 0000000000..97880ef51d
--- /dev/null
+++ b/package/gobject-introspection/0004-giscanner-add-a-use-ldd-wrapper-option.patch
@@ -0,0 +1,48 @@
+From d4ad57fd4a32c4f0d2f0522a3090ef940746431b Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Fri, 30 Oct 2015 16:28:46 +0200
+Subject: [PATCH] giscanner: add a --use-ldd-wrapper option
+
+This is useful in cross-compile environments where system's ldd
+command does not work on binaries built for a different architecture
+
+Upstream-Status: Pending [review in oe-core]
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+Signed-off-by: Adam Duskett <aduskett@gmail.com>
+---
+ giscanner/scannermain.py | 3 +++
+ giscanner/shlibs.py      | 4 +++-
+ 2 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/giscanner/scannermain.py b/giscanner/scannermain.py
+index d684cd0..1b3b369 100755
+--- a/giscanner/scannermain.py
++++ b/giscanner/scannermain.py
+@@ -127,6 +127,9 @@ def _get_option_parser():
+     parser.add_option("", "--use-binary-wrapper",
+                       action="store", dest="wrapper", default=None,
+                       help="wrapper to use for running programs (useful when cross-compiling)")
++    parser.add_option("", "--use-ldd-wrapper",
++                      action="store", dest="ldd_wrapper", default=None,
++                      help="wrapper to use instead of ldd (useful when cross-compiling)")
+     parser.add_option("", "--program-arg",
+                       action="append", dest="program_args", default=[],
+                       help="extra arguments to program")
+diff --git a/giscanner/shlibs.py b/giscanner/shlibs.py
+index c93d20c..c5b5942 100644
+--- a/giscanner/shlibs.py
++++ b/giscanner/shlibs.py
+@@ -105,7 +105,9 @@ def _resolve_non_libtool(options, binary, libraries):
+             args.extend(libtool)
+             args.append('--mode=execute')
+         platform_system = platform.system()
+-        if platform_system == 'Darwin':
++        if options.ldd_wrapper:
++            args.extend([options.ldd_wrapper, binary.args[0]])
++        elif platform_system == 'Darwin':
+             args.extend(['otool', '-L', binary.args[0]])
+         else:
+             args.extend(['ldd', binary.args[0]])
+-- 
+2.7.0
+
diff --git a/package/gobject-introspection/0005-Prefix-pkg-config-paths-with-PKG_CONFIG_SYSROOT_DIR-.patch b/package/gobject-introspection/0005-Prefix-pkg-config-paths-with-PKG_CONFIG_SYSROOT_DIR-.patch
new file mode 100644
index 0000000000..501ffe3125
--- /dev/null
+++ b/package/gobject-introspection/0005-Prefix-pkg-config-paths-with-PKG_CONFIG_SYSROOT_DIR-.patch
@@ -0,0 +1,97 @@
+From e08b3677dd04d6ec407ba8f74f601b2d51310eff Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Thu, 8 Oct 2015 18:30:35 +0300
+Subject: [PATCH] Prefix pkg-config paths with PKG_CONFIG_SYSROOT_DIR
+ environment variable
+
+This environment variable sets the location of sysroot directory in cross-compilation
+environments; if the variable is not set, the prefix will be empty.
+
+Upstream-Status: Pending [review on oe-core list]
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+Signed-off-by: Adam Duskett <aduskett@gmail.com>
+---
+ Makefile-gir.am     | 18 +++++++++---------
+ m4/introspection.m4 |  8 ++++----
+ 2 files changed, 13 insertions(+), 13 deletions(-)
+
+diff --git a/Makefile-gir.am b/Makefile-gir.am
+index a09260a..ba6e89e 100644
+--- a/Makefile-gir.am
++++ b/Makefile-gir.am
+@@ -55,8 +55,8 @@ else
+ endif
+ 
+ # glib
+-GLIB_INCLUDEDIR=$(shell "${PKG_CONFIG}" --variable=includedir glib-2.0)/glib-2.0
+-GLIB_LIBDIR=$(shell "${PKG_CONFIG}" --variable=libdir glib-2.0)
++GLIB_INCLUDEDIR=$(PKG_CONFIG_SYSROOT_DIR)$(shell "${PKG_CONFIG}" --variable=includedir glib-2.0)/glib-2.0
++GLIB_LIBDIR=$(PKG_CONFIG_SYSROOT_DIR)$(shell "${PKG_CONFIG}" --variable=libdir glib-2.0)
+ 
+ GLIB_LIBRARY=glib-2.0
+ 
+@@ -92,8 +92,8 @@ GLib-2.0.gir: g-ir-scanner g-ir-compiler$(EXEEXT)
+ gir/DBusGLib-1.0.typelib: GObject-2.0.gir
+ 
+ # gobject
+-GOBJECT_INCLUDEDIR=$(shell "${PKG_CONFIG}" --variable=includedir gobject-2.0)/glib-2.0
+-GOBJECT_LIBDIR=$(shell "${PKG_CONFIG}" --variable=libdir gobject-2.0)
++GOBJECT_INCLUDEDIR=$(PKG_CONFIG_SYSROOT_DIR)$(shell "${PKG_CONFIG}" --variable=includedir gobject-2.0)/glib-2.0
++GOBJECT_LIBDIR=$(PKG_CONFIG_SYSROOT_DIR)$(shell "${PKG_CONFIG}" --variable=libdir gobject-2.0)
+ 
+ GOBJECT_LIBRARY=gobject-2.0
+ 
+@@ -120,8 +120,8 @@ GObject_2_0_gir_FILES = \
+ BUILT_GIRSOURCES += GObject-2.0.gir
+ 
+ # gmodule
+-GMODULE_INCLUDEDIR=$(shell "${PKG_CONFIG}" --variable=includedir gmodule-2.0)/glib-2.0
+-GMODULE_LIBDIR=$(shell "${PKG_CONFIG}" --variable=libdir gmodule-2.0)
++GMODULE_INCLUDEDIR=$(PKG_CONFIG_SYSROOT_DIR)$(shell "${PKG_CONFIG}" --variable=includedir gmodule-2.0)/glib-2.0
++GMODULE_LIBDIR=$(PKG_CONFIG_SYSROOT_DIR)$(shell "${PKG_CONFIG}" --variable=libdir gmodule-2.0)
+ 
+ GMODULE_LIBRARY=gmodule-2.0
+ 
+@@ -146,13 +146,13 @@ GModule_2_0_gir_FILES = $(GLIB_INCLUDEDIR)/gmodule.h \
+ BUILT_GIRSOURCES += GModule-2.0.gir
+ 
+ # gio
+-GIO_INCLUDEDIR=$(shell "${PKG_CONFIG}" --variable=includedir gio-2.0)/glib-2.0
+-GIO_LIBDIR=$(shell "${PKG_CONFIG}" --variable=libdir gio-2.0)
++GIO_INCLUDEDIR=$(PKG_CONFIG_SYSROOT_DIR)$(shell "${PKG_CONFIG}" --variable=includedir gio-2.0)/glib-2.0
++GIO_LIBDIR=$(PKG_CONFIG_SYSROOT_DIR)$(shell "${PKG_CONFIG}" --variable=libdir gio-2.0)
+ 
+ GIO_LIBRARY=gio-2.0
+ 
+ if HAVE_GIO_UNIX
+-GIO_UNIX_INCLUDEDIR = $(shell "${PKG_CONFIG}" --variable=includedir gio-unix-2.0)/gio-unix-2.0
++GIO_UNIX_INCLUDEDIR = $(PKG_CONFIG_SYSROOT_DIR)$(shell "${PKG_CONFIG}" --variable=includedir gio-unix-2.0)/gio-unix-2.0
+ GIO_UNIX_HDRS = $(GIO_UNIX_INCLUDEDIR)/gio/*.h
+ GIO_UNIX_PACKAGES = gio-unix-2.0
+ else
+diff --git a/m4/introspection.m4 b/m4/introspection.m4
