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39 lines
1.1 KiB
Plaintext
39 lines
1.1 KiB
Plaintext
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dnl ----------------------------------------------------------------------
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dnl This whole bit snagged from libstdc++-v3.
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dnl
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dnl GCC_ENABLE
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dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING)
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dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c)
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dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER)
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dnl
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dnl See docs/html/17_intro/configury.html#enable for documentation.
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dnl
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AC_DEFUN([GCC_ENABLE],[dnl
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m4_define([_g_switch],[--enable-$1])dnl
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m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl
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AC_ARG_ENABLE($1,_g_help,
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m4_bmatch([$5],
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[^permit ],
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[[
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case "$enableval" in
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m4_bpatsubst([$5],[permit ])) ;;
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*) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;;
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dnl Idea for future: generate a URL pointing to
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dnl "onlinedocs/configopts.html#whatever"
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esac
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]],
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[^$],
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[[
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case "$enableval" in
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yes|no) ;;
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*) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;;
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esac
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]],
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[[$5]]),
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[enable_]m4_bpatsubst([$1],-,_)[=][$2])
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m4_undefine([_g_switch])dnl
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m4_undefine([_g_help])dnl
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])
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