[mingw] Add "make dist-win" to toplevel Makefile

Makefile.am

@@ -66,8 +66,6 @@ DISTCHECK_CONFIGURE_FLAGS = \
 	--enable-introspection \
 	$(NULL)
 
-# TODO: Copy infrastructure from cairo
-
 # TAR_OPTIONS is not set as env var for 'make dist'.  How to fix that?
 TAR_OPTIONS = --owner=0 --group=0
 
@@ -76,7 +74,6 @@ dist-hook: dist-clear-sticky-bits
 dist-clear-sticky-bits:
 	chmod -R a-s $(distdir)
 
-
 tar_file = $(PACKAGE_TARNAME)-$(VERSION).tar.xz
 sha256_file = $(tar_file).sha256
 gpg_file = $(sha256_file).asc
@@ -88,5 +85,18 @@ $(gpg_file): $(sha256_file)
 
 release-files: $(tar_file) $(sha256_file) $(gpg_file)
 
+dist-win:
+	@case $(host_triplet) in *-w64-mingw32) ;; *) echo "Error: Requires mingw build. See README.mingw.md.">&2; exit 1 ;; esac
+	@DIR=$(PACKAGE_TARNAME)-$(VERSION)-win`case $(host_triplet) in i686-*) echo 32 ;; x86_64-*) echo 64 ;; esac`; \
+	$(RM) -r $$DIR; $(MKDIR_P) $$DIR || exit 1; \
+	cp util/.libs/hb-{shape,view,subset}.exe $$DIR && \
+	$(top_srcdir)/mingw-ldd.py $$DIR/hb-view.exe | grep -v 'not found' | cut -d '>' -f 2 | xargs cp -t $$DIR && \
+	cp src/.libs/libharfbuzz{,-subset}-0.dll $$DIR && \
+	chmod a+x $$DIR/*.{exe,dll} && \
+	$(STRIP) $$DIR/*.{exe,dll} && \
+	zip -r $$DIR.zip $$DIR && \
+	$(RM) -r $$DIR && \
+	echo "$$DIR.zip is ready."
+
 
 -include $(top_srcdir)/git.mk