--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libgcc/config/t-darwin	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,22 @@
+# Set this as a minimum (unless overriden by arch t-files) since it's a
+# reasonable lowest common denominator that works for all our archs.
+HOST_LIBGCC2_CFLAGS += -mmacosx-version-min=10.5
+
+crt3.o: $(srcdir)/config/darwin-crt3.c
+	$(crt_compile) $(DARWIN_EXTRA_CRT_BUILD_CFLAGS) -c $<
+
+crttms.o: $(srcdir)/config/darwin-crt-tm.c
+	$(crt_compile) $(DARWIN_EXTRA_CRT_BUILD_CFLAGS) -DSTART -c $<
+
+crttme.o: $(srcdir)/config/darwin-crt-tm.c
+	$(crt_compile) $(DARWIN_EXTRA_CRT_BUILD_CFLAGS) -DEND -c $<
+
+# -pipe because there's an assembler bug, 4077127, which causes
+# it to not properly process the first # directive, causing temporary
+# file names to appear in stabs, causing the bootstrap to fail.  Using -pipe
+# works around this by not having any temporary file names.
+HOST_LIBGCC2_CFLAGS += -pipe
+
+# Use unwind-dw2-fde-darwin
+LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/config/unwind-dw2-fde-darwin.c \
+  $(srcdir)/unwind-sjlj.c $(srcdir)/unwind-c.c