+index d89c3d9..b562266 100644
+--- a/m4/introspection.m4
++++ b/m4/introspection.m4
+@@ -56,14 +56,14 @@ m4_define([_GOBJECT_INTROSPECTION_CHECK_INTERNAL],
+     INTROSPECTION_GIRDIR=
+     INTROSPECTION_TYPELIBDIR=
+     if test "x$found_introspection" = "xyes"; then
+-       INTROSPECTION_SCANNER=`$PKG_CONFIG --variable=g_ir_scanner gobject-introspection-1.0`
+-       INTROSPECTION_COMPILER=`$PKG_CONFIG --variable=g_ir_compiler gobject-introspection-1.0`
+-       INTROSPECTION_GENERATE=`$PKG_CONFIG --variable=g_ir_generate gobject-introspection-1.0`
++       INTROSPECTION_SCANNER=$PKG_CONFIG_SYSROOT_DIR`$PKG_CONFIG --variable=g_ir_scanner gobject-introspection-1.0`
++       INTROSPECTION_COMPILER=$PKG_CONFIG_SYSROOT_DIR`$PKG_CONFIG --variable=g_ir_compiler gobject-introspection-1.0`
++       INTROSPECTION_GENERATE=$PKG_CONFIG_SYSROOT_DIR`$PKG_CONFIG --variable=g_ir_generate gobject-introspection-1.0`
+        INTROSPECTION_GIRDIR=`$PKG_CONFIG --variable=girdir gobject-introspection-1.0`
+        INTROSPECTION_TYPELIBDIR="$($PKG_CONFIG --variable=typelibdir gobject-introspection-1.0)"
+        INTROSPECTION_CFLAGS=`$PKG_CONFIG --cflags gobject-introspection-1.0`
+        INTROSPECTION_LIBS=`$PKG_CONFIG --libs gobject-introspection-1.0`
+-       INTROSPECTION_MAKEFILE=`$PKG_CONFIG --variable=datadir gobject-introspection-1.0`/gobject-introspection-1.0/Makefile.introspection
++       INTROSPECTION_MAKEFILE=$PKG_CONFIG_SYSROOT_DIR`$PKG_CONFIG --variable=datadir gobject-introspection-1.0`/gobject-introspection-1.0/Makefile.introspection
+     fi
+     AC_SUBST(INTROSPECTION_SCANNER)
+     AC_SUBST(INTROSPECTION_COMPILER)
+-- 
+2.7.0
+
diff --git a/package/gobject-introspection/0006-add-PYTHON_INCLUDES-override.patch b/package/gobject-introspection/0006-add-PYTHON_INCLUDES-override.patch
new file mode 100644
index 0000000000..5539b467a9
--- /dev/null
+++ b/package/gobject-introspection/0006-add-PYTHON_INCLUDES-override.patch
@@ -0,0 +1,39 @@
+From 08ee7e704d3ebbb783e26768074a5969d6843204 Mon Sep 17 00:00:00 2001
+From: Adam Duskett <Adamduskett@outlook.com>
+Date: Wed, 18 Oct 2017 17:31:19 -0400
+Subject: [PATCH] add PYTHON_INCLUDES override
+
+As the configure script mixes up host/target python. Equivalent to the
+similar code in dbus-python.
+
+Signed-off-by: Adam Duskett <Adamduskett@outlook.com>
+---
+ m4/python.m4 | 12 +++++++++++-
+ 1 file changed, 11 insertions(+), 1 deletion(-)
+
+diff --git a/m4/python.m4 b/m4/python.m4
+index ed5559d..9853263 100644
+--- a/m4/python.m4
++++ b/m4/python.m4
+@@ -43,7 +43,17 @@ AC_DEFUN([AM_CHECK_PYTHON_HEADERS],
+ [AC_REQUIRE([AM_PATH_PYTHON])
+ AC_MSG_CHECKING(for headers required to compile python extensions)
+ dnl deduce PYTHON_INCLUDES
+-PYTHON_INCLUDES=`$PYTHON-config --includes`
++if test "${PYTHON_INCLUDES+set}" = set; then
++  AC_MSG_NOTICE([PYTHON_INCLUDES overridden to: $PYTHON_INCLUDES])
++else
++  if test -x "$PYTHON_CONFIG"; then
++    PYTHON_INCLUDES=`$PYTHON_CONFIG --includes 2>/dev/null`
++  else
++    PYTHON_INCLUDES=`$PYTHON -c "import distutils.sysconfig, sys; sys.stdout.write(distutils.sysconfig.get_python_inc(True))"`
++    PYTHON_INCLUDES="-I$PYTHON_INCLUDES"
++  fi
++fi
++
+ AC_SUBST(PYTHON_INCLUDES)
+ dnl check if the headers exist:
+ save_CPPFLAGS="$CPPFLAGS"
+-- 
+2.13.6
+
diff --git a/package/gobject-introspection/0007-giscanner-add-a-lib-dirs-envvar-option.patch b/package/gobject-introspection/0007-giscanner-add-a-lib-dirs-envvar-option.patch
new file mode 100644
index 0000000000..4ec527dcc0
--- /dev/null
+++ b/package/gobject-introspection/0007-giscanner-add-a-lib-dirs-envvar-option.patch
@@ -0,0 +1,73 @@
+From e48f1e18f5ea41656f0ba10fe61d69d2604b0064 Mon Sep 17 00:00:00 2001
+From: Alexander Kanavin <alex.kanavin@gmail.com>
+Date: Wed, 3 Jan 2018 17:02:01 +0200
+Subject: [PATCH] giscanner: add a --lib-dirs-envvar option
+
+By default LD_LIBRARY_PATH is set to the list of target library paths;
+this breaks down in cross-compilation environment, as we need to run a
+native emulation wrapper rather than the target binary itself. This patch
+allows exporting those paths to a different environment variable
+which can be picked up and used by the wrapper.
+
+Upstream-Status: Pending
+Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com>
+
+---
+ giscanner/ccompiler.py   | 4 ++--
+ giscanner/dumper.py      | 3 ++-
+ giscanner/scannermain.py | 3 +++
+ 3 files changed, 7 insertions(+), 3 deletions(-)
+
+diff --git a/giscanner/ccompiler.py b/giscanner/ccompiler.py
+index 29de0ee..928eae8 100644
+--- a/giscanner/ccompiler.py
++++ b/giscanner/ccompiler.py
+@@ -109,7 +109,7 @@ class CCompiler(object):
+ 
+             self._cflags_no_deprecation_warnings = "-Wno-deprecated-declarations"
+ 
+-    def get_internal_link_flags(self, args, libtool, libraries, extra_libraries, libpaths):
++    def get_internal_link_flags(self, args, libtool, libraries, extra_libraries, libpaths, lib_dirs_envvar):
+         # An "internal" link is where the library to be introspected
+         # is being built in the current directory.
+ 
+@@ -119,7 +119,7 @@ class CCompiler(object):
+         if self.check_is_msvc():
+             runtime_path_envvar = ['LIB', 'PATH']
+         else:
+-            runtime_path_envvar = ['LD_LIBRARY_PATH']
++            runtime_path_envvar = ['LD_LIBRARY_PATH'] if not lib_dirs_envvar else [lib_dirs_envvar]
+             # Search the current directory first
+             # (This flag is not supported nor needed for Visual C++)
+             args.append('-L.')
+diff --git a/giscanner/dumper.py b/giscanner/dumper.py
+index 7f77bd2..db96df6 100644
+--- a/giscanner/dumper.py
++++ b/giscanner/dumper.py
+@@ -259,7 +259,8 @@ class DumpCompiler(object):
+                                                    libtool,
