1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
# ===========================================================================
# http://autoconf-archive.cryp.to/_ac_c_ifdef.html
# ===========================================================================
#
# SYNOPSIS
#
# _AC_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 Courts <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.
AC_DEFUN([_AC_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])])
|
