[U-Boot] [PATCH v2 1/2] mkconfig: split the board make target to multiple config targets

[Mingkai Hu]

To simplify the top level makefile it useful to be able to parse
the top level makefile target to multiple individual target, then
put them to the config.h, leave the board config file to handle
the different targets.

Note that this method uses the '_'(underline) as the delimiter when
splits the board make target.

Signed-off-by: Mingkai Hu <Mingkai.hu at freescale.com>
---

According to the comments from Wolfgang and Scott, I modified
the patch and made some modification over v1:

 - remove the sectence thats puts the splited variables to the
   config.mk, we can use the CONFIG_MK_* in the board config file
   to override the variable in the board config file.

 - change CONFIG_OPT_* to CONFIG_MK_*

 mkconfig |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/mkconfig b/mkconfig
index b0bbbd1..4c5675b 100755
--- a/mkconfig
+++ b/mkconfig
@@ -10,12 +10,14 @@
 
 APPEND=no	# Default: Create new config file
 BOARD_NAME=""	# Name to print in make output
+TARGETS=""
 
 while [ $# -gt 0 ] ; do
 	case "$1" in
 	--) shift ; break ;;
 	-a) shift ; APPEND=yes ;;
 	-n) shift ; BOARD_NAME="${1%%_config}" ; shift ;;
+	-t) shift ; TARGETS="`echo $1 | sed 's:_: :g'` ${TARGETS}" ; shift ;;
 	*)  break ;;
 	esac
 done
@@ -82,6 +84,11 @@ else
 	> config.h		# Create new config file
 fi
 echo "/* Automatically generated - do not edit */" >>config.h
+
+for i in ${TARGETS} ; do
+	echo "#define CONFIG_MK_${i} 1" >>config.h ;
+done
+
 echo "#include <configs/$1.h>" >>config.h
 echo "#include <asm/config.h>" >>config.h
 
-- 
1.6.4