[Qemu-devel] [PATCH 0/2] add libcacard shared object target

[Qemu-devel] [PATCH 0/2] add libcacard shared object target

[Alon Levy]

These patches add a standalone shared object target using libtool for libcacard,
see second patch for details on usage. First patch adds required --libdir customization
akin to --bindir.

Alon Levy (2):
  configure: add libdir and --libdir
  libcacard: add libcacard.la target

 Makefile           |    9 +++++++++
 configure          |    7 ++++++-
 libcacard/Makefile |   30 ++++++++++++++++++++++++++----
 3 files changed, 41 insertions(+), 5 deletions(-)

-- 
1.7.5.1

[Qemu-devel] [PATCH 1/2] configure: add libdir and --libdir

[Alon Levy]

Signed-off-by: Alon Levy <alevy@redhat.com>
---
 configure |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/configure b/configure
index d7dba5d..0627f1d 100755
--- a/configure
+++ b/configure
@@ -146,6 +146,7 @@ mandir="\${prefix}/share/man"
 datadir="\${prefix}/share/qemu"
 docdir="\${prefix}/share/doc/qemu"
 bindir="\${prefix}/bin"
+libdir="\${prefix}/lib"
 sysconfdir="\${prefix}/etc"
 confsuffix="/qemu"
 slirp="yes"
@@ -536,6 +537,8 @@ for opt do
   ;;
   --bindir=*) bindir="$optarg"
   ;;
+  --libdir=*) libdir="$optarg"
+  ;;
   --datadir=*) datadir="$optarg"
   ;;
   --docdir=*) docdir="$optarg"
@@ -2630,6 +2633,7 @@ fi
 echo "Install prefix    $prefix"
 echo "BIOS directory    `eval echo $datadir`"
 echo "binary directory  `eval echo $bindir`"
+echo "library directory `eval echo $libdir`"
 echo "config directory  `eval echo $sysconfdir`"
 if test "$mingw32" = "no" ; then
 echo "Manual directory  `eval echo $mandir`"
@@ -2722,6 +2726,7 @@ echo >> $config_host_mak
 echo all: >> $config_host_mak
 echo "prefix=$prefix" >> $config_host_mak
 echo "bindir=$bindir" >> $config_host_mak
+echo "libdir=$libdir" >> $config_host_mak
 echo "mandir=$mandir" >> $config_host_mak
 echo "datadir=$datadir" >> $config_host_mak
 echo "sysconfdir=$sysconfdir" >> $config_host_mak
-- 
1.7.5.1

[Qemu-devel] [PATCH 2/2] libcacard: add libcacard.la target

[Alon Levy]

No flag to configure is required. Instead, added a libcacard.la target that
is not built by default, only when requested explicitly via:

mkdir build
cd build
../configure
make libcacard.la
make install-libcacard

Uses libtool to do actual linking of object files and shared library, and
installing. Tested only under linux, but supposed to work on other systems as
well.

Signed-off-by: Alon Levy <alevy@redhat.com>
---
 Makefile           |    9 +++++++++
 configure          |    2 +-
 libcacard/Makefile |   30 ++++++++++++++++++++++++++----
 3 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 2b0438c..4bb6ca6 100644
--- a/Makefile
+++ b/Makefile
@@ -120,6 +120,15 @@ version.o: $(SRC_PATH)/version.rc config-host.mak
 version-obj-$(CONFIG_WIN32) += version.o
 ######################################################################
 
+.PHONY: libcacard.la install-libcacard
+libcacard.la: $(GENERATED_HEADERS) $(oslib-obj-y) qemu-malloc.o qemu-timer-common.o $(trace-obj-y)
+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" libcacard.la,)
+
+install-libcacard: libcacard.la
+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" install-libcacard,)
+
+######################################################################
+
 qemu-img.o: qemu-img-cmds.h
 qemu-img.o qemu-tool.o qemu-nbd.o qemu-io.o cmd.o: $(GENERATED_HEADERS)
 
diff --git a/configure b/configure
index 0627f1d..26e32f3 100755
--- a/configure
+++ b/configure
@@ -3595,7 +3595,7 @@ if [ "$source_path" != `pwd` ]; then
     # out of tree build
     mkdir -p libcacard
     rm -f libcacard/Makefile
-    ln -s "$source_path/libcacard/Makefile" libcacard/Makefile
+    ln -s -f "$source_path/libcacard/Makefile" libcacard/Makefile
 fi
 
 d=libuser
diff --git a/libcacard/Makefile b/libcacard/Makefile
index 1d34df0..8abad26 100644
--- a/libcacard/Makefile
+++ b/libcacard/Makefile
@@ -4,15 +4,37 @@
 
 $(call set-vpath, $(SRC_PATH):$(SRC_PATH)/libcacard)
 
-QEMU_OBJS=$(addprefix ../, $(oslib-obj-y) $(trace-obj-y) qemu-malloc.o qemu-timer-common.o)
+QEMU_TRACE_OBJS=$(addprefix ../,$(trace-obj-y))
+
+QEMU_BASE_OBJS=$(addprefix ../,$(oslib-obj-y) qemu-malloc.o qemu-timer-common.o)
+
+# objects linked against normal qemu binaries, not compiled with libtool
+QEMU_OBJS = $(QEMU_BASE_OBJS) $(QEMU_TRACE_OBJS)
+
+# objects linked into a shared library, built with libtool with -fPIC if required
+QEMU_BASE_OBJS_LIB=$(addsuffix .lo,$(basename $(QEMU_BASE_OBJS)))
+
+QEMU_OBJS_LIB = $(QEMU_BASE_OBJS_LIB) $(QEMU_TRACE_OBJS)
 
 QEMU_CFLAGS+=-I../
 
+libcacard.lib-y=$(addsuffix .lo,$(basename $(libcacard-y)))
+
 vscclient: $(libcacard-y) $(QEMU_OBJS) vscclient.o
-	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $(TARGET_DIR)$@")
+	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $@")
 
-all: vscclient
+$(libcacard.lib-y) $(QEMU_BASE_OBJS_LIB) : %.lo: %.c
+	$(call quiet-command,libtool --mode=compile --quiet --tag=CC $(CC) $(QEMU_CFLAGS) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
+
+libcacard.la: $(libcacard.lib-y) $(QEMU_OBJS_LIB)
+	$(call quiet-command,libtool --mode=link --quiet --tag=CC $(CC) $(libcacard_libs) -lrt -rpath $(libdir) -o $@ $^,"  lt LINK $@")
 
 clean:
-	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient
+	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient libcacard.so *.lo .libs/* *.la
+	rm -Rf .libs
 
+install-libcacard: libcacard.la
+	$(INSTALL_DIR) "$(DESTDIR)$(libdir)"
+	libtool --mode=install $(INSTALL_PROG) libcacard.la "$(DESTDIR)$(libdir)"
+
+all: vscclient
-- 
1.7.5.1

Re: [Qemu-devel] [PATCH 2/2] libcacard: add libcacard.la target

[Paolo Bonzini]

On 05/15/2011 05:40 PM, Alon Levy wrote:
> -    ln -s "$source_path/libcacard/Makefile" libcacard/Makefile
> +    ln -s -f "$source_path/libcacard/Makefile" libcacard/Makefile

Use the "symlink" function rather than ln -s -f for portability to 
broken platforms, please.

Note that this requires libtool at build time rather than only for 
maintainers.  This is unlike all other software using it.  However, I 
believe this is not too bad given that a special make invocation is 
required.

