build.rs: Add KBUILD_CFLAGS_MODULE to cflags

fishinabarrel / linux-kernel-module-rust

Framework for writing Linux kernel modules in safe Rust

GNU General Public License v2.0

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Closed Bobo1239 closed 4 years ago

Bobo1239 commented 4 years ago

KBUILD_CFLAGS_MODULE=-DMODULE isn't included in c_flags anymore on Linux 5.4+ due to some Makefile refactoring. We just do it ourselves for now.

Fixes #241.

geofft commented 4 years ago

Successfully builds for me with KDIR=/lib/modules/5.7.0-2-amd64/build from Debian unstable. Thanks!