現象
系統本來可以正常編譯linux系統kernel，但在安裝svn后，kernel編譯出錯。
CHK include/linux/version.h
CHK include/generated/utsrelease.h
make[1]: `include/generated/mach-types.h' is up to date.
CALL scripts/checksyscalls.sh
CHK include/generated/compile.h
gcc: directory: No such file or directory
gcc: directory": No such file or directory
<command-line>:0: warning: missing terminating " character
gcc: directory: No such file or directory
gcc: directory": No such file or directory
<command-line>:0: warning: missing terminating " character
gcc: directory: No such file or directory
gcc: directory": No such file or directory
<command-line>:0: warning: missing terminating " character
CC drivers/gpu/mali/mali/common/mali_kernel_core.o
arm-eabi-gcc: error: ": No such file or directory
make[4]: *** [drivers/gpu/mali/mali/common/mali_kernel_core.o] 錯誤 1
make[3]: *** [drivers/gpu/mali/mali] 錯誤 2
make[2]: *** [drivers/gpu/mali] 錯誤 2
make[1]: *** [drivers/gpu] 錯誤 2
make: *** [drivers] 錯誤 2
make: *** 正在等待未完成的任務....
原因分析
定位到 drivers/gpu/mali/ump/Makefile.common 和 drivers/gpu/mali/mali/Makefile 兩個文件中都有關于 SVN_REV:=xxxx 的語句，正常情況下 SVN_REV:= 為空，當檢查到svn版本后， SVN_REV:= 有了值，導致腳本中判斷走入錯誤分支。
解決方法
將兩個文件中的 SVN_REV 值都賦值為空 “” 即可。
drivers/gpu/mali/ump/Makefile.common：
16 # Get subversion revision number, fall back to 0000 if no svn info is available
17 #SVN_REV:=$(shell ((svnversion | grep -qv exported && echo -n 'Revision: ' && svnversion) || git svn info | sed -e 's/$$$$/M/' | grep '^Revision: ' || echo ${MALI_RELEASE_NAME}) 2>/dev/null | sed -e 's/^Revision: //')
19 SVN_REV:=""
drivers/gpu/mali/mali/Makefile：
117 #SVN_REV := $(shell (cd $(DRIVER_DIR); (svnversion | grep -qv exported && svnversion) || git svn info | grep '^Revision: '| sed -e 's/ ^Revision: //' ) 2>/dev/null )
119 SVN_REV := ""
總結
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