Paolo

Re: [Qemu-devel] [PATCH 2/2] libcacard: add libcacard.la target

[Alon Levy]

On Mon, May 16, 2011 at 09:00:10AM +0200, Paolo Bonzini wrote:
> On 05/15/2011 05:40 PM, Alon Levy wrote:
> >-    ln -s "$source_path/libcacard/Makefile" libcacard/Makefile
> >+    ln -s -f "$source_path/libcacard/Makefile" libcacard/Makefile
> 
> Use the "symlink" function rather than ln -s -f for portability to
> broken platforms, please.
ok.

> 
> Note that this requires libtool at build time rather than only for
> maintainers.  This is unlike all other software using it.  However,
> I believe this is not too bad given that a special make invocation
> is required.

I was under the impression this was the way to use libtool (I've basically
followed the manual). Is there another way that is better?

> 
> Paolo

Re: [Qemu-devel] [PATCH 2/2] libcacard: add libcacard.la target

[Paolo Bonzini]

On 05/16/2011 12:25 PM, Alon Levy wrote:
> >  Note that this requires libtool at build time rather than only for
> >  maintainers.  This is unlike all other software using it.  However,
> >  I believe this is not too bad given that a special make invocation
> >  is required.
>
> I was under the impression this was the way to use libtool (I've basically
> followed the manual). Is there another way that is better?

Without using Autoconf, this is the way.

Usually programs that are fully autoconf-iscated will ship a subset of 
libtool sources in the tarball, build a custom version at configure 
time, and invoke it from the Makefile via ./libtool.  This has the 
advantage that only the maintainer needs to have libtool installed. 
OTOH we do not use Autoconf and I think this contributes to 99% of the 
bad name for Autoconf, so it's not something we want.

Paolo

Re: [Qemu-devel] [PATCH 2/2] libcacard: add libcacard.la target

[Gerd Hoffmann]

   Hi,

> Usually programs that are fully autoconf-iscated will ship a subset of
> libtool sources in the tarball, build a custom version at configure
> time, and invoke it from the Makefile via ./libtool. This has the
> advantage that only the maintainer needs to have libtool installed. OTOH
> we do not use Autoconf and I think this contributes to 99% of the bad
> name for Autoconf, so it's not something we want.

Another option would be to not use autoconf at all.  Building ELF shared 
libs isn't that difficuilt these days.  Question is whenever there is 
any non-ELF platform we care about (Windows maybe?).

cheers,
   Gerd

Re: [Qemu-devel] [PATCH 2/2] libcacard: add libcacard.la target

[Paolo Bonzini]

On 05/16/2011 02:06 PM, Gerd Hoffmann wrote:
>> Usually programs that are fully autoconf-iscated will ship a subset of
>> libtool sources in the tarball, build a custom version at configure
>> time, and invoke it from the Makefile via ./libtool. This has the
>> advantage that only the maintainer needs to have libtool installed. OTOH
>> we do not use Autoconf and I think this contributes to 99% of the bad
>> name for Autoconf, so it's not something we want.
>
> Another option would be to not use autoconf at all.
                                      ^^^^^^^^

You probably mean libtool?

> Building ELF shared
> libs isn't that difficuilt these days. Question is whenever there is any
> non-ELF platform we care about (Windows maybe?).

... and Darwin?

Paolo

Re: [Qemu-devel] [PATCH 2/2] libcacard: add libcacard.la target

[Alon Levy]

On Mon, May 16, 2011 at 02:07:55PM +0200, Paolo Bonzini wrote:
> On 05/16/2011 02:06 PM, Gerd Hoffmann wrote:
> >>Usually programs that are fully autoconf-iscated will ship a subset of
> >>libtool sources in the tarball, build a custom version at configure
> >>time, and invoke it from the Makefile via ./libtool. This has the
> >>advantage that only the maintainer needs to have libtool installed. OTOH
> >>we do not use Autoconf and I think this contributes to 99% of the bad
> >>name for Autoconf, so it's not something we want.
> >
> >Another option would be to not use autoconf at all.
>                                      ^^^^^^^^
> 
> You probably mean libtool?
> 
> >Building ELF shared
> >libs isn't that difficuilt these days. Question is whenever there is any
> >non-ELF platform we care about (Windows maybe?).
> 
> ... and Darwin?
> 

For linux all that is needed is to recompile all required sources with -fPIC (doesn't
make sense to force that on the objects linked to the rest of qemu), and link them with
gcc -shared. Does that work on Darwin? on Windows (mingw / cygwin)?

> Paolo
> 

Re: [Qemu-devel] [PATCH 2/2] libcacard: add libcacard.la target

[Paolo Bonzini]

On 05/16/2011 02:14 PM, Alon Levy wrote:
> On Mon, May 16, 2011 at 02:07:55PM +0200, Paolo Bonzini wrote:
>> On 05/16/2011 02:06 PM, Gerd Hoffmann wrote:
>>>> Usually programs that are fully autoconf-iscated will ship a subset of
>>>> libtool sources in the tarball, build a custom version at configure
>>>> time, and invoke it from the Makefile via ./libtool. This has the
>>>> advantage that only the maintainer needs to have libtool installed. OTOH
>>>> we do not use Autoconf and I think this contributes to 99% of the bad
>>>> name for Autoconf, so it's not something we want.
>>>
>>> Another option would be to not use autoconf at all.
>>                                       ^^^^^^^^
>>
>> You probably mean libtool?
>>
>>> Building ELF shared
>>> libs isn't that difficuilt these days. Question is whenever there is any
>>> non-ELF platform we care about (Windows maybe?).
>>
>> ... and Darwin?
>>
>
> For linux all that is needed is to recompile all required sources with -fPIC (doesn't
> make sense to force that on the objects linked to the rest of qemu), and link them with
> gcc -shared. Does that work on Darwin? on Windows (mingw / cygwin)?

No :(

Windows is a total mess, but Darwin is only slightly better and the 
naming conventions differ too (.dylib instead of .so for example).

Paolo

[Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Alon Levy]

No flag to configure is required. Instead, added a libcacard.la target that
is not built by default, only when requested explicitly via:

mkdir build
cd build
../configure
make libcacard.la
make install-libcacard

Uses libtool to do actual linking of object files and shared library, and
installing. Tested only under linux, but supposed to work on other systems as
well.

If libtool isn't found you get a message complaining about that, only at build
time (since it is not a default target I did not add a message at configure
time).

Note: please ignore the following warning message, it is harmless, and fixing
it would require using libtool to build trace-dtrace.lo which, since it isn't
built by gcc, I don't know how to do.

 *** Warning: Linking the shared library libcacard.la against the non-libtool
 *** objects  ../trace-dtrace.o is not portable!
---
 Makefile           |   17 +++++++++++++++++
 configure          |   12 +++++++++++-
 libcacard/Makefile |   38 ++++++++++++++++++++++++++++++++++----
 3 files changed, 62 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 2b0438c..0215307 100644
--- a/Makefile
+++ b/Makefile
@@ -119,6 +119,23 @@ version.o: $(SRC_PATH)/version.rc config-host.mak
 
 version-obj-$(CONFIG_WIN32) += version.o
 ######################################################################
+# Support building shared library libcacard
+
+.PHONY: libcacard.la install-libcacard
+ifeq ($(LIBTOOL),)
+libcacard.la:
+	@echo libtool is missing, please install and rerun configure
+
+install-libcacard:
+	@echo libtool is missing, please install and rerun configure
+else
+libcacard.la: $(GENERATED_HEADERS) $(oslib-obj-y) qemu-malloc.o qemu-timer-common.o $(trace-obj-y)
+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" libcacard.la,)
+
+install-libcacard: libcacard.la
+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" install-libcacard,)
+endif
+######################################################################
 
 qemu-img.o: qemu-img-cmds.h
 qemu-img.o qemu-tool.o qemu-nbd.o qemu-io.o cmd.o: $(GENERATED_HEADERS)
diff --git a/configure b/configure
index 0627f1d..e62841e 100755
--- a/configure
+++ b/configure
@@ -1276,6 +1276,15 @@ if ! has $pkg_config; then
 fi
 
