If CONFIG_KERNEL_LZ4 is enabled without lz4 tool installed on the system, the build fails at the very last stage (reported by Borislav Petkov [1]). LZO arch/x86/boot/compressed/vmlinux.bin.lzo /bin/sh: 1: lzop: not found arch/x86/boot/compressed/Makefile:141: recipe for target 'arch/x86/boot/compressed/vmlinux.bin.lzo' failed make[2]: *** [arch/x86/boot/compressed/vmlinux.bin.lzo] Error 1 arch/x86/boot/Makefile:112: recipe for target 'arch/x86/boot/compressed/vmlinux' failed make[1]: *** [arch/x86/boot/compressed/vmlinux] Error 2 arch/x86/Makefile:284: recipe for target 'bzImage' failed make: *** [bzImage] Error 2 Check the tools in scripts/Makefile.toolcheck to fail the build earlier with a more readable message. [1] https://patchwork.kernel.org/patch/10635381/ Suggested-by: Borislav Petkov <bp@xxxxxxx> Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> --- scripts/Makefile.toolcheck | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/scripts/Makefile.toolcheck b/scripts/Makefile.toolcheck index bc26fc0..5e336e4 100644 --- a/scripts/Makefile.toolcheck +++ b/scripts/Makefile.toolcheck @@ -17,6 +17,14 @@ msg_stack_validation = "libelf is necessary for building the objtool." \ "Please install libelf-dev, libelf-devel or elfutils-libelf-devel." toolcheck-$(CONFIG_STACK_VALIDATION) += stack_validation +chk_lzo = command -v lzop +msg_lzo = "lzo tool not found. Please install it." +toolcheck-$(CONFIG_KERNEL_LZO) += lzo + +chk_lz4 = command -v lz4c +msg_lz4 = "lz4 tool not found. Please install it." +toolcheck-$(CONFIG_KERNEL_LZ4) += lz4 + PHONY += $(toolcheck-y) __toolcheck: $(toolcheck-y) -- 2.7.4
