33 lines
1.0 KiB
Plaintext
33 lines
1.0 KiB
Plaintext
# AM_CONDITIONAL -*- Autoconf -*-
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# Copyright (C) 1997-2013 Free Software Foundation, Inc.
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#
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# AM_CONDITIONAL(NAME, SHELL-CONDITION)
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# -------------------------------------
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# Define a conditional.
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AC_DEFUN([AM_CONDITIONAL],
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[AC_PREREQ([2.52])dnl
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m4_if([$1], [TRUE], [AC_FATAL([$0: invalid condition: $1])],
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[$1], [FALSE], [AC_FATAL([$0: invalid condition: $1])])dnl
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AC_SUBST([$1_TRUE])dnl
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AC_SUBST([$1_FALSE])dnl
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_AM_SUBST_NOTMAKE([$1_TRUE])dnl
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_AM_SUBST_NOTMAKE([$1_FALSE])dnl
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m4_define([_AM_COND_VALUE_$1], [$2])dnl
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if $2; then
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$1_TRUE=
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$1_FALSE='#'
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else
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$1_TRUE='#'
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$1_FALSE=
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fi
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AC_CONFIG_COMMANDS_PRE(
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[if test -z "${$1_TRUE}" && test -z "${$1_FALSE}"; then
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AC_MSG_ERROR([[conditional "$1" was never defined.
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Usually this means the macro was only invoked conditionally.]])
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fi])])
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