[toplevel patch v.2] Up with parallelism!

[Nathanael Nerode <neroden@twcny.rr.com>]

Tested as with the previous version on i686-pc-linux-gnu with
make -j 4 bootstrap.

	* configure.in: Disable serial configure by default.
	* configure: Regenerate.
	* Makefile.tpl: Abolish .NOTPARALLEL.
	* Makefile.in: Regenerate.

Index: configure.in
===================================================================
RCS file: /cvs/gcc/gcc/configure.in,v
retrieving revision 1.237
diff -u -r1.237 configure.in
--- configure.in	3 Jun 2003 20:42:13 -0000	1.237
+++ configure.in	10 Jun 2003 22:32:59 -0000
@@ -1698,18 +1698,25 @@
 # Create the serialization dependencies.  This uses a temporary file.
 
 AC_ARG_ENABLE([serial-configure],
-[  --disable-serial-[{host,target,build}-]configure
-                          Don't force sequential configuration of
+[  --enable-serial-[{host,target,build}-]configure
+                          Force sequential configuration of
                           sub-packages for the host, target or build
-			  machine, or of any sub-packages at all])
+			  machine, or all sub-packages])
+
+case ${enable_serial_configure} in
+  yes)
+    enable_serial_build_configure=yes
+    enable_serial_host_configure=yes
+    enable_serial_target_configure=yes
+    ;;
+esac
 
 # These force 'configure's to be done one at a time, to avoid problems
 # with contention over a shared config.cache.
 rm -f serdep.tmp
 echo '# serdep.tmp' > serdep.tmp
 olditem=
-test "x${enable_serial_configure}" = xno ||
-test "x${enable_serial_build_configure}" = xno ||
+test "x${enable_serial_build_configure}" = xyes &&
 for item in ${build_configdirs} ; do
   case ${olditem} in
     "") ;;
@@ -1718,8 +1725,7 @@
   olditem=${item}
 done
 olditem=
-test "x${enable_serial_configure}" = xno ||
-test "x${enable_serial_host_configure}" = xno ||
+test "x${enable_serial_host_configure}" = xyes &&
 for item in ${configdirs} ; do
   case ${olditem} in
     "") ;;
@@ -1728,8 +1734,7 @@
   olditem=${item}
 done
 olditem=
-test "x${enable_serial_configure}" = xno ||
-test "x${enable_serial_target_configure}" = xno ||
+test "x${enable_serial_target_configure}" = xyes &&
 for item in ${target_configdirs} ; do
   case ${olditem} in
     "") ;;
Index: Makefile.tpl
===================================================================
RCS file: /cvs/gcc/gcc/Makefile.tpl,v
retrieving revision 1.57
diff -u -r1.57 Makefile.tpl
--- Makefile.tpl	10 Jun 2003 22:24:39 -0000	1.57
+++ Makefile.tpl	10 Jun 2003 22:33:11 -0000
@@ -731,7 +731,7 @@
 
 .PHONY: check do-check
 check:
-	$(MAKE) do-check NOTPARALLEL=parallel-ok
+	$(MAKE) do-check
 
 # Only include modules actually being configured and built.
 do-check: maybe-check-gcc [+
@@ -1298,7 +1298,7 @@
 
 .PHONY: check-c++
 check-c++:
-	$(MAKE) check-target-libstdc++-v3 check-gcc-c++ NOTPARALLEL=parallel-ok
+	$(MAKE) check-target-libstdc++-v3 check-gcc-c++
 
 .PHONY: install-gcc maybe-install-gcc
 maybe-install-gcc:
@@ -1494,12 +1494,6 @@
 # ------------------------------
 # Special directives to GNU Make
 # ------------------------------
-
-# Tell GNU make 3.79 not to run the top level in parallel.  This 
-# prevents contention for $builddir/$target/config.cache, as well
-# as minimizing scatter in file system caches.
-NOTPARALLEL = .NOTPARALLEL
-$(NOTPARALLEL):
 
 # Don't pass command-line variables to submakes.
 .NOEXPORT: