| 1 | dnl ---------------------------------------------------------------------- |
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| 2 | dnl This whole bit snagged from libstdc++-v3. |
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| 3 | |
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| 4 | dnl |
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| 5 | dnl GCC_ENABLE |
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| 6 | dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) |
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| 7 | dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) |
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| 8 | dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) |
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| 9 | dnl |
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| 10 | dnl See docs/html/17_intro/configury.html#enable for documentation. |
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| 11 | dnl |
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| 12 | AC_DEFUN([GCC_ENABLE],[dnl |
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| 13 | m4_define([_g_switch],[--enable-$1])dnl |
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| 14 | m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl |
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| 15 | AC_ARG_ENABLE($1,_g_help, |
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| 16 | m4_bmatch([$5], |
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| 17 | [^permit ], |
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| 18 | [[ |
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| 19 | case "$enableval" in |
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| 20 | m4_bpatsubst([$5],[permit ])) ;; |
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| 21 | *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; |
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| 22 | dnl Idea for future: generate a URL pointing to |
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| 23 | dnl "onlinedocs/configopts.html#whatever" |
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| 24 | esac |
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| 25 | ]], |
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| 26 | [^$], |
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| 27 | [[ |
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| 28 | case "$enableval" in |
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| 29 | yes|no) ;; |
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| 30 | *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; |
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| 31 | esac |
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| 32 | ]], |
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| 33 | [[$5]]), |
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| 34 | [enable_]m4_bpatsubst([$1],-,_)[=][$2]) |
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| 35 | m4_undefine([_g_switch])dnl |
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| 36 | m4_undefine([_g_help])dnl |
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| 37 | ]) |
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| 38 | |
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