Elliot Berman 3172c95582 FROMLIST: kbuild: Add environment variables for userprogs flags ... Allow additional arguments be passed to userprogs compilation. Reproducible clang builds need to provide a sysroot and gcc path to ensure the same toolchain is used across hosts. KCFLAGS is not currently used for any user programs compilation, so add new USERCFLAGS and USERLDFLAGS which serves similar purpose as HOSTCFLAGS/HOSTLDFLAGS. Clang 13+ might detect GCC installation on hosts which have it installed to a default location in /. With addition of these environment variables, you can specify flags such as: $ make USERCFLAGS=--sysroot=/path/to/sysroot This can also be used to specify different sysroots such as musl or bionic which may be installed on the host in paths that the compiler may not search by default. Signed-off-by: Elliot Berman <quic_eberman@quicinc.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Bug: 214127735 Link: https://lore.kernel.org/linux-kbuild/20220201213542.2808035-1-quic_eberman@quicinc.com/ Change-Id: I035309a569130774a1212f294973eee2830a6588 (cherry picked from commit df704104322c6bd1b3d40cb7ad109cba7453f3be)		2022-05-10 16:09:36 +00:00
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.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
Makefile	FROMLIST: kbuild: Add environment variables for userprogs flags	2022-05-10 16:09:36 +00:00