[patch #7490] Allow overriding AX_PATH_GENERIC checks

[Vadim Zeitlin]

URL:
  <http://savannah.gnu.org/patch/?7490>

                 Summary: Allow overriding AX_PATH_GENERIC checks
                 Project: GNU Autoconf Archive
            Submitted by: zeitlin
            Submitted on: Sun 06 Mar 2011 06:41:54 PM CET
                Priority: 4
                  Status: None
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

The attached patch allows to set LIBRARY_LIBS and LIBRARY_CFLAGS variables on
configure command line or in the environment to override the normal values
returned by `library-config --libs` and `--cflags` respectively.

The patch is a bit difficult to read because of the indentation changes but
the real change is quite trivial, here it is (without the changes in the
documentation comment):

% git diff -w
diff --git a/m4/ax_path_generic.m4 b/m4/ax_path_generic.m4
index 4db2da1..809855b 100644
--- a/m4/ax_path_generic.m4
+++ b/m4/ax_path_generic.m4
@@ -75,6 +89,13 @@ AC_DEFUN([AX_PATH_GENERIC],[
   AC_ARG_VAR(UP[]_CFLAGS, [CFLAGS used for $1])
   AC_ARG_VAR(UP[]_LIBS,   [LIBS used for $1])

+  AS_IF([test x$UP[]_CFLAGS != x -o x$UP[]_LIBS != x],[
+    dnl Don't run config script at all, use user-provided values instead.
+    AC_SUBST(UP[]_CFLAGS)
+    AC_SUBST(UP[]_LIBS)
+    :
+    $4
+  ],[
   AS_IF([test x$DOWN[]_config_exec_prefix != x],[
     DOWN[]_config_args="$DOWN[]_config_args
--exec-prefix=$DOWN[]_config_exec_prefix"
     AS_IF([test x${UP[]_CONFIG+set} != xset],[
@@ -136,6 +157,7 @@ AC_DEFUN([AX_PATH_GENERIC],[
       $4
     ])
   ])
+  ])

   popdef([UP])
   popdef([DOWN])


A typical scenario in which this change could be useful is mentioned in the
comment, see also this thread
<http://thread.gmane.org/gmane.comp.programming.swig/16983>.



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File Attachments:


-------------------------------------------------------
Date: Sun 06 Mar 2011 06:41:54 PM CET  Name: ax_override_path_generic.diff 
Size: 5kB   By: zeitlin

<http://savannah.gnu.org/patch/download.php?file_id=22845>

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