cp on OS X doesn't know the option -u. It isn't really needed, so simply remove it.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23792 a1c6a512-1295-4272-9138-f99709370657
diff --git a/manual/Makefile b/manual/Makefile
index 6a52af1..b0eee3d 100644
--- a/manual/Makefile
+++ b/manual/Makefile
@@ -22,7 +22,7 @@
@if [ "$(OBJDIR)" = "" ]; then echo Run make in you build directory!; false; fi
@mkdir -p $(OBJDIR)
@find * -type d \! -regex '.*\.svn.*' -exec mkdir -p $(OBJDIR)/{} \;
- @find * -type f \! -regex '.*\.svn.*' -exec cp -u {} $(OBJDIR)/{} \;
+ @find * -type f \! -regex '.*\.svn.*' -exec cp {} $(OBJDIR)/{} \;
@printf "%s%%" $(VERSION) > $(OBJDIR)/version.tex
@perl credits.pl < $(DOCSDIR)/CREDITS > $(OBJDIR)/CREDITS.tex
@printf "\\\\newcommand{\\\\platform}{${MANUALDEV}}\n" > $(OBJDIR)/$(MANFILE).tex