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[patch] lib/autoconf/specific.m4: turn AC_ISC_POSIX into a NOP

From: Adrian Bunk
Subject: [patch] lib/autoconf/specific.m4: turn AC_ISC_POSIX into a NOP
Date: Sat, 7 Apr 2012 23:09:07 +0300
User-agent: Mutt/1.5.21 (2010-09-15)

The platform that needed it saw it's last release in 1998,
is completely unsupported since 2006, and it was already
documented that new programs need not use AC_ISC_POSIX.

The main objective of this change is that without it autoupdate
turned AC_ISC_POSIX into AC_SEARCH_LIBS([strerror],[cposix])
in, keeping this zombie alive forever.
 doc/autoconf.texi        |    5 ++---
 lib/autoconf/specific.m4 |    2 +-
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/doc/autoconf.texi b/doc/autoconf.texi
index 2ae8bb9..a4f6666 100644
--- a/doc/autoconf.texi
+++ b/doc/autoconf.texi
@@ -23411,11 +23411,10 @@ See @ref{AC_FUNC_GETMNTENT} and @ref{AC_CHECK_LIB}.
 @defmac AC_ISC_POSIX
 @ovindex LIBS
-This macro adds @option{-lcposix} to output variable @code{LIBS} if
+This macro added @option{-lcposix} to output variable @code{LIBS} if
 necessary for Posix facilities.  Sun dropped support for the obsolete
 INTERACTIVE Systems Corporation Unix on 2006-07-23.  New programs
-need not use this macro.  It is implemented as
address@hidden([strerror], [cposix])} (@pxref{AC_SEARCH_LIBS}).
+need not use this macro.  Since autoconf 2.69 it does nothing.
 @end defmac
 @defmac AC_LANG_C
diff --git a/lib/autoconf/specific.m4 b/lib/autoconf/specific.m4
index 7d6be57..18a6b52 100644
--- a/lib/autoconf/specific.m4
+++ b/lib/autoconf/specific.m4
 # ------------
-AU_DEFUN([AC_ISC_POSIX], [AC_SEARCH_LIBS([strerror], [cposix])])

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