+                                                    self._options.libraries,
+                                                    self._options.extra_libraries,
+-                                                   self._options.library_paths)
++                                                   self._options.library_paths,
++                                                   self._options.lib_dirs_envvar)
+             args.extend(pkg_config_libs)
+ 
+         else:
+diff --git a/giscanner/scannermain.py b/giscanner/scannermain.py
+index 38a45c1..b603850 100755
+--- a/giscanner/scannermain.py
++++ b/giscanner/scannermain.py
+@@ -130,6 +130,9 @@ def _get_option_parser():
+     parser.add_option("", "--use-ldd-wrapper",
+                       action="store", dest="ldd_wrapper", default=None,
+                       help="wrapper to use instead of ldd (useful when cross-compiling)")
++    parser.add_option("", "--lib-dirs-envvar",
++                      action="store", dest="lib_dirs_envvar", default=None,
++                      help="environment variable to write a list of library directories to (for running the transient binary), instead of standard LD_LIBRARY_PATH")
+     parser.add_option("", "--program-arg",
+                       action="append", dest="program_args", default=[],
+                       help="extra arguments to program")
+-- 
+2.15.1
+
diff --git a/package/gobject-introspection/0008-add-Float128.patch b/package/gobject-introspection/0008-add-Float128.patch
new file mode 100644
index 0000000000..661affda34
--- /dev/null
+++ b/package/gobject-introspection/0008-add-Float128.patch
@@ -0,0 +1,28 @@
+scanner: Add _Float128
+
+The ISO/IEC TS 18661-3:2015 standard added new floating point types to
+the C standard.
+
+Newer versions of the GNU C library started exposing `_Float128` in the
+headers, which means we need to add this type to the known tokens, to
+avoid warnings.
+
+original commit:
+https://github.com/GNOME/gobject-introspection/commit/8cf3e8e5cf6d0d49db359f50c6eb0bc9ca22fbef
+
+Signed-off-by: Adam Duskett <aduskett@gmail.com>
+---
+
+diff --git a/giscanner/scannerlexer.l b/giscanner/scannerlexer.l
+index 7dbab5c8..218024e9 100644
+--- a/giscanner/scannerlexer.l
++++ b/giscanner/scannerlexer.l
+@@ -192,7 +192,7 @@ stringtext				([^\\\"])|(\\.)
+ "__stdcall" 			        { /* ignore */ }
+ "__w64"					{ /* ignore */ }
+ "__int64"				{ return INT; }
+-
++"_Float128"                             { return FLOAT; }
+ 
+ "G_GINT64_CONSTANT"			{ return INTL_CONST; }
+ "G_GUINT64_CONSTANT"			{ return INTUL_CONST; }
diff --git a/package/gobject-introspection/Config.in b/package/gobject-introspection/Config.in
new file mode 100644
index 0000000000..42f58c8c0e
--- /dev/null
+++ b/package/gobject-introspection/Config.in
@@ -0,0 +1,34 @@
+config BR2_PACKAGE_GOBJECT_INTROSPECTION
+	bool "gobject-introspection"
+	depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS #host-qemu
+	depends on BR2_TOOLCHAIN_HAS_THREADS # libffi, libglib2
+	depends on BR2_TOOLCHAIN_USES_GLIBC
+	depends on BR2_USE_MMU # python3, libglib2
+	depends on BR2_USE_WCHAR # python3, libglib2 -> gettext
+	depends on !BR2_STATIC_LIBS
+	depends on !BR2_MIPS_NABI32
+	depends on BR2_LINUX_KERNEL # qemu-host
+	select BR2_PACKAGE_LIBFFI
+	select BR2_PACKAGE_ZLIB
+	select BR2_PACKAGE_LIBGLIB2
+	select BR2_PACKAGE_HOST_QEMU
+	select BR2_PACKAGE_HOST_QEMU_LINUX_USER_MODE
+	select BR2_PACKAGE_PYTHON3 if !BR2_PACKAGE_PYTHON
+	help
+	  GObject introspection is a middleware layer between C
+	  libraries (using GObject) and language bindings. The C library
+	  can be scanned at compile time and generate a metadata file,
+	  in addition to the actual native C library. Then at runtime,
+	  language bindings can read this metadata and automatically
+	  provide bindings to call into the C library.
+
+	  https://wiki.gnome.org/action/show/Projects/GObjectIntrospection
+
+comment "gobject-introspection needs a glibc toolchain w/ wchar, threads, dynamic library"
+	depends on BR2_USE_MMU
+	depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS
+	depends on !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS || \
+		BR2_STATIC_LIBS || !BR2_TOOLCHAIN_USES_GLIBC
+
+comment "gobject-introspection needs a Linux kernel to be built"
+	depends on !BR2_LINUX_KERNEL
diff --git a/package/gobject-introspection/cross-ldd b/package/gobject-introspection/cross-ldd
new file mode 100644
index 0000000000..ef2ca20f39
--- /dev/null
+++ b/package/gobject-introspection/cross-ldd
@@ -0,0 +1,362 @@
+#!/bin/bash
+
+# ldd drop-in replacement for cross-compilation toolchains.
+
+# This file is a slightly modified version of xldd.in from
+# crosstool-ng 1.22.0
+
+# In order to use it, copy it in same directory than other
+# toolchain binaries and rename it with same tuple. 
+# (i.e. /opt/arm-sysmic-linux-gnueabihf/bin/arm-sysmic-linux-gnueabihf-ldd)
+# Thus, this will automaticaly detect necessary information
+# about your toolchain.
+
+export LC_ALL=C
+version="forked from crosstool-ng 1.22.0"
+# Change it to 64 if necessary
+bits="32"
+sed="${SED:-sed}"
+grep="${GREP:-grep}"
+
+my_name="$( basename "${0}" )"
+prefix="${0%-ldd}"
+gcc="${prefix}-gcc"
+readelf="${prefix}-readelf"
+fake_load_addr_root="$((0xdeadbeef))"
+fake_load_addr_rpath="$((0xdeadc0de))"
+fake_load_addr_sysroot="$((0x8badf00d))"
+ld_library_path="/lib:/usr/lib"
+
+do_error() {
+    printf "%s: %s\n" "${my_name}" "$*" >&2
+}
+
+do_opt_error() {
+    do_error "$@"
+    printf "Try \`%s --help' for more information\n" "${my_name}" >&2
+}
+
+do_trace() {
+    local depth=0
+
+    [ -z "${CT_XLDD_VERBOSE}" ] && return 0
+
+    for((depth=0; "${#FUNCNAME[$((depth+1))]}" != 0; depth++)); do :; done
+    printf "%*s" $((4*(depth-1))) "" >&2
