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# ===========================================================================
# http://www.gnu.org/software/autoconf-archive/ax_c_ifdef.html
# ===========================================================================
#
# OBSOLETE MACRO
#
# Deprecated in favor of the standard Autoconf macro AC_CHECK_DECL.
#
# SYNOPSIS
#
# AX_C_IFDEF(MACRO-NAME, ACTION-IF-DEF, ACTION-IF-NOT-DEF)
#
# DESCRIPTION
#
# Check for the definition of macro MACRO-NAME using the current
# language's compiler.
#
# LICENSE
#
# Copyright (c) 2008 Ludovic Courtes <ludo@chbouib.org>
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 6
AU_ALIAS([_AC_C_IFDEF], [AX_C_IFDEF])
AC_DEFUN([AX_C_IFDEF],
[AC_COMPILE_IFELSE([#ifndef $1
# error "Macro $1 is undefined!"
/* For some compilers (eg. SGI's CC), #error is not
enough... */
please, do fail
#endif],
[$2], [$3])])
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