[coreboot] [PATCH]Speed up makefile processing a bit

[Patrick Georgi]

Hi,

following patch reduces time make -n oldconfig from ~5 to ~0.5 seconds
on mingw, by not parsing all the Makefile.incs when they're not in use.
Same for the other config targets and distclean.

It also optimizes rm -rf and mkdir -p sequences a bit: No need to delete
all object files manually, just to run rm -rf $(obj) afterwards.

Signed-off-by: Patrick Georgi <patrick.georgi at coresystems.de>

Index: Makefile
===================================================================
--- Makefile    (Revision 5467)
+++ Makefile    (Arbeitskopie)
@@ -70,7 +70,15 @@
 DOXYGEN_OUTPUT_DIR := doxygen

 ifeq ($(strip $(HAVE_DOTCONFIG)),)
+NOCOMPILE:=1
+endif
+ifneq ($(MAKECMDGOALS),)
+ifneq ($(filter config oldconfig menuconfig kconfig qconfig
distclean,$(MAKECMDGOALS)),)
+NOCOMPILE:=1
+endif
+endif

+ifeq ($(NOCOMPILE),1)
 all: config

 else
@@ -294,9 +302,7 @@
 endif

 prepare:
-       mkdir -p $(obj)
-       mkdir -p $(objutil)/kconfig/lxdialog $(objutil)/cbfstool
$(objutil)/romcc $(objutil)/options
-       test -n "$(alldirs)" && mkdir -p $(alldirs) || true
+       mkdir -p $(obj) $(objutil)/kconfig/lxdialog $(objutil)/cbfstool
$(objutil)/romcc $(objutil)/options $(alldirs)

 $(obj)/build.h: .xcompile
        @printf "    GEN        build.h\n"
@@ -342,9 +348,9 @@
 clean: clean-for-update
        rm -f $(obj)/coreboot* .ccwrap

-distclean: clean
+distclean:
        rm -rf $(obj)
-       rm -f .config .config.old ..config.tmp .kconfig.d .tmpconfig*
+       rm -f .config .config.old ..config.tmp .kconfig.d .tmpconfig*
.ccwrap .xcompile

 update:
        dongle.py -c /dev/term/1 $(obj)/coreboot.rom EOF