uboot 2015 编译Flow

一、make xxxx_defconfig 

make -f ./scripts/Makefile.build obj=scripts/basic
  cc -Wp,-MD,scripts/basic/.fixdep.d -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer     -o scripts/basic/fixdep scripts/basic/fixdep.c  
rm -f .tmp_quiet_recordmcount
make -f ./scripts/Makefile.build obj=scripts/kconfig smdk2410_defconfig
  cc -Wp,-MD,scripts/kconfig/.conf.o.d -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer   -DCURSES_LOC="<ncurses.h>" -DLOCALE   -c -o scripts/kconfig/conf.o scripts/kconfig/conf.c
  cat scripts/kconfig/zconf.tab.c_shipped > scripts/kconfig/zconf.tab.c
  cat scripts/kconfig/zconf.lex.c_shipped > scripts/kconfig/zconf.lex.c
  cat scripts/kconfig/zconf.hash.c_shipped > scripts/kconfig/zconf.hash.c
  cc -Wp,-MD,scripts/kconfig/.zconf.tab.o.d -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer   -DCURSES_LOC="<ncurses.h>" -DLOCALE  -Iscripts/kconfig -c -o scripts/kconfig/zconf.tab.o scripts/kconfig/zconf.tab.c
  cc  -o scripts/kconfig/conf scripts/kconfig/conf.o scripts/kconfig/zconf.tab.o  
scripts/kconfig/conf --defconfig=arch/../configs/smdk2410_defconfig Kconfig
#
# configuration written to .config
#

有上面部分可以看到：编译了fixdep, conf；然后执行了：

scripts/kconfig/conf --defconfig=arch/../configs/smdk2410_defconfig Kconfig
这过程中生成了srctree/.config文件。

二、make all

　　2.1 make all的时候程序执行流程：

　　　　=>ifeq ($(dot-config),1)

　　　　=>make -f ./Makefile silentoldconfig

　　　　=>make -f ./scripts/Makefile.autoconf      

　　　　　　->generate include/config.h

　　　　　　->create_symlink

　　　　=>...