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-rw-r--r--lib/rubygems/ext/ext_conf_builder.rb7
1 files changed, 6 insertions, 1 deletions
diff --git a/lib/rubygems/ext/ext_conf_builder.rb b/lib/rubygems/ext/ext_conf_builder.rb
index d11d1ac328..f5c4c8ce84 100644
--- a/lib/rubygems/ext/ext_conf_builder.rb
+++ b/lib/rubygems/ext/ext_conf_builder.rb
@@ -35,7 +35,12 @@ class Gem::Ext::ExtConfBuilder < Gem::Ext::Builder
begin
run cmd, results
ensure
- FileUtils.mv 'mkmf.log', dest_path if File.exist? 'mkmf.log'
+ if File.exist? 'mkmf.log'
+ results << "To see why this extension failed to compile, please check" \
+ " the mkmf.log which can be found here:\n"
+ results << " " + File.join(dest_path, 'mkmf.log') + "\n"
+ FileUtils.mv 'mkmf.log', dest_path
+ end
siteconf.unlink
end