详细错误：
/home/tsrj/tsjdk8-project/tsjdk8/hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp:227:26: error: control reaches end of non-void function [-Werror=return-type]
SignalHandlerMark shm(t);
解决办法：
make/linux/makefiles/gcc.make:204
注释掉WARNINGS_ARE_ERRORS = -Werror