+    printf -- "$@" >&2
+}
+
+show_version() {
+    # Fake a real ldd, just in case some dumb script would check
+    cat <<_EOF_
+ldd (crosstool-NG) ${version}
+Copyright (C) 2010 "Yann E. MORIN" <yann.morin.1998@free.fr>
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+Licensed under the GPLv2, see the file LICENSES in the top-directory of the
+sources for this package.
+_EOF_
+}
+
+show_help() {
+    cat <<_EOF_
+Usage: ${my_name} [OPTION]... --root DIR FILE...
+      --help              print this help and exit
+      --version           print version information and exit
+      --root dir          treat dir as being the root of the target
+  -s, --show-system       mark libs from the sysroot with a trailing '[*]'
+                          and libs found via RPATH with a trailing '[+]'
+
+_EOF_
+    cat <<_EOF_ |fmt
+${my_name} tries to mimick the behavior of a real native ldd, but can be
+used in a cross-development environment. Here is how it differs from a
+real native ldd:
+
+If the CT_XLDD_VERBOSE variable is set and non-empty, then ${my_name} will
+print a lot of debug messages, explaining how it builds the library
+search path, and how each library was found and why.
+
+The LD_LIBRARY_PATH variable is not used, as it can not reliably be
+guessed except@runtime, and we can't run.
+
+${my_name} does not scan /etc/ld.so.cache, but instead uses /etc/ld.so.conf
+(it understands the include directives therein for libces that have that).
+
+${my_name} also interprets (tries to!) the RPATH/RUNPATH records found in
+the dynamic ELF section. Such paths are searched for only relative to
+the specified root, not from the sysroot (see below). Also, those paths
+are searched for not only for the file they appear in, but also for its
+dependencies.
+
+${my_name} will search the directory specified with --root for libraries
+to resolve the NEEDED tags. If --root is not set, then ${my_name} will
+use the value in the environment variable \${CT_XLDD_ROOT}. If neither
+is set, then this is an error.
+
+If NEEDED libraries can't be found in the specified root directory, then
+${my_name} will also look in the sysroot of the toolchain to see if it
+can find them.
+
+For NEEDED libraries that were found, the output will look like:
+        libneeded.so => /path/to/libneeded.so (0xloadaddr)
+
+and for those that were not found, the output will look like:
+        libneeded.so not found
+
+The paths are relative to the specified root directory, or to the sysroot
+(eg. /lib/libneeded.so, /usr/lib/libneeded.so, and so on...).
+
+The expected load address 'loadaddr' is a faked address to match the output
+of the real ldd, but has no actual meaning (set to some constants for now,
+0x8badf00d for libraries from the sysroot, 0xdeadc0de for those found via
+the RPATH/RUNPATH records, and 0xdeadbeef for others).
+_EOF_
+
+# Unimplemeted yet:
+#  -d, --data-relocs       process data relocations
+#  -r, --function-relocs   process data and function relocations
+#  -u, --unused            print unused direct dependencies
+#  -v, --verbose           print all information
+
+# See also this thread:
+#  http://sourceware.org/ml/crossgcc/2008-09/msg00057.html
+}
+
+# Parse command line options
+root="${CT_XLDD_ROOT}"
+show_system=
+while true; do
+    case "${1}" in
+        --help)
+            show_help
+            exit 0
+            ;;
+        --version)
+            show_version
+            exit 0
+            ;;
+        --root)
+            root="$2"
+            shift
+            ;;
+        --root=*)
+            root="${1#--root=}"
+            ;;
+        --show-system|-s)
+            show_system=1
+            ;;
+        -*)
+            do_opt_error "unrecognized option \`${1}'"
+            exit 1
+            ;;
+        *)
+            break
+            ;;
+    esac
+    shift
+done
+
+# Sanity checks
+sysroot="$( "${gcc}" -print-sysroot 2>/dev/null )"
+if [ -z "${sysroot}" ]; then
+    sysroot="$( "${gcc}" -print-file-name=libc.so 2>/dev/null \
+                |${sed} -r -e 's:/usr/lib/libc.so$::;'        \
+              )"
+fi
+if [ -z "${sysroot}" ]; then
+    do_error "unable to find sysroot for \`${gcc}'"
+fi
+
+if [ -z "${root}" ]; then
+    root=${sysroot}
+fi
+if [ ! -d "${root}" ]; then
+    do_error "\`${root}': no such file or directory"
+    exit 1
+fi
+
+do_report_needed_found() {
+    local needed="${1}"
+    local path="${2}"
+    local origin="${3}"
+    local loadaddr
+    local sys
+
+    case "${origin}" in
+        root)
+            loadaddr="${fake_load_addr_root}"
+            ;;
+        rpath)
+            loadaddr="${fake_load_addr_rpath}"
+            if [ -n "${show_system}" ]; then
+                sys=" [+]"
+            fi
+            ;;
+        sysroot)
+            loadaddr="${fake_load_addr_sysroot}"
+            if [ -n "${show_system}" ]; then
+                sys=" [*]"
+            fi
+            ;;
+    esac
+
+    printf "%8s%s => %s (0x%0*x)%s\n"   \
+           ""                           \
+           "${needed}"                  \
+           "${path}"                    \
+           "$((bits/4))"                \
+           "${loadaddr}"                \
+           "${sys}"
+}
+
+# Search a needed file, scanning ${lib_dir} in the root directory
+do_find_needed() {
+    local needed="${1}"
+    local -a list
+    local -a dirs
+    local found
+    local where
+    local base
+    local d i
+
+    do_trace "Searching for '%s'\n" "${needed}"
+
+    # rpath shall come first!
+    list=(                      \
+        "rpath:${root}"         \
+        "root:${root}"          \
+        "sysroot:${sysroot}"    \
+    )
+
+    for i in "${list[@]}"; do
+        where="${i%%:*}"
+        base="${i#*:}"
