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15.6.1 °úÍÑÉä¤Ç°Ï¤à¤³¤È¤ÎÊѹ¹

¾Ò²ð¤¹¤Ù¤­ºÇ¤â½ÅÍפÊÊѹ¹¤Ç¤¹¡¥¤Û¤È¤ó¤É¤Î¥Þ¥¯¥í¤Î¼ÂÁõ¤Ï´°Á´¤ËÊѹ¹¤µ¤ì¤Þ¤· ¤¿¡¥¥³¡¼¥É¤Îʬ²ò¡¤¥¨¥é¡¼¥á¥Ã¥»¡¼¥¸¤Î²þÁ±¡¤¥æ¡¼¥¶¥¤¥ó¥¿¡¼¥Õ¥§¡¼¥¹¤Î°ì´ÓÀ­ ¤Ê¤É¤¬¡¤¤³¤Î¤³¤È¤Ç²Äǽ¤Ë¤Ê¤ê¤Þ¤·¤¿¡¥»Äǰ¤Ê¤¬¤éÉûºîÍѤȤ·¤Æ¡¤¤³¤ì¤Þ¤Ç(´ñ À×Ū¤Ë)ưºî¤·¤Æ¤¤¤¿¹½À®Êª¤Ë¤Ï¡¤Autoconf 2.50¤Ç¤ª¤«¤·¤¯¤Ê¤ê»Ï¤á¤ë¤â¤Î¤â¤¢ ¤ê¤Þ¤¹¡¥

Î㤨¤Ð¡¤°Ê²¼¤ÎÎã¤Ç¤Ï¡¤¥á¥Ã¥»¡¼¥¸¤¬Å¬Àڤ˰úÍÑÉä¤Ç°Ï¤Þ¤ì¤Æ¤¤¤Þ¤»¤ó¡¥

AC_INIT
AC_CHECK_HEADERS(foo.h,,
AC_MSG_ERROR(cannot find foo.h, bailing out))
AC_OUTPUT

Autoconf 2.13¤Ï¡¤Ã±½ã¤Ë¤½¤ì¤ò̵»ë¤·¤Æ¤¤¤Þ¤·¤¿¡¥

$ autoconf-2.13; ./configure --silent
creating cache ./config.cache
configure: error: cannot find foo.h
$

¤·¤«¤·Autoconf 2.50¤Ç¤Ï¡¤²õ¤ì¤¿configure¤òÀ¸À®¤·¤Þ¤¹¡¥

$ autoconf-2.50; ./configure --silent
configure: error: cannot find foo.h
./configure: exit: bad non-numeric arg `bailing'
./configure: exit: bad non-numeric arg `bailing'
$

¥á¥Ã¥»¡¼¥¸¤Ï°úÍÑÉä¤Ç°Ï¤àɬÍפ¬¤¢¤ê¡¤AC_MSG_ERROR¤Î¸Æ¤Ó½Ð¤·¤â¤½¤¦ ¤Ç¤¹¡ª

AC_INIT
AC_CHECK_HEADERS(foo.h,,
                 [AC_MSG_ERROR([cannot find foo.h, bailing out])])
AC_OUTPUT

¿¤¯¤Î¿¤¯¤Î(¤¤¤¯¤é¤Ç¤â³¤±¤¿¤¤)Autoconf¥Þ¥¯¥í¤Ë¤Ï…¾¯¤Ê¤¯¤È¤â AC_DEFUN¼«¿È¤â´Þ¤á¤Æ¡¤Å¬ÀڤʰúÍÑÉ䤬¤¢¤ê¤Þ¤»¤ó¤Ç¤·¤¿¡ª

$ cat configure.in
AC_DEFUN([AC_PROG_INSTALL],
[# My own much better version
])
AC_INIT
AC_PROG_INSTALL
AC_OUTPUT
$ autoconf-2.13
autoconf: Undefined macros:
***BUG in Autoconf--please report*** AC_FD_MSG
***BUG in Autoconf--please report*** AC_EPI
configure.in:1:AC_DEFUN([AC_PROG_INSTALL],
configure.in:5:AC_PROG_INSTALL
$ autoconf-2.50
$