关于这个命令:make -C ld LDFLAGS="-all-static" LIB_PATH=/tools/lib
书上市这样解释的-C ld LDFLAGS="-all-static" LIB_PATH=/tools/lib: This option rebuilds everything in the ld subdirectory. Specifying the LIB_PATH makefile variable on the command line allows us to override the default value and have it point to our temporary tools location. The value of this variable specifies the linker's default library search path. You will see how this preparation is used later on in the chapter.