+        if [ "${where}" = "rpath" ]; then
+            dirs=( "${search_rpath[@]}" )
+        else
+            dirs=( "${needed_search_path[@]}" )
+        fi
+        for d in "${dirs[@]}"; do
+            do_trace "-> looking in '%s' (%s)\n" "${d}" "${where}"
+            if [ -f "${base}${d}/${needed}" ]; then
+                found="${d}/${needed}"
+                do_trace "---> found\n"
+                break 2
+            fi
+        done
+    done
+
+    if [ -n "${found}" ]; then
+        do_report_needed_found "${needed}" "${found}" "${where}"
+        do_process_file "${base}${found}"
+    else
+        printf "%8s%s not found\n" "" "${needed}"
+    fi
+
+    do_trace "Done searching for '%s'\n" "${needed}"
+}
+
+# Scan a file for all NEEDED tags
+do_process_file() {
+    local file="${1}"
+    local -a save_search_rpath
+    local n m
+    local found
+
+    do_trace "Parsing file '%s'\n" "${file}"
+
+    save_search_rpath=( "${search_rpath[@]}" )
+    for n in $( "${readelf}" -d "${file}"                                           \
+                |"${grep}" -E '\((RPATH|RUNPATH)\)'                                 \
+                |"${sed}" -r -e 's/^.*Library r(|un)path:[[:space:]]+\[(.*)\]$/\2/;'\
+              ); do
+        do_trace "-> adding rpath '%s'\n" "${n}"
+        search_rpath+=( "${n}" )
+    done
+    do_trace ": search path:\n"
+    for n in "${search_rpath[@]}" "${needed_search_path[@]}"; do
+        do_trace ": - '%s'\n" "${n}"
+    done
+    do_trace ": end search path\n"
+
+    for n in $( "${readelf}" -d "${file}"                                               \
+                |"${grep}" -E '\(NEEDED\)'                                              \
+                |"${sed}" -r -e 's/^.*Shared library:[[:space:]]+\[([^]]+)\].*/\1/;'    \
+              ); do
+        found=0
+        for m in "${needed_list[@]}"; do
+            [ "${n}" = "${m}" ] && found=1 && break
+        done
+        if [ ${found} -ne 0 ]; then
+            do_trace "-> skipping already known dependency '%s'\n" "${n}"
+            continue
+        fi
+        do_trace "-> handling new dependency '%s'\n" "${n}"
+        needed_list+=( "${n}" )
+        do_find_needed "${n}"
+        do_trace "-> done handling dependency '%s'\n" "${n}"
+    done
+
+    search_rpath=( "${save_search_rpath[@]}" )
+
+    do_trace "Finished parsing file '%s'\n" "${file}"
+}
+
+# Recursively scan a /etc/ld.so.conf file
+do_scan_etc_ldsoconf() {
+    local ldsoconf="${1}"
+    local g
+    local f
+
+    [ -f "${ldsoconf}" ] || return 0
+    do_trace "Parsing ld.so.conf: '%s'\n" "${ldsoconf}"
+
+    while read line; do
+        case "${line}" in
+            include\ *)
+                g="${root}${line#include }"
+                do_trace "-> handling include directive '%s'\n" "${g}"
+                for f in ${g}; do
+                    do_scan_etc_ldsoconf "${f}"
+                done
+                do_trace "-> finished handling include directive '%s'\n" "${g}"
+                ;;
+            \#*|"")
+                ;;
+            *)
+                do_trace "-> adding search dir '%s'\n" "${line}"
+                needed_search_path+=( "${line}" )
+                ;;
+        esac
+    done <"${ldsoconf}"
+
+    do_trace "Finished parsing ld.so.conf: '%s'\n" "${ldsoconf}"
+}
+
+# Build up the full list of search directories
+declare -a needed_search_path
+do_trace "Adding basic lib dirs\n"
+ld_library_path="${ld_library_path}:"
+while [ -n "${ld_library_path}" ]; do
+    d="${ld_library_path%%:*}"
+    if [ -n "${d}" ]; then
+        do_trace "-> adding search dir '%s'\n" "${d}"
+        needed_search_path+=( "${d}" )
+    fi
+    ld_library_path="${ld_library_path#*:}"
+done
+do_trace "Done adding basic lib dirs\n"
+do_trace "Scanning '/etc/ld.so.conf'\n"
+do_scan_etc_ldsoconf "${root}/etc/ld.so.conf"
+do_trace "Done scanning '/etc/ld.so.conf'\n"
+do_trace "Search path:\n"
+for p in "${needed_search_path[@]}"; do
+    do_trace "-> '%s'\n" "${p}"
+done
+
+declare -a needed_list
+declare -a search_rpath
+do_trace "Scanning file '%s'\n" "${1}"
+do_process_file "${1}"
+do_trace "Done scanning file '%s'\n" "${1}"
diff --git a/package/gobject-introspection/g-ir-compiler.in b/package/gobject-introspection/g-ir-compiler.in
new file mode 100644
index 0000000000..b2f97ea870
--- /dev/null
+++ b/package/gobject-introspection/g-ir-compiler.in
@@ -0,0 +1,2 @@
+#!/bin/sh
+$STAGING_DIR/usr/bin/g-ir-scanner-qemuwrapper $STAGING_DIR/usr/bin/g-ir-compiler.real "$@"
diff --git a/package/gobject-introspection/g-ir-scanner-lddwrapper.in b/package/gobject-introspection/g-ir-scanner-lddwrapper.in
new file mode 100644
index 0000000000..3313c877f8
--- /dev/null
+++ b/package/gobject-introspection/g-ir-scanner-lddwrapper.in
@@ -0,0 +1,2 @@
+#!/bin/sh
+${TARGET_CROSS}ldd "$@"
diff --git a/package/gobject-introspection/g-ir-scanner-qemuwrapper.in b/package/gobject-introspection/g-ir-scanner-qemuwrapper.in
new file mode 100644
index 0000000000..99838a9ce0
--- /dev/null
+++ b/package/gobject-introspection/g-ir-scanner-qemuwrapper.in
@@ -0,0 +1,10 @@
+#!/bin/sh
+# Use a modules directory which does not exist so we don't load random things
+# which may then get deleted (or their dependencies) and potentially segfault
+export GIO_MODULE_DIR=$STAGING_DIR/usr/lib/gio/modules-dummy
+PSEUDO_UNLOAD=1 $HOST_DIR/bin/qemu- at HOST_QEMU_ARCH@ -r @LINUX_VERSION@ -L $STAGING_DIR -E LD_LIBRARY_PATH=$GIR_EXTRA_LIBS_PATH:.libs:$STAGING_DIR/usr/lib:$STAGING_DIR/lib "$@"
+if [[ $? -ne 0 ]]; then
+    echo "If the above error message is about missing .so libraries, then setting up GIR_EXTRA_LIBS_PATH in the .mk file should help."
+    echo '(typically like this: GIR_EXTRA_LIBS_PATH="$(@D}/.libs")'
+    exit 1
+fi
