* lib/mkmf.rb: more verbose message. [ruby-Bugs-12766]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@12866 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 5 deletions

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index ac13c9f94e..9c6f1c66f2 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -114,13 +114,12 @@ end
 topdir = File.dirname(libdir = File.dirname(__FILE__))
 extdir = File.expand_path("ext", topdir)
 $extmk = File.expand_path($0)[0, extdir.size+1] == extdir+"/"
-if not $extmk and File.exist?(Config::CONFIG["archdir"] + "/ruby.h")
-  $hdrdir = $topdir = Config::CONFIG["archdir"]
-elsif File.exist?(($top_srcdir ||= topdir)  + "/ruby.h") and
+if not $extmk and File.exist?(($hdrdir = Config::CONFIG["archdir"]) + "/ruby.h")
+  $topdir = $hdrdir
+elsif File.exist?(($hdrdir = ($top_srcdir ||= topdir))  + "/ruby.h") and
     File.exist?(($topdir ||= Config::CONFIG["topdir"]) + "/config.h")
-  $hdrdir = $top_srcdir
 else
-  abort "can't find header files for ruby."
+  abort "mkmf.rb can't find header files for ruby at #{$hdrdir}/ruby.h"
 end
 
 OUTFLAG = CONFIG['OUTFLAG']