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-rw-r--r--sysdeps/mach/hurd/Makefile6
1 files changed, 4 insertions, 2 deletions
diff --git a/sysdeps/mach/hurd/Makefile b/sysdeps/mach/hurd/Makefile
index 3845c57c14..cfaeed3045 100644
--- a/sysdeps/mach/hurd/Makefile
+++ b/sysdeps/mach/hurd/Makefile
@@ -79,9 +79,11 @@ endef
 # the headers we want to search for Mach error codes, listed above (and
 # incidentally, all other headers those include).
 -include $(common-objpfx)errnos.d
-$(common-objpfx)errnos.d: $(mach-errnos-deps) libc-modules.h
+$(common-objpfx)errnos.d: $(mach-errnos-deps)
 	$(mach-errno-h) | \
-	$(CC) $(CFLAGS) $(CPPFLAGS) -M -x c - | \
+	$(CC) $(CFLAGS) \
+	    $(subst -include $(common-objpfx)libc-modules.h,,$(CPPFLAGS)) \
+	    -M -x c - | \
 	sed $(sed-remove-objpfx) -e 's,- *:,mach-errnos-deps :=,' \
 	    -e 's, \.\./, $(..),g' > $@t
 	mv -f $@t $@