diff --git a/package/gobject-introspection/g-ir-scanner.in b/package/gobject-introspection/g-ir-scanner.in
new file mode 100644
index 0000000000..71b1871cfd
--- /dev/null
+++ b/package/gobject-introspection/g-ir-scanner.in
@@ -0,0 +1,3 @@
+#!/bin/sh
+export GI_SCANNER_DISABLE_CACHE=1
+$HOST_DIR/bin/g-ir-scanner --lib-dirs-envvar=GIR_EXTRA_LIBS_PATH --use-binary-wrapper=$STAGING_DIR/usr/bin/g-ir-scanner-qemuwrapper --use-ldd-wrapper=$STAGING_DIR/usr/bin/g-ir-scanner-lddwrapper --add-include-path=$STAGING_DIR/usr/share/gir-1.0 "$@"
diff --git a/package/gobject-introspection/gobject-introspection.hash b/package/gobject-introspection/gobject-introspection.hash
new file mode 100644
index 0000000000..a41fb58a5f
--- /dev/null
+++ b/package/gobject-introspection/gobject-introspection.hash
@@ -0,0 +1,4 @@
+#From http://ftp.gnome.org/pub/GNOME/sources/gobject-introspection/1.54/gobject-introspection-1.54.1.sha256sum
+sha256 b88ded5e5f064ab58a93aadecd6d58db2ec9d970648534c63807d4f9a7bb877e gobject-introspection-1.54.1.tar.xz
+sha256 d245807f90032872d1438d741ed21e2490e1175dc8aa3afa5ddb6c8e529b58e5 COPYING.LGPL
+sha256 32b1062f7da84967e7019d01ab805935caa7ab7321a7ced0e30ebe75e5df1670 COPYING.GPL
diff --git a/package/gobject-introspection/gobject-introspection.mk b/package/gobject-introspection/gobject-introspection.mk
new file mode 100644
index 0000000000..a13f962ac1
--- /dev/null
+++ b/package/gobject-introspection/gobject-introspection.mk
@@ -0,0 +1,89 @@
+################################################################################
+#
+# gobject-introspection
+#
+################################################################################
+
+GOBJECT_INTROSPECTION_VERSION_MAJOR = 1.54
+GOBJECT_INTROSPECTION_VERSION = $(GOBJECT_INTROSPECTION_VERSION_MAJOR).1
+GOBJECT_INTROSPECTION_SITE = http://ftp.gnome.org/pub/GNOME/sources/gobject-introspection/$(GOBJECT_INTROSPECTION_VERSION_MAJOR)
+GOBJECT_INTROSPECTION_SOURCE = gobject-introspection-$(GOBJECT_INTROSPECTION_VERSION).tar.xz
+GOBJECT_INTROSPECTION_DEPENDENCIES = libffi zlib libglib2 host-qemu host-gobject-introspection
+GOBJECT_INTROSPECTION_INSTALL_STAGING = YES
+GOBJECT_INTROSPECTION_AUTORECONF = YES
+GOBJECT_INTROSPECTION_LICENSE = Dual LGPLv2+/GPLv2+
+GOBJECT_INTROSPECTION_LICENSE_FILES = COPYING.LGPL COPYING.GPL
+HOST_GOBJECT_INTROSPECTION_DEPENDENCIES = host-libglib2 host-flex host-bison
+
+GOBJECT_INTROSPECTION_CONF_OPTS = \
+	--enable-host-gi \
+	--disable-static \
+	--enable-gi-cross-wrapper=$(STAGING_DIR)/usr/bin/g-ir-scanner-qemuwrapper \
+	--enable-gi-ldd-wrapper=$(STAGING_DIR)/usr/bin/g-ir-scanner-lddwrapper \
+	--disable-introspection-data
+
+ifeq ($(BR2_PACKAGE_CAIRO),y)
+GOBJECT_INTROSPECTION_DEPENDENCIES += cairo
+endif
+ifeq ($(BR2_PACKAGE_LIBFFI),y)
+GOBJECT_INTROSPECTION_DEPENDENCIES += libffi
+endif
+
+ifeq ($(BR2_PACKAGE_PYTHON),y)
+GOBJECT_INTROSPECTION_DEPENDENCIES += python
+HOST_GOBJECT_INTROSPECTION_DEPENDENCIES += host-python
+GOBJECT_INTROSPECTION_PYTHON_PATH="$(STAGING_DIR)/usr/bin/python2"
+else
+GOBJECT_INTROSPECTION_DEPENDENCIES += python3
+HOST_GOBJECT_INTROSPECTION_DEPENDENCIES += host-python3
+GOBJECT_INTROSPECTION_PYTHON_PATH="$(STAGING_DIR)/usr/bin/python3"
+endif
+
+# GI_SCANNER_DISABLE_CACHE=1 prevents g-ir-scanner from writing cache data to $HOME
+GOBJECT_INTROSPECTION_CONF_ENV = \
+	GI_SCANNER_DISABLE_CACHE=1 \
+	GIR_EXTRA_LIBS_PATH=$(@D)/.libs \
+	PYTHON_INCLUDES="`$(GOBJECT_INTROSPECTION_PYTHON_PATH)-config --includes`"
+
+# Make sure g-ir-tool-template uses the host python.
+define GOBJECT_INTROSPECTION_FIX_TOOLTEMPLATE_PYTHON_PATH
+	sed -i -e '1s,#!.*,#!$(HOST_DIR)/bin/python,' $(@D)/tools/g-ir-tool-template.in
+endef
+GOBJECT_INTROSPECTION_PRE_CONFIGURE_HOOKS = GOBJECT_INTROSPECTION_FIX_TOOLTEMPLATE_PYTHON_PATH
+HOST_GOBJECT_INTROSPECTION_PRE_CONFIGURE_HOOKS = GOBJECT_INTROSPECTION_FIX_TOOLTEMPLATE_PYTHON_PATH
+
+GOBJECT_INTROSPECTION_WRAPPERS = \
+	g-ir-compiler \
+	g-ir-scanner
+
+# In order for gobject-introspection to work, qemu needs to run temporarily
+# to create binaries on the fly by g-ir-scanner. This involves creating
+# several wrapper scripts to accomplish the task:
+# g-ir-scanner-qemuwrapper, g-ir-compiler-wrapper,
+# g-ir-scanner-lddwrapper, g-ir-scanner-wrapper, g-ir-compiler-wrapper, and
+# finally a cross-ldd.
+define GOBJECT_INTROSPECTION_INSTALL_WRAPPERS
+	# Move the real binaries to their names.real, then replace them with
+	# the wrappers.
+	$(foreach w,$(GOBJECT_INTROSPECTION_WRAPPERS),
+		mv $(STAGING_DIR)/usr/bin/$(w) $(STAGING_DIR)/usr/bin/$(w).real
+		$(INSTALL) -D -m 755 \
+			package/gobject-introspection/$(w).in $(STAGING_DIR)/usr/bin/$(w)
+	)
+	$(INSTALL) -D -m 755 package/gobject-introspection/cross-ldd $(TARGET_CROSS)ldd
+	$(INSTALL) -D -m 755 package/gobject-introspection/g-ir-scanner-lddwrapper.in $(STAGING_DIR)/usr/bin/g-ir-scanner-lddwrapper
+	$(INSTALL) -D -m 755 package/gobject-introspection/g-ir-scanner-qemuwrapper.in $(STAGING_DIR)/usr/bin/g-ir-scanner-qemuwrapper
+	$(SED) "s|@HOST_QEMU_ARCH@|$(HOST_QEMU_ARCH)|g" $(STAGING_DIR)/usr/bin/g-ir-scanner-qemuwrapper
+	$(SED) "s|@LINUX_VERSION@|$(LINUX_VERSION)|g" $(STAGING_DIR)/usr/bin/g-ir-scanner-qemuwrapper
+	$(SED) "s at g_ir_scanner=.*@g_ir_scanner=$(STAGING_DIR)/usr/bin/g-ir-scanner at g" \
+	$(STAGING_DIR)/usr/lib/pkgconfig/gobject-introspection-1.0.pc
+
+	# The pkgconfig file needs to point towards the wrappers instead of the native
+	# binaries.
+	$(SED) "s at g_ir_compiler=.*@g_ir_compiler=$(STAGING_DIR)/usr/bin/g-ir-compiler at g" \
+	$(STAGING_DIR)/usr/lib/pkgconfig/gobject-introspection-1.0.pc
+endef
+GOBJECT_INTROSPECTION_POST_INSTALL_STAGING_HOOKS = GOBJECT_INTROSPECTION_INSTALL_WRAPPERS
+
+$(eval $(autotools-package))
+$(eval $(host-autotools-package))
-- 
2.14.3