 ##########################################
+# libtool probe
+
+if ! has libtool; then
+    libtool=
+else
+    libtool=libtool
+fi
+
+##########################################
 # Sparse probe
 if test "$sparse" != "no" ; then
   if has cgcc; then
@@ -3060,6 +3069,7 @@ echo "AR=$ar" >> $config_host_mak
 echo "OBJCOPY=$objcopy" >> $config_host_mak
 echo "LD=$ld" >> $config_host_mak
 echo "WINDRES=$windres" >> $config_host_mak
+echo "LIBTOOL=$libtool" >> $config_host_mak
 echo "CFLAGS=$CFLAGS" >> $config_host_mak
 echo "QEMU_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak
 echo "QEMU_INCLUDES=$QEMU_INCLUDES" >> $config_host_mak
@@ -3595,7 +3605,7 @@ if [ "$source_path" != `pwd` ]; then
     # out of tree build
     mkdir -p libcacard
     rm -f libcacard/Makefile
-    ln -s "$source_path/libcacard/Makefile" libcacard/Makefile
+    symlink "$source_path/libcacard/Makefile" libcacard/Makefile
 fi
 
 d=libuser
diff --git a/libcacard/Makefile b/libcacard/Makefile
index 1d34df0..3a5ad61 100644
--- a/libcacard/Makefile
+++ b/libcacard/Makefile
@@ -4,15 +4,45 @@
 
 $(call set-vpath, $(SRC_PATH):$(SRC_PATH)/libcacard)
 
-QEMU_OBJS=$(addprefix ../, $(oslib-obj-y) $(trace-obj-y) qemu-malloc.o qemu-timer-common.o)
+QEMU_TRACE_OBJS=$(addprefix ../,$(trace-obj-y))
+
+QEMU_BASE_OBJS=$(addprefix ../,$(oslib-obj-y) qemu-malloc.o qemu-timer-common.o)
+
+# objects linked against normal qemu binaries, not compiled with libtool
+QEMU_OBJS = $(QEMU_BASE_OBJS) $(QEMU_TRACE_OBJS)
+
+# objects linked into a shared library, built with libtool with -fPIC if required
+QEMU_BASE_OBJS_LIB=$(addsuffix .lo,$(basename $(QEMU_BASE_OBJS)))
+
+QEMU_OBJS_LIB = $(QEMU_BASE_OBJS_LIB) $(QEMU_TRACE_OBJS)
 
 QEMU_CFLAGS+=-I../
 
+libcacard.lib-y=$(addsuffix .lo,$(basename $(libcacard-y)))
+
 vscclient: $(libcacard-y) $(QEMU_OBJS) vscclient.o
-	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $(TARGET_DIR)$@")
+	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $@")
+
+clean:
+	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient libcacard.so *.lo .libs/* *.la
+	rm -Rf .libs
 
 all: vscclient
 
-clean:
-	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient
+ifeq ($(LIBTOOL),)
+libcacard.la:
+	@echo libtool is missing, please install and rerun configure
+
+install-libcacard:
+	@echo libtool is missing, please install and rerun configure
+else
+$(libcacard.lib-y) $(QEMU_BASE_OBJS_LIB) : %.lo: %.c
+	$(call quiet-command,libtool --mode=compile --quiet --tag=CC $(CC) $(QEMU_CFLAGS) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
+
+libcacard.la: $(libcacard.lib-y) $(QEMU_OBJS_LIB)
+	$(call quiet-command,libtool --mode=link --quiet --tag=CC $(CC) $(libcacard_libs) -lrt -rpath $(libdir) -o $@ $^,"  lt LINK $@")
 
+install-libcacard: libcacard.la
+	$(INSTALL_DIR) "$(DESTDIR)$(libdir)"
+	libtool --mode=install $(INSTALL_PROG) libcacard.la "$(DESTDIR)$(libdir)"
+endif
-- 
1.7.5.1

Re: [Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Anthony Liguori]

On 05/16/2011 08:25 AM, Alon Levy wrote:
> No flag to configure is required. Instead, added a libcacard.la target that
> is not built by default, only when requested explicitly via:
>
> mkdir build
> cd build
> ../configure
> make libcacard.la
> make install-libcacard
>
> Uses libtool to do actual linking of object files and shared library, and
> installing. Tested only under linux, but supposed to work on other systems as
> well.
>
> If libtool isn't found you get a message complaining about that, only at build
> time (since it is not a default target I did not add a message at configure
> time).
>
> Note: please ignore the following warning message, it is harmless, and fixing
> it would require using libtool to build trace-dtrace.lo which, since it isn't
> built by gcc, I don't know how to do.
>
>   *** Warning: Linking the shared library libcacard.la against the non-libtool
>   *** objects  ../trace-dtrace.o is not portable!

I don't think slipping in libtool like this is such a good idea.

Why do you need this target?

Isn't la just a static archive compiled with -fPIC?  Doesn't the whole 
code base need to be compiled with -fPIC then (and isn't the warning 
above a legitimate concern?).

