Previous: AC_LIBOBJ vs LIBOBJS, Up: Autoconf 2.13   [Contents][Index]


15.6.5 AC_FOO_IFELSEÂÐAC_TRY_FOO

Autoconf 2.50°ÊÍ衤ÆâÉô¥³¡¼¥É¤Ç¤Ï¡¤°ìÊý¤Ç¤ÏAC_PREPROC_IFELSE¡¤ AC_COMPILE_IFELSE¡¤AC_LINK_IFELSE¡¤¤½¤·¤Æ AC_RUN_IFELSE¤ò»ÈÍѤ·¡¤¤â¤¦°ìÊý¤Ç¤ÏÈ¿ÂФµ¤ì¤Æ¤¤¤ë AC_TRY_CPP¡¤AC_TRY_COMPILE¡¤AC_TRY_LINK¡¤¤½¤·¤Æ AC_TRY_RUN¤ÎÂå¤ï¤ê¤ËAC_LANG_SOURCES¤È AC_LANG_PROGRAM¤ò»ÈÍѤ·¤Æ¤¤¤Þ¤¹¡¥¤½¤Îưµ¡¤Ï°Ê²¼¤Ë¤¢¤ê¤Þ¤¹¡¥

¹½Ê¸¤ÎÊѹ¹¤À¤±¤Ç¤Ê¤¯¡¤Å¯³ØÅª¤ÊÊѹ¹¤â¤Ê¤µ¤ì¤Þ¤·¤¿¡¥Àµ³Î¤µ¤ÎÂå½þ¤È¤·¤ÆÂ®ÅÙ ¤òÍѤ¤¤¿¤³¤È¤ò¶¯Ä´¤·¤Æ¤ª¤­¤Þ¤¹¤¬¡¤º£Æü¤ÎAutoconf¤Ï¡¤¥Æ¥¹¥Æ¥£¥ó¥°¥Õ¥ì¡¼¥à ¥ï¡¼¥¯¤ÎÀµ³Î¤µ¤ò¿ÊŸ¤µ¤»¤Æ¤¤¤Æ¡¤¤¦¡Á¤ó…®ÅÙ¤ÎÂå½þ¤Ë¤Ê¤Ã¤Æ¤¤¤Þ¤¹¡¥

¤Ê¤µ¤ì¤Æ¤Ï¤¤¤Ê¤¤´°Á´¤ÊÎã¤È¤·¤Æ¡¤¥Ø¥Ã¥À¥Õ¥¡¥¤¥ë¤¬¡¤·¿¡¤¹½Â¤ÂΡ¤¹½ ¤ÂΤΥá¥ó¥Ð¡¼¡¤¤Þ¤¿¤Ï´Ø¿ô¤È¤¤¤Ã¤¿ÆÃÄê¤ÎÀë¸À¤ò´Þ¤ó¤Ç¤¤¤ë¤«¤É¤¦¤«¤òÄ´¤Ù¤ë ÊýË¡¤¬°Ê²¼¤Ë¤¢¤ê¤Þ¤¹¡¥¥Ø¥Ã¥À¥Õ¥¡¥¤¥ë¤ÇľÀÜgrep¤ò¼Â¹Ô¤¹¤ëÂå¤ï¤ê¤Ë¡¤ AC_EGREP_HEADER¤ò»ÈÍѤ·¤Æ¤¯¤À¤µ¤¤¡¥Ä´ºº¤·¤Æ¤¤¤ë‘#include’ °Ê ³°¤Î¥Ø¥Ã¥À¥Õ¥¡¥¤¥ë¤Ç¥·¥ó¥Ü¥ë¤òÄêµÁ¤·¤Æ¤¤¤ë¥·¥¹¥Æ¥à¤â¤¢¤ë¤Ç¤·¤ç¤¦¡¥

(°­¤¤)Îã¤È¤·¤Æ¡¤¥·¥ó¥Ü¥ë¤¬¡¤¥Ø¥Ã¥À¥Õ¥¡¥¤¥ë¤ÇÄêµÁ¤µ¤ì¤Æ¤¤¤ë¤«¡¤¤Þ¤¿¤ÏC ¥× ¥ê¥×¥í¥»¥Ã¥µ¤ÇÄêµÁ¤µ¤ì¤Æ¤¤¤ë¤«¤ò¡¤C¥×¥ê¥×¥í¥»¥Ã¥µ¤òÄ´ºº¤¹¤Ù¤­¤Ç¤Ï¤Ê¤¤Íý ͳ¤¬¤Ï°Ê²¼¤Ë¤¢¤ê¤Þ¤¹¡¥

AC_EGREP_CPP(yes,
[#ifdef _AIX
  yes
#endif
], is_aix=yes, is_aix=no)

¾åµ­¤ÎÎã¤Ç¤Ï¡¤Å¬Àڤ˽ñ¤«¤ì¤Æ¤¤¤ë(i)AC_LANG_PROGRAM¤ò»ÈÍѤ·¡¤(ii) ¥³¥ó¥Ñ¥¤¥é¤ò¼Â¹Ô¤¹¤Ù¤­¤Ç¤¹¡¥

AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
[[#if !defined _AIX
# error _AIX not defined
#endif
]])],
                   [is_aix=yes],
                   [is_aix=no])