[Buildroot] [RFCv2 2/3] gobject-introspection: new package

[Baruch Siach]

Hi Adam,

Thanks for working on this hard problem.

On Wed, Feb 07, 2018 at 04:23:54PM -0500, Adam Duskett wrote: 
> diff --git a/package/gobject-introspection/Config.in b/package/gobject-introspection/Config.in
> new file mode 100644
> index 0000000000..42f58c8c0e
> --- /dev/null
> +++ b/package/gobject-introspection/Config.in
> @@ -0,0 +1,34 @@
> +config BR2_PACKAGE_GOBJECT_INTROSPECTION
> +	bool "gobject-introspection"
> +	depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS #host-qemu
> +	depends on BR2_TOOLCHAIN_HAS_THREADS # libffi, libglib2
> +	depends on BR2_TOOLCHAIN_USES_GLIBC
> +	depends on BR2_USE_MMU # python3, libglib2
> +	depends on BR2_USE_WCHAR # python3, libglib2 -> gettext
> +	depends on !BR2_STATIC_LIBS
> +	depends on !BR2_MIPS_NABI32
> +	depends on BR2_LINUX_KERNEL # qemu-host

So the target board (not only architecture) must be one that qemu emulates. 
This is a pretty big limitation. Since GI does not require any specific 
hardware, would it be possible to use the qemu user space emulator[1] instead?

[1] https://qemu.weilnetz.de/doc/qemu-doc.html#QEMU-User-space-emulator

baruch

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
   - baruch at tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -

[Buildroot] [RFCv2 2/3] gobject-introspection: new package

[Adam Duskett]

Hey Baruch! Thanks so much for emailing back!

On Wed, Feb 7, 2018 at 11:43 PM, Baruch Siach <baruch@tkos.co.il> wrote:
> Hi Adam,
>
> Thanks for working on this hard problem.
>
Thanks! I must admit this isn't for completely selfless reasons.  I
want to use the gstreamer-python
bindings for a product I am working on, but alas it uses
gobject-intropsection. :)


> On Wed, Feb 07, 2018 at 04:23:54PM -0500, Adam Duskett wrote:
>> diff --git a/package/gobject-introspection/Config.in b/package/gobject-introspection/Config.in
>> new file mode 100644
>> index 0000000000..42f58c8c0e
>> --- /dev/null
>> +++ b/package/gobject-introspection/Config.in
>> @@ -0,0 +1,34 @@
>> +config BR2_PACKAGE_GOBJECT_INTROSPECTION
>> +     bool "gobject-introspection"
>> +     depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS #host-qemu
>> +     depends on BR2_TOOLCHAIN_HAS_THREADS # libffi, libglib2
>> +     depends on BR2_TOOLCHAIN_USES_GLIBC
>> +     depends on BR2_USE_MMU # python3, libglib2
>> +     depends on BR2_USE_WCHAR # python3, libglib2 -> gettext
>> +     depends on !BR2_STATIC_LIBS
>> +     depends on !BR2_MIPS_NABI32
>> +     depends on BR2_LINUX_KERNEL # qemu-host
>
> So the target board (not only architecture) must be one that qemu emulates.
> This is a pretty big limitation. Since GI does not require any specific
> hardware, would it be possible to use the qemu user space emulator[1] instead?
>
Good catch! I am using the qemu-userspace!

The only reason I am required BR2_LINUX_KERNEL is because I am using
$(LINUX_VERSION) in gobject-introspection.mk here:
$(SED) "s|@LINUX_VERSION@|$(LINUX_VERSION)|g"

which get's turned into:
PSEUDO_UNLOAD=1 $HOST_DIR/bin/qemu-x86_64 -r 3.10 -L ...

So a question then: Is there a variable I could use to use the toolchains
kernel header version instead? That would be an ideal solution in this
instance.

> [1] https://qemu.weilnetz.de/doc/qemu-doc.html#QEMU-User-space-emulator
>
> baruch
>
> --
>      http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
>    - baruch at tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -

[Buildroot] [RFCv2 2/3] gobject-introspection: new package

[Adam Duskett]

Side note:

BR2_TOOLCHAIN_HEADERS_AT_LEAST looks like it may provide what I would need,
which would allow me to drop the linux dependency.

Would this work for everybody?

Adam

On Thu, Feb 8, 2018 at 8:54 AM, Adam Duskett <aduskett@gmail.com> wrote:
> Hey Baruch! Thanks so much for emailing back!
>
> On Wed, Feb 7, 2018 at 11:43 PM, Baruch Siach <baruch@tkos.co.il> wrote:
>> Hi Adam,
>>
>> Thanks for working on this hard problem.
>>
> Thanks! I must admit this isn't for completely selfless reasons.  I
> want to use the gstreamer-python
> bindings for a product I am working on, but alas it uses
> gobject-intropsection. :)
>
>
>> On Wed, Feb 07, 2018 at 04:23:54PM -0500, Adam Duskett wrote:
>>> diff --git a/package/gobject-introspection/Config.in b/package/gobject-introspection/Config.in
>>> new file mode 100644
>>> index 0000000000..42f58c8c0e
>>> --- /dev/null
>>> +++ b/package/gobject-introspection/Config.in
>>> @@ -0,0 +1,34 @@
>>> +config BR2_PACKAGE_GOBJECT_INTROSPECTION
>>> +     bool "gobject-introspection"
>>> +     depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS #host-qemu
>>> +     depends on BR2_TOOLCHAIN_HAS_THREADS # libffi, libglib2
>>> +     depends on BR2_TOOLCHAIN_USES_GLIBC
>>> +     depends on BR2_USE_MMU # python3, libglib2
>>> +     depends on BR2_USE_WCHAR # python3, libglib2 -> gettext
>>> +     depends on !BR2_STATIC_LIBS
>>> +     depends on !BR2_MIPS_NABI32
>>> +     depends on BR2_LINUX_KERNEL # qemu-host
>>
>> So the target board (not only architecture) must be one that qemu emulates.
>> This is a pretty big limitation. Since GI does not require any specific
>> hardware, would it be possible to use the qemu user space emulator[1] instead?
>>
> Good catch! I am using the qemu-userspace!
>
> The only reason I am required BR2_LINUX_KERNEL is because I am using
> $(LINUX_VERSION) in gobject-introspection.mk here:
> $(SED) "s|@LINUX_VERSION@|$(LINUX_VERSION)|g"
>
> which get's turned into:
> PSEUDO_UNLOAD=1 $HOST_DIR/bin/qemu-x86_64 -r 3.10 -L ...
>
> So a question then: Is there a variable I could use to use the toolchains
> kernel header version instead? That would be an ideal solution in this
> instance.
>
>> [1] https://qemu.weilnetz.de/doc/qemu-doc.html#QEMU-User-space-emulator
>>
>> baruch
>>
>> --
>>      http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
>> =}------------------------------------------------ooO--U--Ooo------------{=
>>    - baruch at tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -

[Buildroot] [RFCv2 2/3] gobject-introspection: new package

[Baruch Siach]

Hi Adam,

On Thu, Feb 08, 2018 at 08:58:48AM -0500, Adam Duskett wrote:
> Side note:
> 
> BR2_TOOLCHAIN_HEADERS_AT_LEAST looks like it may provide what I would need,
> which would allow me to drop the linux dependency.
> 
> Would this work for everybody?

