[vala/staging] build: Add --enable-debug configure option

[Rico Tzschichholz <ricotz src gnome org>]

commit 90b0ae52fca51b2b34b53bf1723d5ee1c82bd75d
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Thu Nov 22 14:14:28 2018 +0100

    build: Add --enable-debug configure option

 configure.ac | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/configure.ac b/configure.ac
index a10cf4b19..40ee02a14 100644
--- a/configure.ac
+++ b/configure.ac
@@ -82,6 +82,12 @@ if test x$enable_boostrap = xyes; then
        VALAFLAGS="$VALAFLAGS --hide-internal --abi-stability"
 fi
 
+AC_ARG_ENABLE(debug, AS_HELP_STRING([--enable-debug], [Enable debug build]), enable_debug=$enableval, 
enable_debug=no)
+if test "$enable_coverage" = "yes"; then
+       VALAFLAGS="$VALAFLAGS -g"
+       CFLAGS="$CFLAGS -g -O0"
+fi
+
 AC_SUBST(VALAFLAGS)
 AC_SUBST(CFLAGS)
 AC_SUBST(CPPFLAGS)