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8.1.6 °úÍÑÉä¤Î·Ð¸³Â§

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AC_TRY_LINK(
changequote(<<, >>)dnl
<<#include <time.h>
#ifndef tzname /* For SGI.  */
extern char *tzname[]; /* RS6000 and others reject char **tzname.  */
#endif>>,
changequote([, ])dnl
[atoi (*tzname);], ac_cv_var_tzname=yes, ac_cv_var_tzname=no)

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AC_TRY_LINK(
[#include <time.h>
#ifndef tzname /* For SGI.  */
extern char *tzname[]; /* RS6000 and others reject char **tzname.  */
#endif],
            [atoi (*tzname);],
            [ac_cv_var_tzname=yes],
            [ac_cv_var_tzname=no])

M4¤Ë¿Æ¤·¤ó¤Ç¤¤¤ëÆÉ¼Ô¤Ï¡¤M4¤¬°ú¿ô¤ò¤Þ¤È¤á¤ë(collect)¤È¤­¤Ë ‘changequote(<<, >>)’¤È‘<<’ ‘>>’¤ÎξÊý¤ò°û¤ß¹þ¤à¤Î¤Ç¡¤¤³ ¤ì¤éÆó¤Ä¤ÎÎ㤬¸·Ì©¤ËÅù²Á¤Ç¤¢¤ë¤³¤È¤ËÃí°Õ¤·¤Æ¤¯¤À¤µ¤¤¡¥¤³¤ì¤é¤Î°úÍÑÉä¤Ï°ú ¿ô¤Î°ìÉô¤Ç¤Ï¤¢¤ê¤Þ¤»¤ó¡ª

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changequote(<<, >>)dnl
<<[]>>
changequote([, ])dnl

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[[]]

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AC_LINK_IFELSE([AC_LANG_PROGRAM(
[[#include <time.h>
#ifndef tzname /* For SGI.  */
extern char *tzname[]; /* RS6000 and others reject char **tzname.  */
#endif]],
                                [atoi (*tzname);])],
               [ac_cv_var_tzname=yes],
               [ac_cv_var_tzname=no])

°úÍÑÉ䤬½½Ê¬¤Ç¤Ê¤¤¾õ¶·¤Ç˾¤ß¤¬¤Ê¤¯¤Ê¤Ã¤¿¾ì¹ç¤É¤¦¤¹¤ì¤Ð¤¤¤¤¤«¤È¤¤¤¦¤³¤È¤Ë ¤Ä¤¤¤Æ¤Ï¡¤See Quadrigraphs.

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