[giggle] configure.ac: Add a option to enable strict compilation warnings (-Werror)

[Javier JardÃn <jjardon src gnome org>]

commit 2f6ef6050a5bf69daebe7e980eadc01071d7a5f9
Author: Javier JardÃn <jjardon gnome org>
Date:   Tue Oct 18 19:08:52 2011 +0100

    configure.ac: Add a option to enable strict compilation warnings (-Werror)

 configure.ac |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d43cd35..0ed07ee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -159,6 +159,15 @@ else
 fi
 
 dnl ---------------------------------------------------------------------------
+dnl - Enable strict warnings (-Werror) (disabled by default)
+dnl ---------------------------------------------------------------------------
+AC_ARG_ENABLE([strict],
+              [AS_HELP_STRING([--enable-strict],
+                              [Enable strict compilation warnings '-Werror'])])
+AS_IF([test "x$enable_strict" = "xyes"],
+      [CPPFLAGS="$CPPFLAGS -Werror"])
+
+dnl ---------------------------------------------------------------------------
 dnl - Extra verbose warning switches
 dnl ---------------------------------------------------------------------------