问题：
系统正常编译linux系统kernel，安装svn后，kernel编译出错。
错误：
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] 错误 1 make[3]: *** [drivers/gpu/mali/mali] 错误 2 make[2]: *** [drivers/gpu/mali] 错误 2 make[1]: *** [drivers/gpu] 错误 2 make: *** [drivers] 错误 2 make: *** 正在等待未完成的任务....
原因分析：
定位到
drivers/gpu/mali/ump/Makefile.common
drivers/gpu/mali/mali/Makefile
两个文件中都有关于SVN_REV:=xxxx的语句，正常情况下SVN_REV:=为空，当检查到svn版本后，SVN_REV:=有了值，导致脚本中判断走入分支编译。
解决：
将两个文件中的SVN_REV值都赋值为空“”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 := ""
即可解决以上问题。
专栏：
微信公众号 - MySQL数据库技术：
知乎 - 数据库技术 专栏：
https://zhuanlan.zhihu.com/mysqldb
博客：
思否/segmentfault 专栏：
https://segmentfault.com/u/dbtech
开源中国/oschina：
https://my.oschina.net/dbtech
掘金：
https://juejin.im/user/5e9d3ed251882538083fed1f/posts
博客园/cnblogs：
https://www.cnblogs.com/dbtech