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author | Peter Simons <simons@cryp.to> | 2007-02-18 23:43:16 +0100 |
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committer | Peter Simons <simons@cryp.to> | 2007-02-18 23:43:16 +0100 |
commit | 16aee45643e593e2833e4dff19df7b5f14267a79 (patch) | |
tree | ba40c1ee401bbbcec7dbee5e3bb51d21c70db130 /m4/ax_check_define.m4 | |
download | autoconf-archive-16aee45643e593e2833e4dff19df7b5f14267a79.tar.gz |
Imported http://autoconf-archive.cryp.to/ release 2007-02-14.
Diffstat (limited to 'm4/ax_check_define.m4')
-rw-r--r-- | m4/ax_check_define.m4 | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/m4/ax_check_define.m4 b/m4/ax_check_define.m4 new file mode 100644 index 0000000..4be7b9e --- /dev/null +++ b/m4/ax_check_define.m4 @@ -0,0 +1,94 @@ +##### http://autoconf-archive.cryp.to/ax_check_define.html +# +# SYNOPSIS +# +# AC_CHECK_DEFINE([symbol], [ACTION-IF-FOUND], [ACTION-IF-NOT]) +# AX_CHECK_DEFINE([includes],[symbol], [ACTION-IF-FOUND], [ACTION-IF-NOT]) +# +# DESCRIPTION +# +# Complements AC_CHECK_FUNC but it does not check for a function but +# for a define to exist. Consider a usage like: +# +# AC_CHECK_DEFINE(__STRICT_ANSI__, CFLAGS="$CFLAGS -D_XOPEN_SOURCE=500") +# +# LAST MODIFICATION +# +# 2006-10-13 +# +# COPYLEFT +# +# Copyright (c) 2006 Guido U. Draheim <guidod@gmx.de> +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation; either version 2 of the +# License, or (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA +# 02111-1307, USA. +# +# As a special exception, the respective Autoconf Macro's copyright +# owner gives unlimited permission to copy, distribute and modify the +# configure scripts that are the output of Autoconf when processing +# the Macro. You need not follow the terms of the GNU General Public +# License when using or distributing such scripts, even though +# portions of the text of the Macro appear in them. The GNU General +# Public License (GPL) does govern all other use of the material that +# constitutes the Autoconf Macro. +# +# This special exception to the GPL applies to versions of the +# Autoconf Macro released by the Autoconf Macro Archive. When you +# make and distribute a modified version of the Autoconf Macro, you +# may extend this special exception to the GPL to apply to your +# modified version as well. + +AC_DEFUN([AC_CHECK_DEFINED],[ +AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$1])dnl +AC_CACHE_CHECK([for $1 defined], ac_var, +AC_TRY_COMPILE(,[ + #ifdef $1 + int ok; + #else + choke me + #endif +],AS_VAR_SET(ac_var, yes),AS_VAR_SET(ac_var, no))) +AS_IF([test AS_VAR_GET(ac_var) != "no"], [$2], [$3])dnl +AS_VAR_POPDEF([ac_var])dnl +]) + +AC_DEFUN([AX_CHECK_DEFINED],[ +AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$2])dnl +AC_CACHE_CHECK([for $1 defined], ac_var, +AC_TRY_COMPILE($1,[ + #ifndef $2 + int ok; + #else + choke me + #endif +],AS_VAR_SET(ac_var, yes),AS_VAR_SET(ac_var, no))) +AS_IF([test AS_VAR_GET(ac_var) != "no"], [$3], [$4])dnl +AS_VAR_POPDEF([ac_var])dnl +]) + +AC_DEFUN([AX_CHECK_FUNC], +[AS_VAR_PUSHDEF([ac_var], [ac_cv_func_$2])dnl +AC_CACHE_CHECK([for $2], ac_var, +dnl AC_LANG_FUNC_LINK_TRY +[AC_LINK_IFELSE([AC_LANG_PROGRAM([$1 + #undef $2 + char $2 ();],[ + char (*f) () = $2; + return f != $2; ])], + [AS_VAR_SET(ac_var, yes)], + [AS_VAR_SET(ac_var, no)])]) +AS_IF([test AS_VAR_GET(ac_var) = yes], [$3], [$4])dnl +AS_VAR_POPDEF([ac_var])dnl +])# AC_CHECK_FUNC |