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5.6.3 °ìÈÌŪ¤Ê¥Ø¥Ã¥À¤ÎÄ´ºº

¤³¤ì¤é¤Î¥Þ¥¯¥í¤Ï¡¤“ÆÃÄê¤Î”¥Æ¥¹¥È¥Þ¥¯¥í¤Ç¥«¥Ð¡¼¤µ¤ì¤Æ¤¤¤Ê¤¤¡¤¥·¥¹¥Æ¥à¥Ø¥Ã ¥À¥Õ¥¡¥¤¥ë¤ò¸«¤Ä¤±¤ë¤¿¤á¤Ë»ÈÍѤµ¤ì¤Þ¤¹¡¥¤½¤Î¸ºß¤ò¸«¤Ä¤±¤ë¤À¤±¤Ç¤Ê¤¯¡¤¥Ø¥Ã ¥À¤ÎÆâÍÆ¤òÄ´ºº¤¹¤ëɬÍפ¬¤¢¤ë¾ì¹ç¡¤¤½¤Î¤¿¤á¤ËÆÈ¼«¤Î¥Æ¥¹¥È¤ò½ñ¤¯É¬Íפ¬¤¢¤ê ¤Þ¤¹(see Writing Tests)¡¥

Macro: AC_CHECK_HEADER (header-file, [action-if-found], [action-if-not-found], [includes = ‘default-includes])

¥·¥¹¥Æ¥à¥Ø¥Ã¥À¥Õ¥¡¥¤¥ëheader-file¤¬¥³¥ó¥Ñ¥¤¥ë²Äǽ¤Ê¾ì¹ç¡¤¥·¥§¥ë¥³ ¥Þ¥ó¥Éaction-if-found¤ò¡¤¤½¤ì°Ê³°¤Ç¤Ïaction-if-not-found ¤ò ¼Â¹Ô¤·¤Þ¤¹¡¥¥Ø¥Ã¥À¥Õ¥¡¥¤¥ë¤¬ÍøÍѲÄǽ¤Ê¾ì¹ç¤Ç¡¤¥·¥ó¥Ü¥ë¤òÄêµÁ¤·¤¿¤¤¤À¤±¤Î ¾ì¹ç¤Ï¡¤Âå¤ï¤ê¤Ë¡¤AC_CHECK_HEADERS¤ò»ÈÍѤò¹Í¤¨¤Æ¤ß¤Æ¤¯¤À¤µ¤¤¡¥

¸Å¤¤¥Ð¡¼¥¸¥ç¥ó¤ÎAutoconf¤È¤Î¸ß´¹À­¤ÎÌäÂê¤Ï¡¤°Ê²¼¤òÆÉ¤ó¤Ç¤¯¤À¤µ¤¤¡¥

Macro: AC_CHECK_HEADERS (header-file…, [action-if-found], [action-if-not-found], [includes = ‘default-includes])

¶õÇò¤Ç¶èÀÚ¤é¤ì¤¿°ú¿ô¤Î¥ê¥¹¥È¤ÇÍ¿¤¨¤é¤ì¤Æ¤¤¤ë¥·¥¹¥Æ¥à¥Ø¥Ã¥À¥Õ¥¡¥¤¥ë header-file¤¬Â¸ºß¤·¤Æ¤¤¤ë¤â¤Î¤ËÂФ·¡¤HAVE_header-file ¤ò(Á´¤ÆÂçʸ»ú¤Ç)ÄêµÁ¤·¤Þ¤¹¡¥action-if-found¤¬Í¿¤¨¤é¤ì¤Æ¤¤¤ë¾ì¹ç¡¤ ¤½¤ì¤Ï¥Ø¥Ã¥À¥Õ¥¡¥¤¥ë¤Î°ì¤Ä¤¬¸«¤Ä¤«¤Ã¤¿¤È¤­¤Ë¼Â¹Ô¤¹¤ëÄɲäΥ·¥§¥ë¥³¡¼¥É¤Ë ¤Ê¤ê¤Þ¤¹¡¥ºÇ½é¤Ë°ìÃפ·¤¿¥ë¡¼¥×¤Ç¥Ö¥ì¥¤¥¯¤¹¤ë¤¿¤á¤Ë‘break’¤òÍ¿¤¨¤ë¤³ ¤È¤¬²Äǽ¤Ç¤¹¡¥ action-if-not-found¤¬Í¿¤¨¤é¤ì¤Æ¤¤¤ë¾ì¹ç¡¤¥Ø¥Ã¥À¥Õ¥¡ ¥¤¥ë¤¬°ì¤Ä¤Ç¤â¸«¤Ä¤«¤é¤Ê¤¤¤È¤­¼Â¹Ô¤µ¤ì¤Þ¤¹¡¥

