nobu	2013-04-01 14:22:57 +0900 (Mon, 01 Apr 2013)

  New Revision: 40030

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=40030

  Log:
    configure.in: clang check
    
    * configure.in: check clang version by predefined macro values.
      [Bug #8192]

  Modified files:
    trunk/ChangeLog
    trunk/configure.in

Index: configure.in
===================================================================
--- configure.in	(revision 40029)
+++ configure.in	(revision 40030)
@@ -396,9 +396,12 @@ AS_CASE(["$host_os:$build_os"], https://github.com/ruby/ruby/blob/trunk/configure.in#L396
     # clang version 1.0 (http://llvm.org/svn/llvm-project/cfe/tags/Apple/clang-23 exported)
     # Apple clang version 2.0 (tags/Apple/clang-137) (based on LLVM 2.9svn)
     # Apple clang version 2.1 (tags/Apple/clang-163.7.1) (based on LLVM 3.0svn)
-    if test "$CC" = "clang" && $CC --version | grep 'clang version @<:@12 @:>@\.' ; then
-        AC_MSG_ERROR([clang version 3.0 or later is required])
-    fi
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+	@%:@if defined __APPLE_CC__ && defined __clang_major__ && __clang_major__ < 3
+	@%:@error premature clang
+	@%:@endif])],
+	[],
+	[AC_MSG_ERROR([clang version 3.0 or later is required])])
 ])
 if test x"${build}" != x"${host}"; then
   AC_CHECK_TOOL(CC, gcc)
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 40029)
+++ ChangeLog	(revision 40030)
@@ -1,3 +1,8 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Mon Apr  1 14:22:52 2013  Nobuyoshi Nakada  <nobu@r...>
+
+	* configure.in: check clang version by predefined macro values.
+	  [Bug #8192]
+
 Mon Apr  1 12:05:15 2013  Tanaka Akira  <akr@f...>
 
 	* numeric.c (check_uint): Take the 1st argument as unsigned long,

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