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build: sanitize environment for AC_CHECK_LIB

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Compiling with -Wl,--as-needed can cause the check for
gbm_bo_get_stride() to wrongly fail. Sanitize the environment further,
assuring that unneeded compiler flags are not involved in the conftest.

Signed-off-by: Dave Reisner <dreisner@archlinux.org>
Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This commit is contained in:
Dave Reisner 2012-10-06 18:28:18 -04:00 committed by David Herrmann
parent 7e4e25fcd2
commit 0aa54a0a98
1 changed files with 5 additions and 2 deletions
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7
configure.ac
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@ -478,8 +478,10 @@ AM_CONDITIONAL([BUILD_ENABLE_GLES2], [test x$gles2_enabled = xyes])
if test x$have_gbm = xyes ; then
save_CFLAGS="$CFLAGS"
save_LIBS="$LIBS"
CFLAGS="$CFLAGS $GBM_CFLAGS $DRM_CFLAGS"
LIBS="$LIBS $GBM_LIBS $DRM_LIBS"
save_LDFLAGS="$LDFLAGS"
CFLAGS="$DRM_CFLAGS $GBM_CFLAGS"
LIBS="$DRM_LIBS $GBM_LIBS"
LDFLAGS=""
AC_CHECK_LIB([gbm],
[gbm_bo_get_stride],
[AC_DEFINE([BUILD_HAVE_GBM_BO_GET_STRIDE],
@ -487,6 +489,7 @@ if test x$have_gbm = xyes ; then
[Define to 1 if your libgbm provides gbm_bo_get_stride])])
CFLAGS="$save_CFLAGS"
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
fi
#