autoconf warnings (AC_AIX, ...)

Hi folks,

while regenerating the autoconf files, I get bunch of warnings:
(but ./configure is created nevertheless) warning: AC_COMPILE_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS
../../lib/autoconf/specific.m4:389: AC_USE_SYSTEM_EXTENSIONS is expanded from...
aclocal.m4:2977: gl_LOCK_EARLY_BODY is expanded from...
aclocal.m4:2970: gl_LOCK_EARLY is expanded from...
aclocal.m4:3201: gl_LOCK is expanded from...
aclocal.m4:1639: gt_INTL_SUBDIR_CORE is expanded from...
aclocal.m4:1478: AM_INTL_SUBDIR is expanded from...
aclocal.m4:451: AM_GNU_GETTEXT is expanded from... the top level warning: AC_RUN_IFELSE was called before AC_USE_SYSTEM_EXTENSIONS warning: AC_COMPILE_IFELSE was called before AC_GNU_SOURCE
../../lib/autoconf/specific.m4:331: AC_GNU_SOURCE is expanded from... warning: AC_RUN_IFELSE was called before AC_GNU_SOURCE

A little research on the net showed up that it might have something
to do w/ target-specific macros like AC_AIX or AC_MINIX, AC_GNU_SOURCE,
which are now obsolete, instead it's suggest to use AC_USE_SYSTEM_EXTENSIONS gnu org/2008-08/msg00015.html

in makes the warning go away.

 Enrico Weigelt    ==   metux IT service -
 Please visit the OpenSource QM Taskforce:
 Patches / Fixes for a lot dozens of packages in dozens of versions:

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