ccache: error: Failed to create temporary file for /home/linux/.buildroot-ccache/tmp/empty.stdout: Permission denied
scripts/Makefile.build:265: recipe for target ‘scripts/mod/empty.o’ failed
make[1]: *** [scripts/mod/empty.o] Error 1
Makefile:1110: recipe for target ‘prepare0’ failed
make: *** [prepare0] Error 2
修改 .buildroot-ccache/ 的权限 就可以了