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