Add support for cross-compilation. The user must export ARCH, and
either CROSS_COMPILE or LLVM as needed.
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
---
scripts/livepatch/klp-build | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/scripts/livepatch/klp-build b/scripts/livepatch/klp-build
index 809e198a561d..b6c057e2120f 100755
--- a/scripts/livepatch/klp-build
+++ b/scripts/livepatch/klp-build
@@ -404,6 +404,14 @@ validate_patches() {
revert_patches
}
+cross_compile_init() {
+ if [[ -v LLVM ]]; then
+ OBJCOPY=llvm-objcopy
+ else
+ OBJCOPY="${CROSS_COMPILE:-}objcopy"
+ fi
+}
+
do_init() {
# We're not yet smart enough to handle anything other than in-tree
# builds in pwd.
@@ -420,6 +428,7 @@ do_init() {
validate_config
set_module_name
set_kernelversion
+ cross_compile_init
}
# Refresh the patch hunk headers, specifically the line numbers and counts.
@@ -783,7 +792,7 @@ build_patch_module() {
cp -f "$kmod_file" "$kmod_file.orig"
# Work around issue where slight .config change makes corrupt BTF
- objcopy --remove-section=.BTF "$kmod_file"
+ "$OBJCOPY" --remove-section=.BTF "$kmod_file"
# Fix (and work around) linker wreckage for klp syms / relocs
"$SRC/tools/objtool/objtool" klp post-link "$kmod_file" || die "objtool klp post-link failed"
--
2.53.0