Regards,

Anthony Liguori

> ---
>   Makefile           |   17 +++++++++++++++++
>   configure          |   12 +++++++++++-
>   libcacard/Makefile |   38 ++++++++++++++++++++++++++++++++++----
>   3 files changed, 62 insertions(+), 5 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 2b0438c..0215307 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -119,6 +119,23 @@ version.o: $(SRC_PATH)/version.rc config-host.mak
>
>   version-obj-$(CONFIG_WIN32) += version.o
>   ######################################################################
> +# Support building shared library libcacard
> +
> +.PHONY: libcacard.la install-libcacard
> +ifeq ($(LIBTOOL),)
> +libcacard.la:
> +	@echo libtool is missing, please install and rerun configure
> +
> +install-libcacard:
> +	@echo libtool is missing, please install and rerun configure
> +else
> +libcacard.la: $(GENERATED_HEADERS) $(oslib-obj-y) qemu-malloc.o qemu-timer-common.o $(trace-obj-y)
> +	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" libcacard.la,)
> +
> +install-libcacard: libcacard.la
> +	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" install-libcacard,)
> +endif
> +######################################################################
>
>   qemu-img.o: qemu-img-cmds.h
>   qemu-img.o qemu-tool.o qemu-nbd.o qemu-io.o cmd.o: $(GENERATED_HEADERS)
> diff --git a/configure b/configure
> index 0627f1d..e62841e 100755
> --- a/configure
> +++ b/configure
> @@ -1276,6 +1276,15 @@ if ! has $pkg_config; then
>   fi
>
>   ##########################################
> +# libtool probe
> +
> +if ! has libtool; then
> +    libtool=
> +else
> +    libtool=libtool
> +fi
> +
> +##########################################
>   # Sparse probe
>   if test "$sparse" != "no" ; then
>     if has cgcc; then
> @@ -3060,6 +3069,7 @@ echo "AR=$ar">>  $config_host_mak
>   echo "OBJCOPY=$objcopy">>  $config_host_mak
>   echo "LD=$ld">>  $config_host_mak
>   echo "WINDRES=$windres">>  $config_host_mak
> +echo "LIBTOOL=$libtool">>  $config_host_mak
>   echo "CFLAGS=$CFLAGS">>  $config_host_mak
>   echo "QEMU_CFLAGS=$QEMU_CFLAGS">>  $config_host_mak
>   echo "QEMU_INCLUDES=$QEMU_INCLUDES">>  $config_host_mak
> @@ -3595,7 +3605,7 @@ if [ "$source_path" != `pwd` ]; then
>       # out of tree build
>       mkdir -p libcacard
>       rm -f libcacard/Makefile
> -    ln -s "$source_path/libcacard/Makefile" libcacard/Makefile
> +    symlink "$source_path/libcacard/Makefile" libcacard/Makefile
>   fi
>
>   d=libuser
> diff --git a/libcacard/Makefile b/libcacard/Makefile
> index 1d34df0..3a5ad61 100644
> --- a/libcacard/Makefile
> +++ b/libcacard/Makefile
> @@ -4,15 +4,45 @@
>
>   $(call set-vpath, $(SRC_PATH):$(SRC_PATH)/libcacard)
>
> -QEMU_OBJS=$(addprefix ../, $(oslib-obj-y) $(trace-obj-y) qemu-malloc.o qemu-timer-common.o)
> +QEMU_TRACE_OBJS=$(addprefix ../,$(trace-obj-y))
> +
> +QEMU_BASE_OBJS=$(addprefix ../,$(oslib-obj-y) qemu-malloc.o qemu-timer-common.o)
> +
> +# objects linked against normal qemu binaries, not compiled with libtool
> +QEMU_OBJS = $(QEMU_BASE_OBJS) $(QEMU_TRACE_OBJS)
> +
> +# objects linked into a shared library, built with libtool with -fPIC if required
> +QEMU_BASE_OBJS_LIB=$(addsuffix .lo,$(basename $(QEMU_BASE_OBJS)))
> +
> +QEMU_OBJS_LIB = $(QEMU_BASE_OBJS_LIB) $(QEMU_TRACE_OBJS)
>
>   QEMU_CFLAGS+=-I../
>
> +libcacard.lib-y=$(addsuffix .lo,$(basename $(libcacard-y)))
> +
>   vscclient: $(libcacard-y) $(QEMU_OBJS) vscclient.o
> -	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $(TARGET_DIR)$@")
> +	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $@")
> +
> +clean:
> +	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient libcacard.so *.lo .libs/* *.la
> +	rm -Rf .libs
>
>   all: vscclient
>
> -clean:
> -	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient
> +ifeq ($(LIBTOOL),)
> +libcacard.la:
> +	@echo libtool is missing, please install and rerun configure
> +
> +install-libcacard:
> +	@echo libtool is missing, please install and rerun configure
> +else
> +$(libcacard.lib-y) $(QEMU_BASE_OBJS_LIB) : %.lo: %.c
> +	$(call quiet-command,libtool --mode=compile --quiet --tag=CC $(CC) $(QEMU_CFLAGS) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
> +
> +libcacard.la: $(libcacard.lib-y) $(QEMU_OBJS_LIB)
> +	$(call quiet-command,libtool --mode=link --quiet --tag=CC $(CC) $(libcacard_libs) -lrt -rpath $(libdir) -o $@ $^,"  lt LINK $@")
>
> +install-libcacard: libcacard.la
> +	$(INSTALL_DIR) "$(DESTDIR)$(libdir)"
> +	libtool --mode=install $(INSTALL_PROG) libcacard.la "$(DESTDIR)$(libdir)"
> +endif

Re: [Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Paolo Bonzini]

On 05/16/2011 03:28 PM, Anthony Liguori wrote:
>>
>>
>>   *** Warning: Linking the shared library libcacard.la against the
>> non-libtool
>>   *** objects  ../trace-dtrace.o is not portable!
>
> I don't think slipping in libtool like this is such a good idea.

I disagree but, the warning is indeed legitimate, so

NACK

> Isn't la just a static archive compiled with -fPIC?

No, .la is a text file pointing (most importantly) to the static 
library, the shared library, and the dependencies of the static library.

Alon, do you need this to comply with some packaging guidelines 
forbidding static libraries?

Paolo

Re: [Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Alon Levy]

On Mon, May 16, 2011 at 03:59:53PM +0200, Paolo Bonzini wrote:
> On 05/16/2011 03:28 PM, Anthony Liguori wrote:
> >>
> >>
> >>  *** Warning: Linking the shared library libcacard.la against the
> >>non-libtool
> >>  *** objects  ../trace-dtrace.o is not portable!
> >
> >I don't think slipping in libtool like this is such a good idea.
> 
> I disagree but, the warning is indeed legitimate, so
> 
> NACK
> 
> >Isn't la just a static archive compiled with -fPIC?
> 
> No, .la is a text file pointing (most importantly) to the static
> library, the shared library, and the dependencies of the static
> library.
> 
> Alon, do you need this to comply with some packaging guidelines
> forbidding static libraries?
> 
<Answering both you and Anthony>
I'm basically trying to replace the current shared object built by
the standalone libcacard project. Since we are deprecating that on
account of not wanting to maintain two code bases, I need a replacement
shared object producing something somewhere. It seems best to do it
within the project and not, say, as spec file for an rpm, for obvious
reasons of wanting this to be distribution agnostic. I've settled on libtool
as the linker solution since it seems to be the de facto standard, please
correct me on this point if I'm wrong. We are not using autoconf, so
I've called it directly in it's various modes, compile, link and install.

Regarding your concerns from above:
The libcacard.la target produces a shared object with the right version
symlinks (libcacard.so.0.0.0, libcacard.so.0 and libcacard.so) thanks to libtool

Legitemacy of the warning: basically libtool is concerned about linking in position
dependant code. But the trace-dtrace.o contains no .rodata section and is not actually
a problem for the linker, I've verfied the resulting library works fine with spicec (the
spice client using it).

I'd appreciate any suggestion of a replacement for libtool if it is not appropriate.
Note that this building of a shared library is not something new - we've talked about
this before in relation to libcacard inclusion inside qemu git repository.

> Paolo

Re: [Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Paolo Bonzini]

On 05/16/2011 07:37 PM, Alon Levy wrote:
> I've settled on libtool
> as the linker solution since it seems to be the de facto standard, please
> correct me on this point if I'm wrong. We are not using autoconf, so
> I've called it directly in it's various modes, compile, link and install.

I agree.  I don't dislike this particularly :) if at all.

> Legitemacy of the warning: basically libtool is concerned about linking in position
> dependant code. But the trace-dtrace.o contains no .rodata section and is not actually
> a problem for the linker, I've verfied the resulting library works fine with spicec (the
> spice client using it).

I'm not sure, however, that glibc would still keep the sharing of .text.

> I'd appreciate any suggestion of a replacement for libtool if it is not appropriate.
> Note that this building of a shared library is not something new - we've talked about
> this before in relation to libcacard inclusion inside qemu git repository.

Do you really need tracing besides as a dependency of qemu_malloc? 
Perhaps you can recompile qemu-malloc.o specially for libcacard, and 
force usage of the nop backend.

Paolo

Re: [Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Alon Levy]

On Mon, May 16, 2011 at 04:44:03PM +0200, Paolo Bonzini wrote:
> On 05/16/2011 07:37 PM, Alon Levy wrote:
> >I've settled on libtool
> >as the linker solution since it seems to be the de facto standard, please
> >correct me on this point if I'm wrong. We are not using autoconf, so
> >I've called it directly in it's various modes, compile, link and install.
> 
> I agree.  I don't dislike this particularly :) if at all.
> 
> >Legitemacy of the warning: basically libtool is concerned about linking in position
> >dependant code. But the trace-dtrace.o contains no .rodata section and is not actually
> >a problem for the linker, I've verfied the resulting library works fine with spicec (the
> >spice client using it).
> 
> I'm not sure, however, that glibc would still keep the sharing of .text.
> 

I'll check.

