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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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