[vala] vala.m4: honour CC, CPPFLAGS, CFLAGS, LDFLAGS

[Ryan Lortie <desrt src gnome org>]

commit bd1ec7117a8acbf1f4acb163a82a10aacc7ac89f
Author: Ryan Lortie <desrt desrt ca>
Date:   Tue Feb 11 15:34:04 2014 -0500

    vala.m4: honour CC, CPPFLAGS, CFLAGS, LDFLAGS
    
    These variables may be set to values that are required to build
    executables.  Make sure we honour them from vala.m4 when attempting to
    check for packages.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=724176

 vala.m4 |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/vala.m4 b/vala.m4
index 79c32a1..4fc0740 100644
--- a/vala.m4
+++ b/vala.m4
@@ -29,7 +29,7 @@ AC_DEFUN([_VALA_CHECK_COMPILE_WITH_ARGS],
 void main(){}
 _ACEOF
 
-  AS_IF([vala_error=`$VALAC $1 -q -o conftest$ac_exeext conftest.vala 2>&1`],
+  AS_IF([vala_error=`$VALAC $1 -q --cc="${CC} ${CPPFLAGS} ${CFLAGS} ${LDFLAGS}" -o conftest$ac_exeext 
conftest.vala 2>&1`],
         [$2], [$3])
 ])