build system: use POSIX options only for cp

cp: improve comment

2 files changed, 4 insertions, 3 deletions

diff --git a/Makefile.custom b/Makefile.custom
index e4a616f65..3334b31eb 100644
--- a/Makefile.custom
+++ b/Makefile.custom
@@ -47,10 +47,11 @@ ifneq ($(strip $(DO_INSTALL_LIBS)),n)
 endif
 
 # Not very elegant: copies testsuite to objdir...
+# (cp -pPR is POSIX-compliant (cp -dpR or cp -a would not be))
 .PHONY: check
 .PHONY: test
 check test: busybox busybox.links
-        test -d $(objtree)/testsuite || cp -a $(srctree)/testsuite $(objtree)
+        test -d $(objtree)/testsuite || cp -pPR $(srctree)/testsuite $(objtree)
         bindir=$(objtree) srcdir=$(srctree)/testsuite \
         $(SHELL) -c "cd $(objtree)/testsuite && $(srctree)/testsuite/runtest $(if $(KBUILD_VERBOSE:0=),-v)"
 
@@ -58,7 +59,7 @@ check test: busybox busybox.links
 release: distclean
         cd ..; \
         rm -r -f busybox-$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION); \
-        cp -a busybox busybox-$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) && { \
+        cp -pPR busybox busybox-$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) && { \
         find busybox-$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)/ -type d \
                 -name .svn \
                 -print \
diff --git a/coreutils/cp.c b/coreutils/cp.c
index 6cf1e21a1..a4eea9498 100644
--- a/coreutils/cp.c
+++ b/coreutils/cp.c
@@ -44,7 +44,7 @@ int cp_main(int argc, char **argv)
         // Soft- and hardlinking don't mix
         // -P and -d are the same (-P is POSIX, -d is GNU)
         // -r and -R are the same
-        // -R (and therefore -r) switches on -d (coreutils does this)
+        // -R (and therefore -r) turns on -d (coreutils does this)
         // -a = -pdR
         opt_complementary = "-2:l--s:s--l:Pd:rRd:Rd:apdR";
         flags = getopt32(argv, FILEUTILS_CP_OPTSTR "arPHL");