1 dnl ---------------------------------------------------------------------- 2 dnl This whole bit snagged from libstdc++-v3. 3 4 dnl 5 dnl GCC_ENABLE 6 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) 7 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) 8 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) 9 dnl 10 dnl See docs/html/17_intro/configury.html#enable for documentation. 11 dnl 12 AC_DEFUN([GCC_ENABLE],[dnl 13 m4_define([_g_switch],[--enable-$1])dnl 14 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl 15 AC_ARG_ENABLE($1,_g_help, 16 m4_bmatch([$5], 17 [^permit ], 18 [[ 19 case "$enableval" in 20 m4_bpatsubst([$5],[permit ])) ;; 21 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; 22 dnl Idea for future: generate a URL pointing to 23 dnl "onlinedocs/configopts.html#whatever" 24 esac 25 ]], 26 [^$], 27 [[ 28 case "$enableval" in 29 yes|no) ;; 30 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; 31 esac 32 ]], 33 [[$5]]), 34 [enable_]m4_bpatsubst([$1],-,_)[=][$2]) 35 m4_undefine([_g_switch])dnl 36 m4_undefine([_g_help])dnl 37 ]) 38 39