> >I'd appreciate any suggestion of a replacement for libtool if it is not appropriate.
> >Note that this building of a shared library is not something new - we've talked about
> >this before in relation to libcacard inclusion inside qemu git repository.
> 
> Do you really need tracing besides as a dependency of qemu_malloc?
> Perhaps you can recompile qemu-malloc.o specially for libcacard, and
> force usage of the nop backend.

Sounds like a very good idea for short term. Otoh if I'm already building libcacard
with qemu dependencies, it would be nice if I could benefit from the tracing framework.

I'll investigate building trace-dtrace.lo and if this doesn't work I'll try nop backend.

> 
> Paolo
> 

Re: [Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Alon Levy]

On Mon, May 16, 2011 at 08:28:49AM -0500, Anthony Liguori wrote:
> On 05/16/2011 08:25 AM, Alon Levy wrote:
> >No flag to configure is required. Instead, added a libcacard.la target that
> >is not built by default, only when requested explicitly via:
> >
> >mkdir build
> >cd build
> >../configure
> >make libcacard.la
> >make install-libcacard
> >
> >Uses libtool to do actual linking of object files and shared library, and
> >installing. Tested only under linux, but supposed to work on other systems as
> >well.
> >
> >If libtool isn't found you get a message complaining about that, only at build
> >time (since it is not a default target I did not add a message at configure
> >time).
> >
> >Note: please ignore the following warning message, it is harmless, and fixing
> >it would require using libtool to build trace-dtrace.lo which, since it isn't
> >built by gcc, I don't know how to do.
> >
> >  *** Warning: Linking the shared library libcacard.la against the non-libtool
> >  *** objects  ../trace-dtrace.o is not portable!
> 
> I don't think slipping in libtool like this is such a good idea.

Forgot from my reply to Paolo: libtool is complaining about the only object I didn't
rebuild, trace-dtrace.o, the rest I've added rules specifically to rebuild into lo
(-fPIC'ed) objects under libcacard (including specifically any qemu support code). I
didn't do the same for trace-dtrace.o because a) I didn't find an easy way of doing it
on account of it not being built by gcc b) it wasn't a real problem like I mentioned in
the reply to Paolo.

> 
> Why do you need this target?
Answered in the reply to Paolo's email.

> 
> Isn't la just a static archive compiled with -fPIC?  Doesn't the
> whole code base need to be compiled with -fPIC then (and isn't the
> warning above a legitimate concern?).
> 
> Regards,
> 
> Anthony Liguori
> 
> >---
> >  Makefile           |   17 +++++++++++++++++
> >  configure          |   12 +++++++++++-
> >  libcacard/Makefile |   38 ++++++++++++++++++++++++++++++++++----
> >  3 files changed, 62 insertions(+), 5 deletions(-)
> >
> >diff --git a/Makefile b/Makefile
> >index 2b0438c..0215307 100644
> >--- a/Makefile
> >+++ b/Makefile
> >@@ -119,6 +119,23 @@ version.o: $(SRC_PATH)/version.rc config-host.mak
> >
> >  version-obj-$(CONFIG_WIN32) += version.o
> >  ######################################################################
> >+# Support building shared library libcacard
> >+
> >+.PHONY: libcacard.la install-libcacard
> >+ifeq ($(LIBTOOL),)
> >+libcacard.la:
> >+	@echo libtool is missing, please install and rerun configure
> >+
> >+install-libcacard:
> >+	@echo libtool is missing, please install and rerun configure
> >+else
> >+libcacard.la: $(GENERATED_HEADERS) $(oslib-obj-y) qemu-malloc.o qemu-timer-common.o $(trace-obj-y)
> >+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" libcacard.la,)
> >+
> >+install-libcacard: libcacard.la
> >+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" install-libcacard,)
> >+endif
> >+######################################################################
> >
> >  qemu-img.o: qemu-img-cmds.h
> >  qemu-img.o qemu-tool.o qemu-nbd.o qemu-io.o cmd.o: $(GENERATED_HEADERS)
> >diff --git a/configure b/configure
> >index 0627f1d..e62841e 100755
> >--- a/configure
> >+++ b/configure
> >@@ -1276,6 +1276,15 @@ if ! has $pkg_config; then
> >  fi
> >
> >  ##########################################
> >+# libtool probe
> >+
> >+if ! has libtool; then
> >+    libtool=
> >+else
> >+    libtool=libtool
> >+fi
> >+
> >+##########################################
> >  # Sparse probe
> >  if test "$sparse" != "no" ; then
> >    if has cgcc; then
> >@@ -3060,6 +3069,7 @@ echo "AR=$ar">>  $config_host_mak
> >  echo "OBJCOPY=$objcopy">>  $config_host_mak
> >  echo "LD=$ld">>  $config_host_mak
> >  echo "WINDRES=$windres">>  $config_host_mak
> >+echo "LIBTOOL=$libtool">>  $config_host_mak
> >  echo "CFLAGS=$CFLAGS">>  $config_host_mak
> >  echo "QEMU_CFLAGS=$QEMU_CFLAGS">>  $config_host_mak
> >  echo "QEMU_INCLUDES=$QEMU_INCLUDES">>  $config_host_mak
> >@@ -3595,7 +3605,7 @@ if [ "$source_path" != `pwd` ]; then
> >      # out of tree build
> >      mkdir -p libcacard
> >      rm -f libcacard/Makefile
> >-    ln -s "$source_path/libcacard/Makefile" libcacard/Makefile
> >+    symlink "$source_path/libcacard/Makefile" libcacard/Makefile
> >  fi
> >
> >  d=libuser
> >diff --git a/libcacard/Makefile b/libcacard/Makefile
> >index 1d34df0..3a5ad61 100644
> >--- a/libcacard/Makefile
> >+++ b/libcacard/Makefile
> >@@ -4,15 +4,45 @@
> >
> >  $(call set-vpath, $(SRC_PATH):$(SRC_PATH)/libcacard)
> >
> >-QEMU_OBJS=$(addprefix ../, $(oslib-obj-y) $(trace-obj-y) qemu-malloc.o qemu-timer-common.o)
> >+QEMU_TRACE_OBJS=$(addprefix ../,$(trace-obj-y))
> >+
> >+QEMU_BASE_OBJS=$(addprefix ../,$(oslib-obj-y) qemu-malloc.o qemu-timer-common.o)
> >+
> >+# objects linked against normal qemu binaries, not compiled with libtool
> >+QEMU_OBJS = $(QEMU_BASE_OBJS) $(QEMU_TRACE_OBJS)
> >+
> >+# objects linked into a shared library, built with libtool with -fPIC if required
> >+QEMU_BASE_OBJS_LIB=$(addsuffix .lo,$(basename $(QEMU_BASE_OBJS)))
> >+
> >+QEMU_OBJS_LIB = $(QEMU_BASE_OBJS_LIB) $(QEMU_TRACE_OBJS)
> >
> >  QEMU_CFLAGS+=-I../
> >
> >+libcacard.lib-y=$(addsuffix .lo,$(basename $(libcacard-y)))
> >+
> >  vscclient: $(libcacard-y) $(QEMU_OBJS) vscclient.o
> >-	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $(TARGET_DIR)$@")
> >+	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $@")
> >+
> >+clean:
> >+	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient libcacard.so *.lo .libs/* *.la
> >+	rm -Rf .libs
> >
> >  all: vscclient
> >
> >-clean:
> >-	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient
> >+ifeq ($(LIBTOOL),)
> >+libcacard.la:
> >+	@echo libtool is missing, please install and rerun configure
> >+
> >+install-libcacard:
> >+	@echo libtool is missing, please install and rerun configure
> >+else
> >+$(libcacard.lib-y) $(QEMU_BASE_OBJS_LIB) : %.lo: %.c
> >+	$(call quiet-command,libtool --mode=compile --quiet --tag=CC $(CC) $(QEMU_CFLAGS) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
> >+
> >+libcacard.la: $(libcacard.lib-y) $(QEMU_OBJS_LIB)
> >+	$(call quiet-command,libtool --mode=link --quiet --tag=CC $(CC) $(libcacard_libs) -lrt -rpath $(libdir) -o $@ $^,"  lt LINK $@")
> >
> >+install-libcacard: libcacard.la
> >+	$(INSTALL_DIR) "$(DESTDIR)$(libdir)"
> >+	libtool --mode=install $(INSTALL_PROG) libcacard.la "$(DESTDIR)$(libdir)"
> >+endif
> 

[Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Alon Levy]

No flag to configure is required. Instead, added a libcacard.la target that
is not built by default, only when requested explicitly via:

mkdir build
cd build
../configure
make libcacard.la
make install-libcacard

Uses libtool to do actual linking of object files and shared library, and
installing. Tested only under linux, but supposed to work on other systems as
well.

If libtool isn't found you get a message complaining about that, only at build
time (since it is not a default target I did not add a message at configure
time).

New build artifacts:
 .libs subdirectories (at <buildroot> and <buildroot>/libcacard)
 *.lo files (at same locations as the respective o files)

Added %.lo : %.c rule that uses libtool.
Updated clean rule to clean up those artifacts.
Added specific rule to call dtrace with libtool wrapper (note that because of
a current upstream dtrace bug fixed by systemtap b1568fd85 commit the -fPIC flag
isn't actually passed on. still current dtrace+libtool produced object links fine).

Tested to link and load with all tracing backends except ust (no default package
for my development computer for ust).
---
 Makefile           |   20 +++++++++++++++++++-
 Makefile.objs      |    3 +++
 configure          |   12 +++++++++++-
 libcacard/Makefile |   32 ++++++++++++++++++++++++++++----
 rules.mak          |    3 +++
 5 files changed, 64 insertions(+), 6 deletions(-)

diff --git a/Makefile b/Makefile
index 2b0438c..c71026c 100644
--- a/Makefile
+++ b/Makefile
@@ -119,6 +119,23 @@ version.o: $(SRC_PATH)/version.rc config-host.mak
 
 version-obj-$(CONFIG_WIN32) += version.o
 ######################################################################
+# Support building shared library libcacard
+
+.PHONY: libcacard.la install-libcacard
+ifeq ($(LIBTOOL),)
+libcacard.la:
+	@echo libtool is missing, please install and rerun configure
+
+install-libcacard:
+	@echo libtool is missing, please install and rerun configure
+else
+libcacard.la: $(GENERATED_HEADERS) $(oslib-obj-y) qemu-malloc.o qemu-timer-common.o $(addsuffix .lo, $(basename $(trace-obj-y)))
+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" libcacard.la,)
+
+install-libcacard: libcacard.la
+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" install-libcacard,)
+endif
+######################################################################
 
 qemu-img.o: qemu-img-cmds.h
 qemu-img.o qemu-tool.o qemu-nbd.o qemu-io.o cmd.o: $(GENERATED_HEADERS)
@@ -149,7 +166,8 @@ clean:
 # avoid old build problems by removing potentially incorrect old files
 	rm -f config.mak op-i386.h opc-i386.h gen-op-i386.h op-arm.h opc-arm.h gen-op-arm.h
 	rm -f qemu-options.def
-	rm -f *.o *.d *.a $(TOOLS) TAGS cscope.* *.pod *~ */*~
+	rm -f *.o *.d *.a *.lo $(TOOLS) TAGS cscope.* *.pod *~ */*~
+	rm -Rf .libs
 	rm -f slirp/*.o slirp/*.d audio/*.o audio/*.d block/*.o block/*.d net/*.o net/*.d fsdev/*.o fsdev/*.d ui/*.o ui/*.d
 	rm -f qemu-img-cmds.h
 	rm -f trace.c trace.h trace.c-timestamp trace.h-timestamp
diff --git a/Makefile.objs b/Makefile.objs
index 4478c61..850e707 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -344,6 +344,9 @@ trace-dtrace.dtrace-timestamp: $(SRC_PATH)/trace-events config-host.mak
 trace-dtrace.o: trace-dtrace.dtrace $(GENERATED_HEADERS)
 	$(call quiet-command,dtrace -o $@ -G -s $<, "  GEN trace-dtrace.o")
 
+trace-dtrace.lo: trace-dtrace.dtrace
+	$(call quiet-command,libtool --mode=compile --tag=CC dtrace -o $@ -G -s $<, "  lt GEN trace-dtrace.o")
+
 simpletrace.o: simpletrace.c $(GENERATED_HEADERS)
 
 ifeq ($(TRACE_BACKEND),dtrace)
diff --git a/configure b/configure
index 0627f1d..e62841e 100755
--- a/configure
+++ b/configure
@@ -1276,6 +1276,15 @@ if ! has $pkg_config; then
 fi
 
 ##########################################
+# libtool probe
+
+if ! has libtool; then
+    libtool=
+else
+    libtool=libtool
+fi
+
+##########################################
 # Sparse probe
 if test "$sparse" != "no" ; then
   if has cgcc; then
@@ -3060,6 +3069,7 @@ echo "AR=$ar" >> $config_host_mak
 echo "OBJCOPY=$objcopy" >> $config_host_mak
 echo "LD=$ld" >> $config_host_mak
 echo "WINDRES=$windres" >> $config_host_mak
+echo "LIBTOOL=$libtool" >> $config_host_mak
 echo "CFLAGS=$CFLAGS" >> $config_host_mak
 echo "QEMU_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak
 echo "QEMU_INCLUDES=$QEMU_INCLUDES" >> $config_host_mak
@@ -3595,7 +3605,7 @@ if [ "$source_path" != `pwd` ]; then
     # out of tree build
     mkdir -p libcacard
     rm -f libcacard/Makefile
-    ln -s "$source_path/libcacard/Makefile" libcacard/Makefile
+    symlink "$source_path/libcacard/Makefile" libcacard/Makefile
 fi
 
 d=libuser
diff --git a/libcacard/Makefile b/libcacard/Makefile
index 1d34df0..a35bca4 100644
--- a/libcacard/Makefile
+++ b/libcacard/Makefile
@@ -4,15 +4,39 @@
 
 $(call set-vpath, $(SRC_PATH):$(SRC_PATH)/libcacard)
 
-QEMU_OBJS=$(addprefix ../, $(oslib-obj-y) $(trace-obj-y) qemu-malloc.o qemu-timer-common.o)
+# objects linked against normal qemu binaries, not compiled with libtool
+QEMU_OBJS=$(addprefix ../,$(oslib-obj-y) qemu-malloc.o qemu-timer-common.o $(trace-obj-y))
+
+# objects linked into a shared library, built with libtool with -fPIC if required
+QEMU_OBJS_LIB=$(addsuffix .lo,$(basename $(QEMU_OBJS)))
 
