| 1 | # AM_CONDITIONAL -*- Autoconf -*-
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| 2 |
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| 3 | # Copyright 1997, 2000, 2001 Free Software Foundation, Inc.
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| 4 |
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| 5 | # This program is free software; you can redistribute it and/or modify
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| 6 | # it under the terms of the GNU General Public License as published by
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| 7 | # the Free Software Foundation; either version 2, or (at your option)
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| 8 | # any later version.
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| 9 |
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| 10 | # This program is distributed in the hope that it will be useful,
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| 11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | # GNU General Public License for more details.
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| 14 |
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| 15 | # You should have received a copy of the GNU General Public License
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| 16 | # along with this program; if not, write to the Free Software
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| 17 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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| 18 | # 02111-1307, USA.
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| 19 |
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| 20 | # serial 5
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| 21 |
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| 22 | AC_PREREQ(2.52)
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| 23 |
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| 24 | # AM_CONDITIONAL(NAME, SHELL-CONDITION)
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| 25 | # -------------------------------------
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| 26 | # Define a conditional.
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| 27 | AC_DEFUN([AM_CONDITIONAL],
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| 28 | [ifelse([$1], [TRUE], [AC_FATAL([$0: invalid condition: $1])],
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| 29 | [$1], [FALSE], [AC_FATAL([$0: invalid condition: $1])])dnl
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| 30 | AC_SUBST([$1_TRUE])
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| 31 | AC_SUBST([$1_FALSE])
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| 32 | if $2; then
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| 33 | $1_TRUE=
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| 34 | $1_FALSE='#'
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| 35 | else
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| 36 | $1_TRUE='#'
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| 37 | $1_FALSE=
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| 38 | fi
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| 39 | AC_CONFIG_COMMANDS_PRE(
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| 40 | [if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then
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| 41 | AC_MSG_ERROR([conditional "$1" was never defined.
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| 42 | Usually this means the macro was only invoked conditionally.])
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| 43 | fi])])
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