Fix: preserve example files' timestamps when copying

This fixes an issue where examples were always being rebuilt
when performing an out of tree build since the examples were
being copied to the build directory with a timestamp more
recent than the already-built example objects.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/doc/examples/Makefile.am b/doc/examples/Makefile.am
index 028da67b7b4370f304b0c62472db6b8d616a70bf..d8a76fed6f70d515bdc4122f0baea553c8c619c4 100644 (file)
--- a/doc/examples/Makefile.am
+++ b/doc/examples/Makefile.am
@@ -122,10 +122,10 @@ SUBDIRS_PROXY = hlist list urcu-flavors wfcqueue rculfqueue \
 # Copies are for VPATH build support.
 all-local:
        @if [ x"$(srcdir)" != x"$(builddir)" ]; then \
-               cp -fR $(srcdir)/dist-files $(builddir); \
-               cp -f $(srcdir)/Makefile.examples.template $(builddir); \
+               cp -pfR $(srcdir)/dist-files $(builddir); \
+               cp -pf $(srcdir)/Makefile.examples.template $(builddir); \
                for subdir in $(SUBDIRS_PROXY); do \
-                       cp -fR $(srcdir)/$$subdir $(builddir); \
+                       cp -pfR $(srcdir)/$$subdir $(builddir); \
                done; \
        fi; \
        if [ x"$(shell echo "$(top_srcdir)" | grep "^/" | wc -l)" = x"1" ]; then \