[Buildroot] [PATCH 04/12] autotools: introduce $(PKG_NAME)_AUTORECONF_ENV/$(PKG_NAME)_AUTORECONF_OPT variables

[llandwerlin at gmail.com <llandwerlin@gmail.com>]

From: Lionel Landwerlin <llandwerlin@gmail.com>

Rather than defining the AUTORECONF variable containing the path to
the autoreconf tool + all its arguments, we split the variable in two.
There is now :
      - AUTORECONF which contains the path to the autoreconf tool,
      - $(PKG_NAME)_AUTORECONF_OPT which contains the autoreconf arguments,

      - and we add $(PKG_NAME)_AUTORECONF_ENV which contains the autoreconf
        environment variables.

This allow us to define a specific setup to run autoreconf for both
target and host as well as per package if needed.

Signed-off-by: Lionel Landwerlin <llandwerlin@gmail.com>
---
 docs/buildroot.html           |   35 +++++++++++++++++++++++++++--------
 package/Makefile.autotools.in |   19 ++++++++++++++++++-
 package/autoconf/autoconf.mk  |    2 +-
 package/automake/automake.mk  |    5 +++--
 4 files changed, 49 insertions(+), 12 deletions(-)

diff --git a/docs/buildroot.html b/docs/buildroot.html
index 00808ff..814198b 100644
--- a/docs/buildroot.html
+++ b/docs/buildroot.html
@@ -1253,15 +1253,34 @@ LIBFOO_POST_PATCH_HOOKS += LIBFOO_POST_PATCH_FIXUP
       pass to make in the build step. These are passed after the
       <code>make</code> command. By default, empty.</li>
 
-      <li><code>LIBFOO_AUTORECONF</code>, tells whether the package should
-      be autoreconfigured or not (i.e, if the configure script and
-      Makefile.in files should be re-generated by re-running autoconf,
-      automake, libtool, etc.). Valid values are <code>YES</code> and
-      <code>NO</code>. By default, the value is <code>NO</code></li>
-
-      <li><code>LIBFOO_AUTORECONF_OPT</code> to specify additional options
+      <li><code>LIBFOO_AUTORECONF</code>, tells whether the package
+      should be autoreconfigured or not (i.e, if the configure script
+      and Makefile.in files should be re-generated by re-running
+      autoconf, automake, libtool, etc.). Valid values
+      are <code>YES</code> and <code>NO</code>. By default, the value
+      is <code>NO</code></li>
+
+      <li><code>LIBFOO_AUTORECONF_OPT</code> to specify additional
+      options passed to the <i>autoreconf</i> program
+      if <code>LIBFOO_AUTORECONF=YES</code>. By default, empty.</li>
+
+      <li><code>LIBFOO_AUTORECONF_ENV</code>, to specify environment
+      variables to pass to <i>autoreconf</i> program if
+      <code>LIBFOO_AUTORECONF=YES</code>. By default, it depends
+      whether we're building a package for the host or target, but it
+      should always define the following variables :
+      <ul>
+        <li>ACLOCAL</li>
+        <li>AUTOCONF</li>
+        <li>AUTOHEADER</li>
+        <li>AUTOMAKE</li>
+        <li>LIBTOOLIZE</li>
+      </ul></li>
+
+      <li><code>LIBFOO_AUTORECONF_OPT</code>, to specify options
       passed to the <i>autoreconf</i> program if
-      <code>LIBFOO_AUTORECONF=YES</code>. By default, empty.</li>
+      <code>LIBFOO_AUTORECONF=YES</code>. By default, <code>-f -i -I
+      "$(ACLOCAL_DIR)"</code>.</li>
 
