Makefile improvements.

* Makefile.in (lib): Depend on am--refresh, to avoid a race.
(src): Remove duplicate dependency on FRC.
Invoke just one submake, not two.  Avoid the need for 'pwd'.
* lwlib/Makefile.in (all): Put this first.  Don't use double-colon
rules, as they are not portable according to POSIX.  Mark as phony.
* oldXMenu/Makefile.in (all, tags): Don't use double-colon rules, as they
are not portable according to POSIX.  Mark as phony.
* src/Makefile.in (config.status): Don't use double-colon rules, as
they are not portable according to POSIX.  Fix shell typo with `;
I guess this rule has never been tested?
(VCSWITNESS): New macro, to override any environment var.

2 files changed, 9 insertions, 2 deletions

diff --git a/lwlib/ChangeLog b/lwlib/ChangeLog
index a9e424ac4b3..5a1018f85e5 100644
--- a/lwlib/ChangeLog
+++ b/lwlib/ChangeLog
@@ -1,3 +1,9 @@
+2013-09-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+        Makefile improvements.
+        * Makefile.in (all): Put this first.  Don't use double-colon
+        rules, as they are not portable according to POSIX.  Mark as phony.
+
 2013-06-30  Paul Eggert  <eggert@cs.ucla.edu>
 
         Fix minor problems found by static checking.
diff --git a/lwlib/Makefile.in b/lwlib/Makefile.in
index f228221c45d..40f4a405e97 100644
--- a/lwlib/Makefile.in
+++ b/lwlib/Makefile.in
@@ -59,11 +59,12 @@ ALL_CFLAGS= $(C_SWITCH_SYSTEM) $(C_SWITCH_X_SITE) \
   -Demacs -I../src \
   -I$(srcdir) -I$(srcdir)/../src -I../lib -I$(srcdir)/../lib
 
+all: liblw.a
+.PHONY: all
+
 .c.o:
         $(CC) -c $(CPPFLAGS) $(ALL_CFLAGS) $<
 
-all:: liblw.a
-
 liblw.a: $(OBJS)
         rm -f $@
         $(AR) $(ARFLAGS) $@ $(OBJS)