[json-glib] build: Allow m4 substitution for conditional defaults

[Emmanuele Bassi <ebassi src gnome org>]

commit c296ca9ed06b8e4b54a4bd8003593b3a98b94f6b
Author: Emmanuele Bassi <ebassi linux intel com>
Date:   Tue Jul 5 14:22:13 2011 +0100

    build: Allow m4 substitution for conditional defaults
    
    To compensate for AC_HELP_STRING()'s braindamage.

 configure.ac |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5b2e2e5..add5302 100644
--- a/configure.ac
+++ b/configure.ac
@@ -95,7 +95,7 @@ m4_define([debug_default], [m4_if(m4_eval(json_minor_version % 2), [1], [yes], [
 
 AC_ARG_ENABLE([debug],
               [AC_HELP_STRING([--enable-debug=@<:@no/minimum/yes@:>@],
-                              [turn on debugging @<:@default=debug_default@:>@])],
+                              [turn on debugging @<:@default=]debug_default[@:>@])],
               [],
               [enable_debug=debug_default])
 
@@ -128,7 +128,7 @@ dnl = Enable strict compiler flags ============================================
 m4_define([maintainer_flags_default], [m4_if(m4_eval(json_minor_version % 2), [1], [yes], [no])])
 AC_ARG_ENABLE([maintainer-flags],
               [AC_HELP_STRING([--enable-maintainer-flags=@<:@no/yes@:>@],
-                              [Use strict compiler flags @<:@default=maintainer_flags_default@:>@])],
+                              [Use strict compiler flags @<:@default=]maintainer_flags_default[@:>@])],
               [],
               [enable_maintainer_flags=maintainer_flags_default])