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12.3 ¥Ø¥ë¥×ʸ»úÎó¤ò¾®´ñÎï¤Ë¤¹¤ë

AC_ARG_WITH (see External Software)¤ÈAC_ARG_ENABLE (see Package Options)¤Ç»ÈÍѤ¹¤ë‘help strings’¤òÀµ¤·¤¯½ñ¼°²½¤¹¤ë ¤³¤È¤ËÄ©À路¤Æ¤ß¤Þ¤·¤ç¤¦¡¥¶ñÂÎŪ¤Ë¤Ï¡¤ÆÈ¼«¤Î‘help strings’¤ò¡¤É¸½à Ū¤ÊAutoconf¤Î‘help strings’¤Î¤è¤¦¤Ë¡¤‘configure --help’ ¤ÇÎó ¤ËŬÀÚ¤Ëʤ֤褦¤Ë¤·¤¿¤¤¤È»×¤¦¤Ç¤·¤ç¤¦¡¥AS_HELP_STRING¥Þ¥¯¥í¤ÎÌÜ Åª¤Ï¤³¤³¤Ë¤¢¤ê¤Þ¤¹¡¥

Macro: AS_HELP_STRING (left-hand-side, right-hand-side)

¥æ¡¼¥¶¤¬‘configure --help’¤ò¼Â¹Ô¤·¤¿¤È¤­¡¤¾®´ñÎï¤Ê¥Ø¥ë¥×ʸ»úÎó¤ËŸ ³«¤·¤Þ¤¹¡¥Ä̾ï¤Ï¡¤AC_ARG_WITH (see External Software)¤ä AC_ARG_ENABLE (see Package Options)¤Ç»ÈÍѤ·¤Þ¤¹¡¥°Ê²¼¤ÎÎã¤Ç¤è ¤êʬ¤«¤ê°×¤¯¤Ê¤ë¤Ç¤·¤ç¤¦¡¥

AC_DEFUN([TEST_MACRO],
[AC_ARG_WITH([foo],
             AS_HELP_STRING([--with-foo],
                            [use foo (default is NO)]),
             [ac_cv_use_foo=$withval], [ac_cv_use_foo=no])
AC_CACHE_CHECK([whether to use foo],
               [ac_cv_use_foo], [ac_cv_use_foo=no])])

AS_HELP_STRING¤Î¸Æ¤Ó½Ð¤·¤Ï°úÍÑÉä¤Ç°Ï¤Þ¤Ê¤¤¤³¤È¤ËÃí°Õ¤·¤Æ ¤¯¤À¤µ¤¤¡¥‘configure --help’¤ÎºÇ¸å¤Î¿ô¹Ô¤Ë¡¤°Ê²¼¤Î¤è¤¦¤Ê¹Ô¤¬¸½¤ì¤Þ ¤¹¡¥

--enable and --with options recognized:
  --with-foo              use foo (default is NO)

AS_HELP_STRING¥Þ¥¯¥í¤Ï¡¤°Ê²¼¤ÎÎã¤Î¤è¤¦¤Ë¡¤left-hand-side ¤½ ¤·¤Æ/¤Þ¤¿¤Ïright-hand-side¤¬¥Þ¥¯¥í°ú¿ô¤Ç¹½À®¤µ¤ì¤ë»þ¡¤ÆÃ¤ËÌò¤ËΩ¤Á ¤Þ¤¹¡¥

AC_DEFUN(MY_ARG_WITH,
[AC_ARG_WITH([$1],
             AS_HELP_STRING([--with-$1], [use $1 (default is $2)]),
             ac_cv_use_$1=$withval, ac_cv_use_$1=no),
AC_CACHE_CHECK(whether to use $1, ac_cv_use_$1, ac_cv_use_$1=$2)])