 QEMU_CFLAGS+=-I../
 
+libcacard.lib-y=$(addsuffix .lo,$(basename $(libcacard-y)))
+
 vscclient: $(libcacard-y) $(QEMU_OBJS) vscclient.o
-	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $(TARGET_DIR)$@")
+	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $@")
+
+clean:
+	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient *.lo .libs/* *.la
+	rm -Rf .libs
 
 all: vscclient
 
-clean:
-	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient
+#########################################################################
+# Rules for building libcacard standalone library
+
+ifeq ($(LIBTOOL),)
+libcacard.la:
+	@echo libtool is missing, please install and rerun configure
+
+install-libcacard:
+	@echo libtool is missing, please install and rerun configure
+else
+libcacard.la: $(libcacard.lib-y) $(QEMU_OBJS_LIB)
+	$(call quiet-command,libtool --mode=link --quiet --tag=CC $(CC) $(libcacard_libs) -lrt -rpath $(libdir) -o $@ $^,"  lt LINK $@")
 
+install-libcacard: libcacard.la
+	$(INSTALL_DIR) "$(DESTDIR)$(libdir)"
+	libtool --mode=install $(INSTALL_PROG) libcacard.la "$(DESTDIR)$(libdir)"
+endif
diff --git a/rules.mak b/rules.mak
index ed59c9e..509cc01 100644
--- a/rules.mak
+++ b/rules.mak
@@ -17,6 +17,9 @@ QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
 %.o: %.c
 	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
 
+%.lo: %.c
+	$(call quiet-command,libtool --mode=compile --quiet --tag=CC $(CC) $(QEMU_CFLAGS) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
+
 %.o: %.S
 	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  AS    $(TARGET_DIR)$@")
 
-- 
1.7.5.1

Re: [Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Alon Levy]

On Tue, May 17, 2011 at 03:03:45PM +0300, Alon Levy wrote:

Forgot to mention this is the v3, with the following fixes:
 * no warning, properly use libtool to wrap dtrace (which calls gcc).
 * tested with all tracing backends but ust (and in the process of testing that)
 * moved general rule for producing .lo to rules.mak, with the exception (trace-dtrace.lo)
  in Makefile.objs (same as trace-dtrace.o rule)
 * fixed clean to remove the artifacts.

> No flag to configure is required. Instead, added a libcacard.la target that
> is not built by default, only when requested explicitly via:
> 
> mkdir build
> cd build
> ../configure
> make libcacard.la
> make install-libcacard
> 
> Uses libtool to do actual linking of object files and shared library, and
> installing. Tested only under linux, but supposed to work on other systems as
> well.
> 
> If libtool isn't found you get a message complaining about that, only at build
> time (since it is not a default target I did not add a message at configure
> time).
> 
> New build artifacts:
>  .libs subdirectories (at <buildroot> and <buildroot>/libcacard)
>  *.lo files (at same locations as the respective o files)
> 
> Added %.lo : %.c rule that uses libtool.
> Updated clean rule to clean up those artifacts.
> Added specific rule to call dtrace with libtool wrapper (note that because of
> a current upstream dtrace bug fixed by systemtap b1568fd85 commit the -fPIC flag
> isn't actually passed on. still current dtrace+libtool produced object links fine).
> 
> Tested to link and load with all tracing backends except ust (no default package
> for my development computer for ust).
> ---
>  Makefile           |   20 +++++++++++++++++++-
>  Makefile.objs      |    3 +++
>  configure          |   12 +++++++++++-
>  libcacard/Makefile |   32 ++++++++++++++++++++++++++++----
>  rules.mak          |    3 +++
>  5 files changed, 64 insertions(+), 6 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 2b0438c..c71026c 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -119,6 +119,23 @@ version.o: $(SRC_PATH)/version.rc config-host.mak
>  
>  version-obj-$(CONFIG_WIN32) += version.o
>  ######################################################################
> +# Support building shared library libcacard
> +
> +.PHONY: libcacard.la install-libcacard
> +ifeq ($(LIBTOOL),)
> +libcacard.la:
> +	@echo libtool is missing, please install and rerun configure
> +
> +install-libcacard:
> +	@echo libtool is missing, please install and rerun configure
> +else
> +libcacard.la: $(GENERATED_HEADERS) $(oslib-obj-y) qemu-malloc.o qemu-timer-common.o $(addsuffix .lo, $(basename $(trace-obj-y)))
> +	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" libcacard.la,)
> +
> +install-libcacard: libcacard.la
> +	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" install-libcacard,)
> +endif
> +######################################################################
>  
>  qemu-img.o: qemu-img-cmds.h
>  qemu-img.o qemu-tool.o qemu-nbd.o qemu-io.o cmd.o: $(GENERATED_HEADERS)
> @@ -149,7 +166,8 @@ clean:
>  # avoid old build problems by removing potentially incorrect old files
>  	rm -f config.mak op-i386.h opc-i386.h gen-op-i386.h op-arm.h opc-arm.h gen-op-arm.h
>  	rm -f qemu-options.def
> -	rm -f *.o *.d *.a $(TOOLS) TAGS cscope.* *.pod *~ */*~
> +	rm -f *.o *.d *.a *.lo $(TOOLS) TAGS cscope.* *.pod *~ */*~
> +	rm -Rf .libs
>  	rm -f slirp/*.o slirp/*.d audio/*.o audio/*.d block/*.o block/*.d net/*.o net/*.d fsdev/*.o fsdev/*.d ui/*.o ui/*.d
>  	rm -f qemu-img-cmds.h
>  	rm -f trace.c trace.h trace.c-timestamp trace.h-timestamp
> diff --git a/Makefile.objs b/Makefile.objs
> index 4478c61..850e707 100644
> --- a/Makefile.objs
> +++ b/Makefile.objs
> @@ -344,6 +344,9 @@ trace-dtrace.dtrace-timestamp: $(SRC_PATH)/trace-events config-host.mak
>  trace-dtrace.o: trace-dtrace.dtrace $(GENERATED_HEADERS)
>  	$(call quiet-command,dtrace -o $@ -G -s $<, "  GEN trace-dtrace.o")
>  
> +trace-dtrace.lo: trace-dtrace.dtrace
> +	$(call quiet-command,libtool --mode=compile --tag=CC dtrace -o $@ -G -s $<, "  lt GEN trace-dtrace.o")
> +
>  simpletrace.o: simpletrace.c $(GENERATED_HEADERS)
>  
>  ifeq ($(TRACE_BACKEND),dtrace)
> diff --git a/configure b/configure
> index 0627f1d..e62841e 100755
> --- a/configure
> +++ b/configure
> @@ -1276,6 +1276,15 @@ if ! has $pkg_config; then
>  fi
>  
>  ##########################################
> +# libtool probe
> +
> +if ! has libtool; then
> +    libtool=
> +else
> +    libtool=libtool
> +fi
> +
> +##########################################
>  # Sparse probe
>  if test "$sparse" != "no" ; then
>    if has cgcc; then
> @@ -3060,6 +3069,7 @@ echo "AR=$ar" >> $config_host_mak
>  echo "OBJCOPY=$objcopy" >> $config_host_mak
>  echo "LD=$ld" >> $config_host_mak
>  echo "WINDRES=$windres" >> $config_host_mak
> +echo "LIBTOOL=$libtool" >> $config_host_mak
>  echo "CFLAGS=$CFLAGS" >> $config_host_mak
>  echo "QEMU_CFLAGS=$QEMU_CFLAGS" >> $config_host_mak
>  echo "QEMU_INCLUDES=$QEMU_INCLUDES" >> $config_host_mak
> @@ -3595,7 +3605,7 @@ if [ "$source_path" != `pwd` ]; then
>      # out of tree build
>      mkdir -p libcacard
>      rm -f libcacard/Makefile
> -    ln -s "$source_path/libcacard/Makefile" libcacard/Makefile
> +    symlink "$source_path/libcacard/Makefile" libcacard/Makefile
>  fi
>  
>  d=libuser
> diff --git a/libcacard/Makefile b/libcacard/Makefile
> index 1d34df0..a35bca4 100644
> --- a/libcacard/Makefile
> +++ b/libcacard/Makefile
> @@ -4,15 +4,39 @@
>  
>  $(call set-vpath, $(SRC_PATH):$(SRC_PATH)/libcacard)
>  
> -QEMU_OBJS=$(addprefix ../, $(oslib-obj-y) $(trace-obj-y) qemu-malloc.o qemu-timer-common.o)
> +# objects linked against normal qemu binaries, not compiled with libtool
> +QEMU_OBJS=$(addprefix ../,$(oslib-obj-y) qemu-malloc.o qemu-timer-common.o $(trace-obj-y))
> +
> +# objects linked into a shared library, built with libtool with -fPIC if required
> +QEMU_OBJS_LIB=$(addsuffix .lo,$(basename $(QEMU_OBJS)))
>  
>  QEMU_CFLAGS+=-I../
>  
> +libcacard.lib-y=$(addsuffix .lo,$(basename $(libcacard-y)))
> +
>  vscclient: $(libcacard-y) $(QEMU_OBJS) vscclient.o
> -	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $(TARGET_DIR)$@")
> +	$(call quiet-command,$(CC) $(libcacard_libs) -lrt -o $@ $^,"  LINK  $@")
> +
> +clean:
> +	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient *.lo .libs/* *.la
> +	rm -Rf .libs
>  
>  all: vscclient
>  
> -clean:
> -	rm -f *.o */*.o *.d */*.d *.a */*.a *~ */*~ vscclient
> +#########################################################################
> +# Rules for building libcacard standalone library
> +
> +ifeq ($(LIBTOOL),)
> +libcacard.la:
> +	@echo libtool is missing, please install and rerun configure
> +
> +install-libcacard:
> +	@echo libtool is missing, please install and rerun configure
> +else
> +libcacard.la: $(libcacard.lib-y) $(QEMU_OBJS_LIB)
> +	$(call quiet-command,libtool --mode=link --quiet --tag=CC $(CC) $(libcacard_libs) -lrt -rpath $(libdir) -o $@ $^,"  lt LINK $@")
>  
> +install-libcacard: libcacard.la
> +	$(INSTALL_DIR) "$(DESTDIR)$(libdir)"
> +	libtool --mode=install $(INSTALL_PROG) libcacard.la "$(DESTDIR)$(libdir)"
> +endif
> diff --git a/rules.mak b/rules.mak
> index ed59c9e..509cc01 100644
> --- a/rules.mak
> +++ b/rules.mak
> @@ -17,6 +17,9 @@ QEMU_DGFLAGS += -MMD -MP -MT $@ -MF $(*D)/$(*F).d
>  %.o: %.c
>  	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  CC    $(TARGET_DIR)$@")
>  
> +%.lo: %.c
> +	$(call quiet-command,libtool --mode=compile --quiet --tag=CC $(CC) $(QEMU_CFLAGS) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  lt CC $@")
> +
>  %.o: %.S
>  	$(call quiet-command,$(CC) $(QEMU_CFLAGS) $(QEMU_INCLUDES) $(QEMU_DGFLAGS) $(CFLAGS) -c -o $@ $<,"  AS    $(TARGET_DIR)$@")
>  
> -- 
> 1.7.5.1
> 
> 

