Linux kernel makefile env variables of interest

Interesting environment variables to make use of when compiling Linux

Generic:

• V=1: Enable verbose mode, print the executed command for each step

Used with make modules_install:

• INSTALL_MOD_PATH: Module installation location
• KBUILD_SIGN_PIN: Decryption key for module signing certificate key
• INSTALL_MOD_STRIP: Set to 1 to strip modules as they are being installed to save space

Out of tree module building:

make -C $(KERNEL_SOURCE_PATH) M=$(MODULE_SOURCE_PATH)