       <li><code>LIBFOO_LIBTOOL_PATCH</code> tells whether the Buildroot
       patch to fix libtool cross-compilation issues should be applied or
diff --git a/package/Makefile.autotools.in b/package/Makefile.autotools.in
index b24c2b1..4a992d9 100644
--- a/package/Makefile.autotools.in
+++ b/package/Makefile.autotools.in
@@ -62,8 +62,25 @@ $(2)_CONF_OPT			?=
 $(2)_MAKE			?= $(MAKE)
 $(2)_MAKE_ENV			?=
 $(2)_MAKE_OPT			?=
+ifeq ($(5),host)
 $(2)_AUTORECONF			?= NO
-$(2)_AUTORECONF_OPT		?=
+$(2)_AUTORECONF_OPT		?= -f -i -I "$$(ACLOCAL_HOST_DIR)"
+$(2)_AUTORECONF_ENV		?= $$(HOST_CONFIGURE_OPTS) \
+				ACLOCAL="$$(ACLOCAL)" \
+				AUTOCONF="$$(AUTOCONF)" \
+				AUTOHEADER="$$(AUTOHEADER)" \
+				AUTOMAKE="$$(AUTOMAKE)" \
+				LIBTOOLIZE="$$(LIBTOOLIZE)"
+else
+$(2)_AUTORECONF			?= YES
+$(2)_AUTORECONF_OPT		?= -f -i -I "$$(ACLOCAL_STAGING_DIR)"
+$(2)_AUTORECONF_ENV		?= $$(TARGET_CONFIGURE_OPTS) \
+				ACLOCAL="$$(ACLOCAL)" \
+				AUTOCONF="$$(AUTOCONF)" \
+				AUTOHEADER="$$(AUTOHEADER)" \
+				AUTOMAKE="$$(AUTOMAKE)" \
+				LIBTOOLIZE="$$(LIBTOOLIZE)"
+endif
 $(2)_USE_CONFIG_CACHE           ?= $(if $(BR2_CONFIG_CACHE),YES,NO)
 $(2)_INSTALL_STAGING_OPT	?= DESTDIR=$$(STAGING_DIR) install
 $(2)_INSTALL_TARGET_OPT		?= DESTDIR=$$(TARGET_DIR)  install
diff --git a/package/autoconf/autoconf.mk b/package/autoconf/autoconf.mk
index a21192f..4b58986 100644
--- a/package/autoconf/autoconf.mk
+++ b/package/autoconf/autoconf.mk
@@ -23,4 +23,4 @@ $(eval $(call AUTOTARGETS,package,autoconf,host))
 # variables used by other packages
 AUTOCONF:=$(HOST_DIR)/usr/bin/autoconf
 AUTOHEADER:=$(HOST_DIR)/usr/bin/autoheader
-AUTORECONF=$(HOST_CONFIGURE_OPTS) ACLOCAL="$(ACLOCAL)" AUTOCONF="$(AUTOCONF)" AUTOHEADER="$(AUTOHEADER)" AUTOMAKE="$(AUTOMAKE)" $(HOST_DIR)/usr/bin/autoreconf -f -i -I "$(ACLOCAL_DIR)"
+AUTORECONF=$(HOST_DIR)/usr/bin/autoreconf
diff --git a/package/automake/automake.mk b/package/automake/automake.mk
index a33c9f4..1d198f4 100644
--- a/package/automake/automake.mk
+++ b/package/automake/automake.mk
@@ -22,5 +22,6 @@ $(eval $(call AUTOTARGETS,package,automake,host))
 
 # variables used by other packages
 AUTOMAKE = $(HOST_DIR)/usr/bin/automake
-ACLOCAL_DIR = $(STAGING_DIR)/usr/share/aclocal
-ACLOCAL = $(HOST_DIR)/usr/bin/aclocal -I $(ACLOCAL_DIR)
+ACLOCAL_STAGING_DIR = $(STAGING_DIR)/usr/share/aclocal
+ACLOCAL_HOST_DIR = $(HOST_DIR)/usr/share/aclocal
+ACLOCAL = $(HOST_DIR)/usr/bin/aclocal
-- 
1.7.2.3