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authorRoland McGrath <roland@gnu.org>1996-05-27 19:19:29 +0000
committerRoland McGrath <roland@gnu.org>1996-05-27 19:19:29 +0000
commitd36e76923049df98b0f5c99a32cdd79302bf9dff (patch)
treefcffe66d28ecea25f34241df41417dbdcc4380e2 /Makefile
parent4e395306e8c74411b565df245e7e6d7cda433377 (diff)
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* Makefile ($(includedir)/stubs.h): Don't touch target if new one is
identical.
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/Makefile b/Makefile
index 24203a2aa0..42c1ebb7d7 100644
--- a/Makefile
+++ b/Makefile
@@ -144,7 +144,8 @@ $(includedir)/stubs.h: subdir_install
echo ' in the C library which is a stub, meaning it will fail';\
echo ' every time called, usually setting errno to ENOSYS. */';\
sort $(subdir-stubs)) > $(objpfx)stubs.h
- $(INSTALL_DATA) $(objpfx)stubs.h $@
+ if test -r $@ && cmp -s $(objpfx)stubs.h $@; then : ; \
+ else $(INSTALL_DATA) $(objpfx)stubs.h $@; fi
rm -f $(objpfx)stubs.h
# This makes the Info or DVI file of the documentation from the Texinfo source.