Re: [Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Paolo Bonzini]

On 05/18/2011 05:42 AM, Alon Levy wrote:
>>> ---
>>>   Makefile           |   20 +++++++++++++++++++-
>>>   Makefile.objs      |    3 +++
>>>   configure          |   12 +++++++++++-
>>>   libcacard/Makefile |   32 ++++++++++++++++++++++++++++----
>>>   rules.mak          |    3 +++
>>>   5 files changed, 64 insertions(+), 6 deletions(-)
>>>
>>> diff --git a/Makefile b/Makefile
>>> index 2b0438c..c71026c 100644
>>> --- a/Makefile
>>> +++ b/Makefile
>>> @@ -119,6 +119,23 @@ version.o: $(SRC_PATH)/version.rc config-host.mak
>>>
>>>   version-obj-$(CONFIG_WIN32) += version.o
>>>   ######################################################################
>>> +# Support building shared library libcacard
>>> +
>>> +.PHONY: libcacard.la install-libcacard
>>> +ifeq ($(LIBTOOL),)
>>> +libcacard.la:
>>> +	@echo libtool is missing, please install and rerun configure
>>> +
>>> +install-libcacard:
>>> +	@echo libtool is missing, please install and rerun configure
>>> +else
>>> +libcacard.la: $(GENERATED_HEADERS) $(oslib-obj-y) qemu-malloc.o qemu-timer-common.o $(addsuffix .lo, $(basename $(trace-obj-y)))
>>> +	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" libcacard.la,)
>>> +
>>> +install-libcacard: libcacard.la
>>> +	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" install-libcacard,)
>>> +endif

If you instead make the .lo rules display the error message (and add "; 
exit 1" after the echo), you can remove this ifeq.  I'll let you decide 
whether to do this or not.

Otherwise looks good, thanks!

Paolo

Re: [Qemu-devel] [PATCH] libcacard: add libcacard.la target

[Alon Levy]

On Wed, May 18, 2011 at 09:16:21AM +0200, Paolo Bonzini wrote:
> On 05/18/2011 05:42 AM, Alon Levy wrote:
> >>>---
> >>>  Makefile           |   20 +++++++++++++++++++-
> >>>  Makefile.objs      |    3 +++
> >>>  configure          |   12 +++++++++++-
> >>>  libcacard/Makefile |   32 ++++++++++++++++++++++++++++----
> >>>  rules.mak          |    3 +++
> >>>  5 files changed, 64 insertions(+), 6 deletions(-)
> >>>
> >>>diff --git a/Makefile b/Makefile
> >>>index 2b0438c..c71026c 100644
> >>>--- a/Makefile
> >>>+++ b/Makefile
> >>>@@ -119,6 +119,23 @@ version.o: $(SRC_PATH)/version.rc config-host.mak
> >>>
> >>>  version-obj-$(CONFIG_WIN32) += version.o
> >>>  ######################################################################
> >>>+# Support building shared library libcacard
> >>>+
> >>>+.PHONY: libcacard.la install-libcacard
> >>>+ifeq ($(LIBTOOL),)
> >>>+libcacard.la:
> >>>+	@echo libtool is missing, please install and rerun configure
> >>>+
> >>>+install-libcacard:
> >>>+	@echo libtool is missing, please install and rerun configure
> >>>+else
> >>>+libcacard.la: $(GENERATED_HEADERS) $(oslib-obj-y) qemu-malloc.o qemu-timer-common.o $(addsuffix .lo, $(basename $(trace-obj-y)))
> >>>+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" libcacard.la,)
> >>>+
> >>>+install-libcacard: libcacard.la
> >>>+	$(call quiet-command,$(MAKE) $(SUBDIR_MAKEFLAGS) -C libcacard V="$(V)" TARGET_DIR="$*/" install-libcacard,)
> >>>+endif
> 
> If you instead make the .lo rules display the error message (and add
> "; exit 1" after the echo), you can remove this ifeq.  I'll let you
> decide whether to do this or not.

The reason for doing the check at high level and not low level was to avoid
building any prerequisites and then find out no libtool and bail. But I think
I'll add the check at the low level too like you suggest.

> 
> Otherwise looks good, thanks!
> 
> Paolo
>