* Makefile ($(includedir)/stubs.h): Don't touch target if new one is

	identical.

diff --git a/ChangeLog b/ChangeLog
index 5df192e..4e5aca3 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 Mon May 27 10:10:00 1996  Roland McGrath  <roland@delasyd.gnu.ai.mit.edu>
 
+       * Makefile ($(includedir)/stubs.h): Don't touch target if new one is
+       identical.
+
        * time/Makefile (z.% rule): Generate generic zone%/ rule after
        zone%/right/ and zone%/posix/ rules so they match first.
 

diff --git a/Makefile b/Makefile
index 24203a2..42c1ebb 100644 (file)
--- 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
 \f
 # This makes the Info or DVI file of the documentation from the Texinfo source.