[Mesa-dev] [PATCH 1/2] configure: Keep track of user compiler/linker flags, but don't restore

[Dan Nicholson]

Since mesa occasionally alters the users's compiler and linker flags, it's
useful to keep track of their original settings so the user's intentions are
respected. However, since mesa may alter the variables with settings required
for the build, they should not be restored to their original settings.

Signed-off-by: Dan Nicholson <dbn.lists at gmail.com>
---
 configure.ac |   21 +++++++++------------
 1 files changed, 9 insertions(+), 12 deletions(-)

diff --git a/configure.ac b/configure.ac
index 1414ce8..eebfef8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -17,6 +17,15 @@ dnl http://people.gnome.org/~walters/docs/build-api.txt
 dnl We don't support srcdir != builddir.
 echo \#buildapi-variable-no-builddir >/dev/null
 
+dnl Keep track of user's compiler/linker flags so we know their original
+dnl settings in case we need to alter the variables.
+_USER_CFLAGS=$CFLAGS
+_USER_CXXFLAGS=$CXXFLAGS
+_USER_CFLAGS_FOR_BUILD=$CFLAGS_FOR_BUILD
+_USER_CXXFLAGS_FOR_BUILD=$CXXFLAGS_FOR_BUILD
+_USER_LDFLAGS=$LDFLAGS
+_USER_CPPFLAGS=$CPPFLAGS
+
 # Support silent build rules, requires at least automake-1.11. Disable
 # by either passing --disable-silent-rules to configure or passing V=1
 # to make
@@ -153,10 +162,6 @@ dnl LIB_DIR - library basename
 LIB_DIR=`echo $libdir | $SED 's%.*/%%'`
 AC_SUBST([LIB_DIR])
 
-dnl Cache LDFLAGS and CPPFLAGS so we can add to them and restore later
-_SAVE_LDFLAGS="$LDFLAGS"
-_SAVE_CPPFLAGS="$CPPFLAGS"
-
 dnl build host compiler macros
 DEFINES_FOR_BUILD=""
 AC_SUBST([DEFINES_FOR_BUILD])
@@ -1962,14 +1967,6 @@ AM_CONDITIONAL(HAVE_SPARC_ASM, echo "$DEFINES" | grep 'SPARC_ASM' >/dev/null 2>&
 dnl prepend CORE_DIRS to SRC_DIRS
 SRC_DIRS="$CORE_DIRS $SRC_DIRS"
 
-dnl Restore LDFLAGS and CPPFLAGS
-LDFLAGS="$_SAVE_LDFLAGS"
-CPPFLAGS="$_SAVE_CPPFLAGS"
-
-dnl Add user CFLAGS and CXXFLAGS
-CFLAGS="$CFLAGS $USER_CFLAGS"
-CXXFLAGS="$CXXFLAGS $USER_CXXFLAGS"
-
 dnl Substitute the config
 AC_CONFIG_FILES([configs/current
 		Makefile
-- 
1.7.7.6