[gnome-boxes] Add --debug configure option to set Vala & C debug flags

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit d732b9420e7e8a0844a5c10859779b4f914efca6
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Tue Jul 3 03:47:57 2012 +0300

    Add --debug configure option to set Vala & C debug flags
    
    https://bugzilla.gnome.org/show_bug.cgi?id=679293

 autogen.sh      |    2 +-
 configure.ac    |   11 +++++++++++
 src/Makefile.am |    1 +
 3 files changed, 13 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index 33aca92..a9d2730 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -9,5 +9,5 @@ autoreconf -v --force --install
 intltoolize -f
 
 if [ -z "$NOCONFIGURE" ]; then
-    "$srcdir"/configure --enable-maintainer-mode --enable-vala ${1+"$@"}
+    "$srcdir"/configure --enable-maintainer-mode --enable-vala --enable-debug ${1+"$@"}
 fi
diff --git a/configure.ac b/configure.ac
index 6853ebc..829100f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -96,6 +96,17 @@ AC_ARG_ENABLE([strict-cc],
 AS_IF([test "x$enable_strict_cc" = "xyes"], [CFLAGS="$CFLAGS -Wall -Werror"],
       [CFLAGS="$CFLAGS -w"])
 
+dnl Debugging
+AC_ARG_ENABLE(debug,
+	AS_HELP_STRING([--enable-debug],[enable debugging]),,
+        enable_debug=no)
+if test "x$enable_debug" = "xyes"; then
+        CFLAGS="$CFLAGS -O0 -ggdb3"
+        VALA_DEBUG_FLAGS="-g"
+fi
+
+AC_SUBST(VALA_DEBUG_FLAGS)
+
 dnl Distribute logos?
 AC_ARG_ENABLE([logos],
               AS_HELP_STRING([--enable-logos],
diff --git a/src/Makefile.am b/src/Makefile.am
index cdeb9b0..324179c 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -27,6 +27,7 @@ AM_VALAFLAGS =						\
 	--pkg posix					\
 	--pkg spice-client-gtk-3.0			\
 	--pkg tracker-sparql-0.14			\
+	$(VALA_DEBUG_FLAGS)			        \
 	$(NULL)
 
 bin_PROGRAMS = gnome-boxes