[PATCH] AC_REQUIRE: include FAQ URL when warning about duplicate expansion

[Mike Frysinger]

Signed-off-by: Mike Frysinger <address@hidden>

2011-07-11  Mike Frysinger  <address@hidden>

        * lib/m4sugar/m4sugar.m4 (_m4_require_check): Add URL to warning.
---
 lib/m4sugar/m4sugar.m4 |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/lib/m4sugar/m4sugar.m4 b/lib/m4sugar/m4sugar.m4
index 00f1f4a..ac012e7 100644
--- a/lib/m4sugar/m4sugar.m4
+++ b/lib/m4sugar/m4sugar.m4
@@ -2100,7 +2100,8 @@ m4_provide_if([$1], [m4_set_remove([_m4_provide], [$1])],
 m4_define([_m4_require_check],
 [m4_if(_m4_defn([_m4_diverting]), [$2], [m4_ignore],
        m4_ifdef([_m4_diverting([$2])], [-]), [-], [m4_warn([syntax],
-   [$3: `$1' was expanded before it was required])_m4_require_call],
+   [$3: `$1' was expanded before it was required
+http://www.gnu.org/software/autoconf/manual/autoconf.html#Expanded-Before-Required])_m4_require_call],
        [m4_ignore])])
 
 
-- 
1.7.6