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Viewing changes to m4/ac_system_extensions.m4

  • Committer: Monty Taylor
  • Date: 2008-12-08 01:14:34 UTC
  • mto: This revision was merged to the branch mainline in revision 670.
  • Revision ID: monty@inaugust.com-20081208011434-5e5m8nwqruhap24c
Reverted gnulib changes.

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m4/ac_system_extensions.m4
 
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dnl Profive AC_USE_SYSTEM_EXTENSIONS for old autoconf machines.
 
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ifndef([AC_USE_SYSTEM_EXTENSIONS],[
 
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AC_DEFUN([AC_USE_SYSTEM_EXTENSIONS],[
 
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  AC_BEFORE([$0], [AC_COMPILE_IFELSE])
 
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  AC_BEFORE([$0], [AC_RUN_IFELSE])
 
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  AC_REQUIRE([AC_GNU_SOURCE])
 
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  AC_REQUIRE([AC_AIX])
 
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  AC_REQUIRE([AC_MINIX])
 
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  AH_VERBATIM([__EXTENSIONS__],
 
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[/* Enable extensions on Solaris.  */
 
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#ifndef __EXTENSIONS__
 
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# undef __EXTENSIONS__
 
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#endif#ifndef _POSIX_PTHREAD_SEMANTICS
 
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# undef _POSIX_PTHREAD_SEMANTICS
 
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#endif
 
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#ifndef _TANDEM_SOURCE
 
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# undef _TANDEM_SOURCE
 
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#endif])
 
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  AC_CACHE_CHECK([whether it is safe to define __EXTENSIONS__],
 
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    [ac_cv_safe_to_define___extensions__],
 
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    [AC_COMPILE_IFELSE(
 
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       [AC_LANG_PROGRAM([
 
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#         define __EXTENSIONS__ 1
 
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          AC_INCLUDES_DEFAULT])],
 
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       [ac_cv_safe_to_define___extensions__=yes],
 
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       [ac_cv_safe_to_define___extensions__=no])])
 
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  test $ac_cv_safe_to_define___extensions__ = yes &&
 
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    AC_DEFINE([__EXTENSIONS__])
 
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  AC_DEFINE([_POSIX_PTHREAD_SEMANTICS])
 
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  AC_DEFINE([_TANDEM_SOURCE])
 
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])
 
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])