¸Å¤¤¥Ð¡¼¥¸¥ç¥ó¤ÎAutoconf¤È¤Î¸ß´¹À­¤ÎÌäÂê¤Ï¡¤°Ê²¼¤òÆÉ¤ó¤Ç¤¯¤À¤µ¤¤¡¥

°ÊÁ°¤Î¥Ð¡¼¥¸¥ç¥ó¤ÎAutoconf¤Ï¡¤¥Ø¥Ã¥À¤¬¥×¥ê¥×¥í¥»¥Ã¥µ¤ËŬ¹ç¤·¤Æ¤¤¤ë¤«¤É¤¦ ¤«¤ò¡¤Ã±½ã¤ËÄ´ºº¤·¤Æ¤¤¤Þ¤·¤¿¡¥¸Å¤¤¥Æ¥¹¥È¤Ï¡¤ÂåɽŪ¤Ê»ÈÍѤËÂФ·¤ÆÉÔŬÀÚ¤Ç ¤¢¤ë¤¿¤áÊѹ¹¤µ¤ì¤Þ¤·¤¿¡¥¥Ø¥Ã¥À¤ÏÄ̾拾¥ó¥Ñ¥¤¥ë¤Ç»ÈÍѤµ¤ì¡¤¥×¥ê¥×¥í¥»¥¹¤Ç ¤ÏÌÇ¿¤Ë»ÈÍѤµ¤ì¤Þ¤»¤ó¤·¡¤¸Å¤¤Æ°ºî¤Ç¤Ï¡¤¥³¥ó¥Ñ¥¤¥ë»þ¤Ë¤À¤á¤Ë¤Ê¤ë¥Ø¥Ã¥À¤ò ¼õ¤±Æþ¤ì¤ë¤³¤È¤â¤¢¤ê¤Þ¤·¤¿¡¥¥Ø¥Ã¥À¤¬¥×¥ê¥×¥í¥»¥¹²Äǽ¤«¤É¤¦¤«¤òÄ´ºº¤¹¤ëɬ Íפ¬¤¢¤ë¾ì¹ç¡¤AC_PREPROC_IFELSE¤ò»ÈÍѤ¹¤ë¤³¤È¤¬²Äǽ¤Ç¤¹ (see Running the Preprocessor)¡¥

¤³¤Î¥Æ¥¹¥È¤ÎÂÑÀ­¤ò¹â¤á¤ë¼êË¡¤Ï¡¤header-file¤ÎÁ°¤Ë¥¤¥ó¥¯¥ë¡¼¥É¤¹¤ë ɬÍפ¬¤¢¤ë¥Ø¥Ã¥À¤¬¡¤includes¤Ë¤¢¤ë¤³¤È¤âÍ׵ᤷ¤Þ¤¹(see Default Includes)¡¥foo.h¤¬Â¸ºß¤¹¤ë¾ì¹ç¡¤¤½¤ÎÁ°¤Ç¥¤¥ó¥¯¥ë¡¼¥É¤µ¤ì¤ëɬÍפ¬ ¤¢¤ëbar.h¤òõ¤¹¾ì¹ç¡¤°Ê²¼¤Î¼êË¡¤òÄ󰯤·¤Þ¤¹¡¥

AC_CHECK_HEADERS([foo.h])
AC_CHECK_HEADERS([bar.h], [], [],
[#if HAVE_FOO_H
# include <foo.h>
# endif
])