1 files changed, 6 insertions, 1 deletions
diff --git a/common.mk b/common.mk
index 0d2e3d9c48..d1a3102521 100644
--- a/common.mk
+++ b/common.mk
@@ -60,7 +60,12 @@ RDOCOUT       = $(EXTOUT)/rdoc
 HTMLOUT       = $(EXTOUT)/html
 CAPIOUT       = doc/capi
 MJIT_HEADER   = rb_mjit_header.h
-MJIT_MIN_HEADER = $(EXTOUT)/include/$(arch)/rb_mjit_min_header-$(RUBY_PROGRAM_VERSION).h
+MJIT_MIN_HEADER = $(MJIT_HEADER_BUILD_DIR)/rb_mjit_min_header-$(RUBY_PROGRAM_VERSION).h
+MJIT_CPPFLAGS = -DMJIT_HEADER_INSTALL_DIR=\""$(MJIT_HEADER_INSTALL_DIR)"\" \
+		-DMJIT_HEADER_BUILD_DIR=\""$(MJIT_HEADER_BUILD_DIR)"\" \
+		-DLIBRUBYARG_SHARED=\""$(LIBRUBYARG_SHARED)"\"
+MJIT_HEADER_BUILD_DIR = $(EXTOUT)/include/$(arch)
+MJIT_HEADER_INSTALL_DIR = include/$(RUBY_BASE_NAME)-$(ruby_version)/$(arch)
 
 INITOBJS      = dmyext.$(OBJEXT) dmyenc.$(OBJEXT)
 NORMALMAINOBJ = main.$(OBJEXT)