$NetBSD: patch-ad,v 1.9 2011/01/17 16:51:05 drochner Exp $

--- subdir.mak.orig	2010-03-17 23:43:05.000000000 +0900
+++ subdir.mak	2011-01-05 17:06:02.000000000 +0900
@@ -59,7 +59,7 @@
 
 install-lib$(NAME)-shared: $(SUBDIR)$(SLIBNAME)
 	$(Q)mkdir -p "$(SHLIBDIR)"
-	$$(INSTALL) -m 755 $$< "$(SHLIBDIR)/$(SLIBNAME_WITH_VERSION)"
+	$$(INSTALL) -c -m 755 $$< "$(SHLIBDIR)/$(SLIBNAME_WITH_VERSION)"
 	$$(STRIP) "$(SHLIBDIR)/$(SLIBNAME_WITH_VERSION)"
 	$(Q)cd "$(SHLIBDIR)" && \
 		$(LN_S) $(SLIBNAME_WITH_VERSION) $(SLIBNAME_WITH_MAJOR)
@@ -69,16 +69,16 @@
 
 install-lib$(NAME)-static: $(SUBDIR)$(LIBNAME)
 	$(Q)mkdir -p "$(LIBDIR)"
-	$$(INSTALL) -m 644 $$< "$(LIBDIR)"
+	$$(INSTALL) -c -m 644 $$< "$(LIBDIR)"
 	$(LIB_INSTALL_EXTRA_CMD)
 
 install-lib$(NAME)-headers: $(addprefix $(SUBDIR),$(HEADERS) $(BUILT_HEADERS))
 	$(Q)mkdir -p "$(INCINSTDIR)"
-	$$(INSTALL) -m 644 $$^ "$(INCINSTDIR)"
+	$$(INSTALL) -c -m 644 $$^ "$(INCINSTDIR)"
 
 install-lib$(NAME)-pkgconfig: $(SUBDIR)lib$(NAME).pc
 	$(Q)mkdir -p "$(LIBDIR)/pkgconfig"
-	$$(INSTALL) -m 644 $$^ "$(LIBDIR)/pkgconfig"
+	$$(INSTALL) -c -m 644 $$^ "$(LIBDIR)/pkgconfig"
 
 uninstall-libs::
 	-$(RM) "$(SHLIBDIR)/$(SLIBNAME_WITH_MAJOR)" \
