r22441: Add automatic dependency tracking. The dependency generation is
[jerry/samba.git] / source / m4 / cond.m4
1 # AM_CONDITIONAL                                            -*- Autoconf -*-
2
3 # Copyright (C) 1997, 2000, 2001, 2003, 2004, 2005, 2006
4 # Free Software Foundation, Inc.
5 #
6 # This file is free software; the Free Software Foundation
7 # gives unlimited permission to copy and/or distribute it,
8 # with or without modifications, as long as this notice is preserved.
9
10 # serial 8
11
12 # AM_CONDITIONAL(NAME, SHELL-CONDITION)
13 # -------------------------------------
14 # Define a conditional.
15 AC_DEFUN([AM_CONDITIONAL],
16 [AC_PREREQ(2.52)dnl
17  ifelse([$1], [TRUE],  [AC_FATAL([$0: invalid condition: $1])],
18         [$1], [FALSE], [AC_FATAL([$0: invalid condition: $1])])dnl
19 AC_SUBST([$1_TRUE])dnl
20 AC_SUBST([$1_FALSE])dnl
21 _AM_SUBST_NOTMAKE([$1_TRUE])dnl
22 _AM_SUBST_NOTMAKE([$1_FALSE])dnl
23 if $2; then
24   $1_TRUE=
25   $1_FALSE='#'
26 else
27   $1_TRUE='#'
28   $1_FALSE=
29 fi
30 AC_CONFIG_COMMANDS_PRE(
31 [if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then
32   AC_MSG_ERROR([[conditional "$1" was never defined.
33 Usually this means the macro was only invoked conditionally.]])
34 fi])])