nobu	2010-11-06 07:33:18 +0900 (Sat, 06 Nov 2010)

  New Revision: 29706

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=29706

  Log:
    * configure.in (rb_cv_export_prefix): check for prefixed
      underscore of exported symbols

  Modified files:
    trunk/ChangeLog
    trunk/configure.in

Index: configure.in
===================================================================
--- configure.in	(revision 29705)
+++ configure.in	(revision 29706)
@@ -2344,6 +2344,13 @@
 if test "$rb_with_pthread" = "yes"; then
     THREAD_MODEL=pthread
 fi
+AC_CACHE_CHECK([for prefixed underscore of exported symbols], rb_cv_export_prefix, [
+    AC_TRY_COMPILE([extern void conftest_exported(void) {}], [], [
+	rb_cv_export_prefix=`$NM conftest.$ac_objext |
+			     sed -n ['s/.*\(_\)conftest_exported.*/\1/p']`
+	],
+	[rb_cv_export_prefix=''])
+])
 MINIDLNOBJ=dmydln.o
 AS_CASE(["$target_os"],
     [linux*], [
@@ -2409,7 +2416,8 @@
 		LIBRUBY_SO='$(RUBY_SO_NAME)'.dll
 		LIBRUBY_DLDFLAGS="${LIBRUBY_DLDFLAGS}"' $(RUBYDEF)'
 	    fi
-	    EXPORT_PREFIX=' '
+	    test -z "$rb_cv_export_prefix" && rb_cv_export_prefix=' '
+	    EXPORT_PREFIX="$rb_cv_export_prefix"
 	    DLDFLAGS="${DLDFLAGS}"' $(DEFFILE)'
 	    AC_LIBOBJ([win32])
 	    COMMON_LIBS=m
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 29705)
+++ ChangeLog	(revision 29706)
@@ -1,5 +1,8 @@
-Sat Nov  6 07:30:07 2010  Nobuyoshi Nakada  <nobu@r...>
+Sat Nov  6 07:33:08 2010  Nobuyoshi Nakada  <nobu@r...>
 
+	* configure.in (rb_cv_export_prefix): check for prefixed
+	  underscore of exported symbols
+
 	* tool/rbinstall.rb (bin-comm): prepend prolog shell script if
 	  necessary.
 

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