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-rw-r--r--win32/Makefile.sub8
1 files changed, 8 insertions, 0 deletions
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index 8e81404190..af0e157930 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -1,3 +1,5 @@
+# -*- makefile -*-
+
SHELL = $(COMSPEC)
#### Start of system configuration section. ####
@@ -74,6 +76,12 @@ RUBY_SO_NAME = $(RT)-$(RUBY_INSTALL_NAME)$(MAJOR)$(MINOR)
!if !defined(prefix)
prefix = /usr
!endif
+!if !defined(exec_prefix)
+exec_prefix = $(prefix)
+!endif
+!if !defined(libdir)
+libdir = $(exec_prefix)/lib
+!endif
!if !defined(DESTDIR)
DESTDIR = $(prefix)
!endif