ruby-dev

福間@福岡 です。

FreeBSDで日本語localeを使う場合にリンクする必要があった libxpg4 ですが、
最近 libc 本体に統合されて不要になりました。

ただ、いまのところ互換性のためにダミーの libxpg4.{a,so*} (中身は空っぽ)が
残っているため、configureで

  AC_CHECK_LIB(xpg4, setlocale)	# FreeBSD needs this

これに引っかかって(libcに入っている setlocale() を発見してしまう)無駄に
リンクしてしまいます。実害はほとんど無いのですが、この対策です。

# 本当は
#  AC_CHECK_FUNC(_EUC_init,, AC_CHECK_LIB(xpg4, _EUC_init))
# 程度でもいいんだけど、内部構造におもいっきり依存してしまうので。

# FreeBSD以外で -lxpg4 しないと駄目な環境って無いですよね?

---
 FUKUMA Yasuhiro (福間 康弘) as Yasu.F @ Kitakyushu.Fukuoka.Japan
 Web site: http://www.bsdclub.org/~yasuf/
 PGP fingerprint = 17 25 8A F3 99 E5 7E 19  C0 EA 6E 03 8A C3 CE F0
 “いちばん苦手な言語は、日本語です。”

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configure.in.diff (1.35 KB, text/x-diff)

Fri Jun 16 05:18:45 2000  Yasuhiro Fukuma  <yasuf@bsdclub.org>

	* configure.in: FreeBSD: do not link dummy libxpg4 which was
	  merged into libc.

Index: configure.in
===================================================================
RCS file: /usr/local/cvs/repositories/netlab/ruby/configure.in,v
retrieving revision 1.33
diff -u -r1.33 configure.in
--- configure.in	2000/06/14 05:15:08	1.33
+++ configure.in	2000/06/15 20:18:45
@@ -168,14 +168,29 @@
 		ac_cv_header_sys_select_h=no
 		ac_cv_header_sys_times_h=no;;
 os2_emx*)	LIBS="-lm $LIBS"
-		ac_cv_lib_xpg4_setlocale=no
 		ac_cv_lib_dir_opendir=no;;
+freebsd*)	LIBS="-lm $LIBS"
+		AC_CACHE_CHECK([whether -lxpg4 has to be linked],
+		  rb_cv_lib_xpg4_needed,
+		  [AC_TRY_CPP([
+#include <osreldate.h>
+#if __FreeBSD_version < 400020 || \
+   (__FreeBSD_version >= 500000 && __FreeBSD_version < 500005)
+#error needs libxpg4
+#endif
+		   ],
+		   rb_cv_lib_xpg4_needed=no,
+		   rb_cv_lib_xpg4_needed=yes,
+		   rb_cv_lib_xpg4_needed=yes)])
+		if test "$rb_cv_lib_xpg4_needed" = yes; then
+			AC_CHECK_LIB(xpg4, setlocale)
+		fi
+		;;
 *) LIBS="-lm $LIBS";;
 esac
 AC_CHECK_LIB(crypt, crypt)
 AC_CHECK_LIB(dl, dlopen)	# Dynamic linking for SunOS/Solaris and SYSV
 AC_CHECK_LIB(dld, shl_load)	# Dynamic linking for HP-UX
-AC_CHECK_LIB(xpg4, setlocale)	# FreeBSD needs this
 
 dnl Checks for header files.
 AC_HEADER_DIRENT

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