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ejcoumans
2006-05-25 19:18:29 +00:00
commit e061ec1ebf
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mk/autoconf/qualify.m4 Normal file
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# qualify.m4 -*- Autoconf -*-
#==============================================================================
# Copyright (C)2005 by Eric Sunshine <sunshine@sunshineco.com>
#
# This library is free software; you can redistribute it and/or modify it
# under the terms of the GNU Library General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This library 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 Library General Public
# License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with this library; if not, write to the Free Software Foundation,
# Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
#==============================================================================
AC_PREREQ([2.56])
#------------------------------------------------------------------------------
# CS_SYMBOL_QUALIFIER(MESSAGE, CACHE-VAR, QUALIFIERS, [SYMBOL], [LANG],
# [ACTION-IF-ACCEPTED], [ACTION-IF-NOT-ACCEPTED])
# Test if a symbol can be qualified by one of the elements of the
# comma-separated list of QUALIFIERS. Examples of qualifiers include
# __attribute__((deprecated)), __declspec(dllimport), etc. MESSAGE is the
# "checking" message. CACHE-VAR is the variable which receives the
# qualifier which succeeded, or the the literal "no" if none were
# accepted. SYMBOL is the symbol to which the qualifier should be
# applied. If omitted, then SYMBOL defaults to "void f();". LANG is the
# language of the test, typically "C" or "C++". It defaults to "C" if
# omitted. ACTION-IF-ACCEPTED is invoked after CACHE-VAR is set if one of
# the qualifiers is accepted, else ACTION-IF-NOT-ACCEPTED is invoked.
#------------------------------------------------------------------------------
AC_DEFUN([CS_SYMBOL_QUALIFIER],
[AC_CACHE_CHECK([$1], [$2],
[$2='no'
m4_foreach([cs_symbol_qualifier], [$3],
[AS_IF([test "$$2" = no],
[CS_BUILD_IFELSE(
[AC_LANG_PROGRAM(
[cs_symbol_qualifier m4_default([$4],[void f()]);],
[])],
[], [$5], [$2='cs_symbol_qualifier'], [$2='no'])])])])
AS_IF([test $$2 != no], [$6], [$7])])