[evolution-data-server] Put compiler warning flags in AM_CPPFLAGS instead of CFLAGS.

[Matthew Barnes <mbarnes src gnome org>]

commit fe8d93143f06b001dd0084624433f036cc4f22b4
Author: Matthew Barnes <mbarnes redhat com>
Date:   Fri Oct 23 23:19:57 2009 -0400

    Put compiler warning flags in AM_CPPFLAGS instead of CFLAGS.

 configure.ac |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index cf1ca3f..c979534 100644
--- a/configure.ac
+++ b/configure.ac
@@ -161,7 +161,6 @@ AS_COMPILER_FLAGS(WARNING_FLAGS,
 	-Wmissing-declarations -Wmissing-include-dirs
 	-Wmissing-noreturn -Wnested-externs -Wpointer-arith
 	-Wredundant-decls -Wundef -Wwrite-strings")
-AC_SUBST(WARNING_FLAGS)
 
 dnl Other useful compiler warnings for test builds only.
 dnl These may produce warnings we have no control over.
@@ -169,7 +168,9 @@ dnl
 dnl	-Wformat-nonliteral
 dnl	-Wmissing-format-attribute
 dnl	-Wshadow
-CFLAGS="$CFLAGS $WARNING_FLAGS"
+
+AM_CPPFLAGS="$WARNING_FLAGS"
+AC_SUBST(AM_CPPFLAGS)
 
 dnl ******************************
 dnl Initialize maintainer mode