[folks] build: Add --disable-fatal-warnings configure flag

[Philip Withnall <pwithnall src gnome org>]

commit 24f60323f06e7e801b8c5cb97ffda184ecfcfbc6
Author: Colin Walters <walters verbum org>
Date:   Fri Jan 20 12:24:59 2012 -0500

    build: Add --disable-fatal-warnings configure flag
    
    Useful for builders who aren't necessarily developers.

 configure.ac |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 7cd28e5..c4b6f2e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -480,7 +480,11 @@ AC_SUBST([CODE_COVERAGE_CFLAGS])
 AC_SUBST([CODE_COVERAGE_LDFLAGS])
 
 # Vala-related flags
-AS_IF([test "x$enable_vala" = "xyes"],
+AC_ARG_ENABLE([fatal-warnings],
+              AS_HELP_STRING([--disable-fatal-warnings],
+                             [Make warnings from valac and g-ir-scanner non-fatal]),
+              [enable_fatal_warnings=$enableval], [enable_fatal_warnings=yes])
+AS_IF([test "x$enable_vala" = "xyes" && test "x$enable_fatal_warnings" = "xyes"],
       [ERROR_INTROSPECTION_SCANNER_ARGS="\
                         $ERROR_INTROSPECTION_SCANNER_ARGS --warn-error"
        ERROR_VALAFLAGS="$ERROR_VALAFLAGS --fatal-warnings"])