I think that BR2_TOOLCHAIN_HEADERS_AT_LEAST is indeed what you need. As I 
understand, GI needs the toolchain headers version, not the target kernel 
version. They are not always the same.

baruch

> On Thu, Feb 8, 2018 at 8:54 AM, Adam Duskett <aduskett@gmail.com> wrote:
> > Hey Baruch! Thanks so much for emailing back!
> >
> > On Wed, Feb 7, 2018 at 11:43 PM, Baruch Siach <baruch@tkos.co.il> wrote:
> >> Thanks for working on this hard problem.
> >>
> > Thanks! I must admit this isn't for completely selfless reasons.  I
> > want to use the gstreamer-python
> > bindings for a product I am working on, but alas it uses
> > gobject-intropsection. :)
> >
> >
> >> On Wed, Feb 07, 2018 at 04:23:54PM -0500, Adam Duskett wrote:
> >>> diff --git a/package/gobject-introspection/Config.in b/package/gobject-introspection/Config.in
> >>> new file mode 100644
> >>> index 0000000000..42f58c8c0e
> >>> --- /dev/null
> >>> +++ b/package/gobject-introspection/Config.in
> >>> @@ -0,0 +1,34 @@
> >>> +config BR2_PACKAGE_GOBJECT_INTROSPECTION
> >>> +     bool "gobject-introspection"
> >>> +     depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS #host-qemu
> >>> +     depends on BR2_TOOLCHAIN_HAS_THREADS # libffi, libglib2
> >>> +     depends on BR2_TOOLCHAIN_USES_GLIBC
> >>> +     depends on BR2_USE_MMU # python3, libglib2
> >>> +     depends on BR2_USE_WCHAR # python3, libglib2 -> gettext
> >>> +     depends on !BR2_STATIC_LIBS
> >>> +     depends on !BR2_MIPS_NABI32
> >>> +     depends on BR2_LINUX_KERNEL # qemu-host
> >>
> >> So the target board (not only architecture) must be one that qemu emulates.
> >> This is a pretty big limitation. Since GI does not require any specific
> >> hardware, would it be possible to use the qemu user space emulator[1] instead?
> >>
> > Good catch! I am using the qemu-userspace!
> >
> > The only reason I am required BR2_LINUX_KERNEL is because I am using
> > $(LINUX_VERSION) in gobject-introspection.mk here:
> > $(SED) "s|@LINUX_VERSION@|$(LINUX_VERSION)|g"
> >
> > which get's turned into:
> > PSEUDO_UNLOAD=1 $HOST_DIR/bin/qemu-x86_64 -r 3.10 -L ...
> >
> > So a question then: Is there a variable I could use to use the toolchains
> > kernel header version instead? That would be an ideal solution in this
> > instance.
> >
> >> [1] https://qemu.weilnetz.de/doc/qemu-doc.html#QEMU-User-space-emulator

-- 
     http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
   - baruch at tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -

[Buildroot] [RFCv2 2/3] gobject-introspection: new package

[Adam Duskett]

Hey Baruch;

On Thu, Feb 8, 2018 at 11:40 AM, Baruch Siach <baruch@tkos.co.il> wrote:
> Hi Adam,
>
> On Thu, Feb 08, 2018 at 08:58:48AM -0500, Adam Duskett wrote:
>> Side note:
>>
>> BR2_TOOLCHAIN_HEADERS_AT_LEAST looks like it may provide what I would need,
>> which would allow me to drop the linux dependency.
>>
>> Would this work for everybody?
>
> I think that BR2_TOOLCHAIN_HEADERS_AT_LEAST is indeed what you need. As I
> understand, GI needs the toolchain headers version, not the target kernel
> version. They are not always the same.
>
> baruch
>
Great! I tried that out and it works correctly.

>> On Thu, Feb 8, 2018 at 8:54 AM, Adam Duskett <aduskett@gmail.com> wrote:
>> > Hey Baruch! Thanks so much for emailing back!
>> >
>> > On Wed, Feb 7, 2018 at 11:43 PM, Baruch Siach <baruch@tkos.co.il> wrote:
>> >> Thanks for working on this hard problem.
>> >>
>> > Thanks! I must admit this isn't for completely selfless reasons.  I
>> > want to use the gstreamer-python
>> > bindings for a product I am working on, but alas it uses
>> > gobject-intropsection. :)
>> >
>> >
>> >> On Wed, Feb 07, 2018 at 04:23:54PM -0500, Adam Duskett wrote:
>> >>> diff --git a/package/gobject-introspection/Config.in b/package/gobject-introspection/Config.in
>> >>> new file mode 100644
>> >>> index 0000000000..42f58c8c0e
>> >>> --- /dev/null
>> >>> +++ b/package/gobject-introspection/Config.in
>> >>> @@ -0,0 +1,34 @@
>> >>> +config BR2_PACKAGE_GOBJECT_INTROSPECTION
>> >>> +     bool "gobject-introspection"
>> >>> +     depends on BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS #host-qemu
>> >>> +     depends on BR2_TOOLCHAIN_HAS_THREADS # libffi, libglib2
>> >>> +     depends on BR2_TOOLCHAIN_USES_GLIBC
>> >>> +     depends on BR2_USE_MMU # python3, libglib2
>> >>> +     depends on BR2_USE_WCHAR # python3, libglib2 -> gettext
>> >>> +     depends on !BR2_STATIC_LIBS
>> >>> +     depends on !BR2_MIPS_NABI32
>> >>> +     depends on BR2_LINUX_KERNEL # qemu-host
>> >>
>> >> So the target board (not only architecture) must be one that qemu emulates.
>> >> This is a pretty big limitation. Since GI does not require any specific
>> >> hardware, would it be possible to use the qemu user space emulator[1] instead?
>> >>
>> > Good catch! I am using the qemu-userspace!
>> >
>> > The only reason I am required BR2_LINUX_KERNEL is because I am using
>> > $(LINUX_VERSION) in gobject-introspection.mk here:
>> > $(SED) "s|@LINUX_VERSION@|$(LINUX_VERSION)|g"
>> >
>> > which get's turned into:
>> > PSEUDO_UNLOAD=1 $HOST_DIR/bin/qemu-x86_64 -r 3.10 -L ...
>> >
>> > So a question then: Is there a variable I could use to use the toolchains
>> > kernel header version instead? That would be an ideal solution in this
>> > instance.
>> >
>> >> [1] https://qemu.weilnetz.de/doc/qemu-doc.html#QEMU-User-space-emulator
>
> --
>      http://baruch.siach.name/blog/                  ~. .~   Tk Open Systems
> =}------------------------------------------------ooO--U--Ooo------------{=
>    - baruch at tkos.co.il - tel: +972.52.368.4656, http://www.tkos.co.il -

[Buildroot] [RFCv2 3/3] gstreamer1: support gobject-introspection

[Adam Duskett]

Signed-off-by: Adam Duskett <aduskett@gmail.com>
---
 package/gstreamer1/gstreamer1/gstreamer1.mk | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/package/gstreamer1/gstreamer1/gstreamer1.mk b/package/gstreamer1/gstreamer1/gstreamer1.mk
index ea9f29a4f3..022676ca23 100644
--- a/package/gstreamer1/gstreamer1/gstreamer1.mk
+++ b/package/gstreamer1/gstreamer1/gstreamer1.mk
@@ -31,4 +31,9 @@ GSTREAMER1_DEPENDENCIES = \
 	libglib2 \
 	$(if $(BR2_PACKAGE_LIBUNWIND),libunwind)
 
+ifeq ($(BR2_PACKAGE_GOBJECT_INTROSPECTION),y)
+GSTREAMER1_DEPENDENCIES += gobject-introspection
+TARGET_MAKE_ENV += GIR_EXTRA_LIBS_PATH="$(@D)/gst/.libs:$(@D)/libs/gst/base/.libs"
+endif
+
 $(eval $(autotools-package))
-- 
2.14.3