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-rw-r--r--lib/mkmf.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index b16600de6a..ea5492e0ed 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -2308,7 +2308,7 @@ TIMESTAMP_DIR = #{$extout ? '$(extout)/.timestamp' : '.'}
'$(RUBYARCHDIR)'
n = '$(TARGET_SO_DIR)$(TARGET)'
mfile.print "
-TARGET_SO_DIR =#{(sodir ? " #{sodir}/" : '')}
+TARGET_SO_DIR =#{(sodir && !sodir.empty? ? " #{sodir}/" : '')}
TARGET_SO = $(TARGET_SO_DIR)$(DLLIB)
CLEANLIBS = $(TARGET_SO) #{config_string('cleanlibs') {|t| t.gsub(/\$\*/) {n}}}
CLEANOBJS = *.#{$OBJEXT} #{config_string('cleanobjs') {|t| t.gsub(/\$\*/, "$(TARGET)#{deffile ? '-$(arch)': ''}")} if target} *.bak