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-rw-r--r--lib/mkmf.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index d7964d61cb..a4388862a3 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -1660,7 +1660,9 @@ VPATH = #{vpath.join(CONFIG['PATH_SEPARATOR'])}
extconf_h = $extconf_h ? "-DRUBY_EXTCONF_H=\\\"$(RUBY_EXTCONF_H)\\\" " : $defs.join(" ") << " "
if warnflags = CONFIG['warnflags'] and CONFIG['GCC'] == 'yes' and !$extmk
# turn warnings into errors only for bundled extensions.
- warnflags = warnflags.gsub(/(?:\A|\s)-Werror=/, '\1-W')
+ warnflags = warnflags.split.map { |flag|
+ flag.gsub(/(?:\A|\s)-Werror=/, '\1-W')
+ }.join ' '
end
mk << %{
CC = #{CONFIG['CC']}