15.2 acconfig.h

config.h.in¤òÀ¸À®¤¹¤ë¤¿¤á¡¤autoheader¤Ï¤½¤ì¤¾¤ì¤Î¥·¥ó¥Ü ¥ë¤ËÂФ¹¤ë¥Æ¥ó¥×¥ì¡¼¥È¤ò¹½ÃÛ¤·¤¿¤êõ¤·¤¿¤ê¤¹¤ëɬÍפ¬¤¢¤ê¤Þ¤·¤¿¡¥¸½ºß¤Î Autoconf¤Î¥ê¥ê¡¼¥¹¤Ç¤Ï¡¤AH_VERBATIM¤ÈAH_TEMPLATE¤ò»ÈÍѤ·¤Þ ¤¹¤¬(see Autoheader Macros)¡¤¸Å¤¤¥ê¥ê¡¼¥¹¤Ç¤Ï¡¤¥Õ¥¡¥¤¥ë acconfig.h¤ËɬÍפʥƥó¥×¥ì¡¼¥È¤Î¥ê¥¹¥È¤ò´Þ¤á¤Æ¤¤¤Þ¤·¤¿¡¥ autoheader¤Ï¡¤¥³¥á¥ó¥È¤È#define¤È#undef¤Îʸ¤ò¡¤ acconfig.h ¤¬¥«¥ì¥ó¥È¥Ç¥£¥ì¥¯¥È¥ê¤Ë¸ºß¤¹¤ë¾ì¹ç¤Ï¤½¤³¤«¤é¥³¥Ô¡¼¤· ¤Þ¤¹¡¥ÄɲäΥ·¥ó¥Ü¥ë¤òAC_DEFINE¤¹¤ë¾ì¹ç¡¤¤³¤Î¥Õ¥¡¥¤¥ë¤ò»ÈÍѤ¹¤ëɬ Íפ¬¤¢¤ê¤Þ¤·¤¿¡¥

config.h.in¤Ë¾ðÊó¤òÁ°ÃÖ/¸åÃÖ¤·¤¿¤¤¾ì¹ç¡¤¸½ºß¤ÎAutoconf¤Î¥ê¥ê¡¼¥¹ ¤Ç¤â¡¤AH_TOP¤ÈAH_BOTTOM¤òÄ󶡤·¤Æ¤¤¤Þ¤¹¡¥ÀΤΥС¼¥¸¥ç¥ó¤Î Autoconf¤Ë¤Ï¤è¤¯»÷¤¿µ¡Ç½¤¬¤¢¤ê¤Þ¤·¤¿¡¥./acconfig.h¤Ëʸ»úÎó ‘@TOP@’¤¬´Þ¤Þ¤ì¤Æ¤¤¤ë¾ì¹ç¡¤autoheader¤Ï‘@TOP@’ ¤¬´Þ¤Þ¤ì¤Æ¤¤¤ë¹Ô¤ÎÁ°¤Î¹Ô¤òÀ¸À®¤¹¤ë¥Õ¥¡¥¤¥ë¤ÎÀèƬ¤Ë¥³¥Ô¡¼¤·¤Þ¤¹¡¥Æ±Íͤˡ¤ ./acconfig.h¤Ëʸ»úÎó‘@BOTTOM@’¤¬´Þ¤Þ¤ì¤Æ¤¤¤ë¾ì¹ç¡¤ autoheader¤Ï¤½¤Î¹Ô¤Î¸å¤Î¹Ô¤òÀ¸À®¤¹¤ë¥Õ¥¡¥¤¥ë¤ÎËöÈø¤Ë¥³¥Ô¡¼¤·¤Þ ¤¹¡¥¤³¤ì¤é¤Îʸ»úÎó¤Î¤¤¤º¤ì¤«¤Þ¤¿¤ÏξÊý¤È¤â¾Êά¤Ç¤­¤Þ¤¹¡¥¸Å¤¤¥Ð¡¼¥¸¥ç¥ó¤Î Autoconf¤ÇƱ¤¸¸ú²Ì¤òÀ¸À®¤¹¤ë¤¿¤á¤Î¡¤¤µ¤é¤Ë¸Å¤¤ÂåÂØÊýË¡¤Ï¡¤¥«¥ì¥ó¥È¥Ç¥£¥ì ¥¯¥È¥ê¤Ë¥Õ¥¡¥¤¥ëfile.top(Ä̾ï¤Ïconfig.h.top) ¤ä file.bot¤òºîÀ®¤¹¤ë¤³¤È¤Ç¤¹¡¥¤½¤ì¤é¤¬Â¸ºß¤¹¤ë¾ì¹ç¡¤ autoheader¤Ï¤½¤Î½ÐÎϤκǽé¤È½ª¤ê¤Ë¡¤¤½¤ì¤¾¤ì¤½¤ÎÆâÍƤò¥³¥Ô¡¼¤· ¤Þ¤¹¡¥

°ÊÁ°¤Î¥Ð¡¼¥¸¥ç¥ó¤ÎAutoconf¤Ç¤Ï¡¤ÇÛÉÛ¤¹¤ë¥½¥Õ¥È¥¦¥¨¥¢¥Ñ¥Ã¥±¡¼¥¸¤Î½àÈ÷¤Ç»È ÍѤ¹¤ë¥Õ¥¡¥¤¥ë¤Ï°Ê²¼¤Î¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤Þ¤¹¡¥

configure.ac --.   .------> autoconf* -----> configure
               +---+
[aclocal.m4] --+   `---.
[acsite.m4] ---'       |
                       +--> [autoheader*] -> [config.h.in]
[acconfig.h] ----.     |
                 +-----'
[config.h.top] --+
[config.h.bot] --'

AH_¥Þ¥¯¥í¤À¤±¤ò»ÈÍѤ¹¤ëºÝ¤Ï¡¤configure.ac¤Ï¼«¸ÊÆ⢷¿¤Ë¤¹ ¤Ù¤­¤Ç¡¤¤½¤·¤Æ¡¤acconfig.hÅù¤Ë°Í¸¤¹¤Ù¤­¤Ç¤Ï¤¢¤ê¤Þ¤»¤ó¡¥