[Buildroot] [RFC v1 04/14] autotools infrastructure: support out of tree build

[Thomas Petazzoni]

All autotools packages are supposed to support out of tree build, so
we mark this at the package infrastructure level, and adjust the
infrastructure to execute the configure script from the build
directory.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
---
 package/pkg-autotools.mk |   27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/package/pkg-autotools.mk b/package/pkg-autotools.mk
index 843239d..bd87253 100644
--- a/package/pkg-autotools.mk
+++ b/package/pkg-autotools.mk
@@ -78,8 +78,6 @@ ifndef $(2)_SUBDIR
  endif
 endif
 
-$(2)_SRCSUBDIR = $$($(2)_SRCDIR)/$($(2)_SUBDIR)
-
 $(2)_CONF_ENV			?=
 $(2)_CONF_OPT			?=
 $(2)_MAKE_ENV			?=
@@ -91,6 +89,7 @@ $(2)_INSTALL_TARGET_OPT		?= DESTDIR=$$(TARGET_DIR)  install
 $(2)_CLEAN_OPT			?= clean
 $(2)_UNINSTALL_STAGING_OPT	?= DESTDIR=$$(STAGING_DIR) uninstall
 $(2)_UNINSTALL_TARGET_OPT	?= DESTDIR=$$(TARGET_DIR)  uninstall
+$(2)_SUPPORTS_OUT_OF_TREE        = YES
 
 
 #
@@ -103,11 +102,11 @@ ifeq ($(5),target)
 
 # Configure package for target
 define $(2)_CONFIGURE_CMDS
-	(cd $$($$(PKG)_SRCSUBDIR) && rm -rf config.cache && \
+	(cd $$($$(PKG)_BUILDDIR) && rm -rf config.cache && \
 	$$(TARGET_CONFIGURE_OPTS) \
 	$$(TARGET_CONFIGURE_ARGS) \
 	$$($$(PKG)_CONF_ENV) \
-	./configure \
+	$$($$(PKG)_SRCDIR)/$$($$(PKG)_SUBDIR)/configure \
 		--target=$$(GNU_TARGET_NAME) \
 		--host=$$(GNU_TARGET_NAME) \
 		--build=$$(GNU_HOST_NAME) \
@@ -130,12 +129,12 @@ else
 # because it often relies on host tools which may or may not be
 # installed.
 define $(2)_CONFIGURE_CMDS
-	(cd $$($$(PKG)_SRCSUBDIR) && rm -rf config.cache; \
+	(cd $$($$(PKG)_BUILDDIR) && rm -rf config.cache; \
 	        $$(HOST_CONFIGURE_OPTS) \
 		CFLAGS="$$(HOST_CFLAGS)" \
 		LDFLAGS="$$(HOST_LDFLAGS)" \
                 $$($$(PKG)_CONF_ENV) \
-		./configure \
+		$$($$(PKG)_SRCDIR)/$$($$(PKG)_SUBDIR)/configure \
 		--prefix="$$(HOST_DIR)/usr" \
 		--sysconfdir="$$(HOST_DIR)/etc" \
 		--enable-shared --disable-static \
@@ -226,11 +225,11 @@ endif
 ifndef $(2)_BUILD_CMDS
 ifeq ($(5),target)
 define $(2)_BUILD_CMDS
-	$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) -C $$($$(PKG)_SRCSUBDIR)
+	$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 else
 define $(2)_BUILD_CMDS
-	$$(HOST_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) -C $$($$(PKG)_SRCSUBDIR)
+	$$(HOST_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_MAKE_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 endif
 endif
@@ -241,7 +240,7 @@ endif
 #
 ifndef $(2)_INSTALL_CMDS
 define $(2)_INSTALL_CMDS
-	$$(HOST_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) -C $$($$(PKG)_SRCSUBDIR) install
+	$$(HOST_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) -C $$($$(PKG)_BUILDDIR) install
 endef
 endif
 
@@ -251,7 +250,7 @@ endif
 #
 ifndef $(2)_INSTALL_STAGING_CMDS
 define $(2)_INSTALL_STAGING_CMDS
-	$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_INSTALL_STAGING_OPT) -C $$($$(PKG)_SRCSUBDIR)
+	$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_INSTALL_STAGING_OPT) -C $$($$(PKG)_BUILDDIR)
 	for i in $$$$(find $(STAGING_DIR)/usr/lib* -name "*.la"); do \
 		cp -f $$$$i $$$$i~; \
 		$$(SED) "s:\(['= ]\)/usr:\\1$(STAGING_DIR)/usr:g" $$$$i; \
@@ -265,7 +264,7 @@ endif
 #
 ifndef $(2)_INSTALL_TARGET_CMDS
 define $(2)_INSTALL_TARGET_CMDS
-	$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_INSTALL_TARGET_OPT) -C $$($$(PKG)_SRCSUBDIR)
+	$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_INSTALL_TARGET_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 endif
 
@@ -275,7 +274,7 @@ endif
 #
 ifndef $(2)_CLEAN_CMDS
 define $(2)_CLEAN_CMDS
-	-$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE)  $$($$(PKG)_CLEAN_OPT) -C $$($$(PKG)_SRCSUBDIR)
+	-$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE)  $$($$(PKG)_CLEAN_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 endif
 
@@ -285,7 +284,7 @@ endif
 #
 ifndef $(2)_UNINSTALL_STAGING_CMDS
 define $(2)_UNINSTALL_STAGING_CMDS
-	$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_UNINSTALL_STAGING_OPT) -C $$($$(PKG)_SRCSUBDIR)
+	$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) $$($$(PKG)_UNINSTALL_STAGING_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 endif
 
@@ -298,7 +297,7 @@ endif
 #
 ifndef $(2)_UNINSTALL_TARGET_CMDS
 define $(2)_UNINSTALL_TARGET_CMDS
-	$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) -k $$($$(PKG)_UNINSTALL_TARGET_OPT) -C $$($$(PKG)_SRCSUBDIR)
+	$$(TARGET_MAKE_ENV) $$($$(PKG)_MAKE_ENV) $$($$(PKG)_MAKE) -k $$($$(PKG)_UNINSTALL_TARGET_OPT) -C $$($$(PKG)_BUILDDIR)
 endef
 endif
 
-- 
1.7.9.5