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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 551fa4a5a5..7ae2349046 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -544,7 +544,7 @@ SHELL = /bin/sh
srcdir = #{srcdir}
topdir = #{$topdir}
hdrdir = #{$hdrdir}
-VPATH = $(srcdir)
+VPATH = #{$mingw and CONFIG['build_os'] == 'cygwin' ? '$(shell cygpath -u $(srcdir))' : '$(srcdir)'}
}
drive = File::PATH_SEPARATOR == ';' ? /\A\w:/ : /\A/
if destdir = CONFIG["prefix"].scan(drive)[0] and !destdir.empty?