compiler-rt-sanitizers: disable builtins libraryscarthgap

Currently compiler-rt-sanitizers fails to build as native recipe.
Configuration log shows:
-- Compiler-RT supported architectures: x86_64
-- Failed to find compiler-rt builtins library for x86_64-linux

The reasons is that calling
clang --rtlib=compiler-rt -print-libgcc-file-name
returns (tested in devtool and via additional cmake logs)
/usr/lib/clang/18.1.6/lib/linux/libclang_rt.builtins-x86_64.a
which is missing the recipe-sysroot-native prefix.

COMPILER_RT_USE_BUILTINS_LIBRARY=OFF is implemented in kirkstone and
also in master (in core). Note that when moving clang from meta-clang
to core, I didn't find explanation why this was changed back, but I
assume that it was because of issues like this.

When running
clang --rtlib=compiler-rt -print-libgcc-file-name
on master, it correctly returns the sysroot prefix.
However re-enabling builtins still results in a failure because on my
system it also detects i386 multilib which then fails.

Alternative which works (at least in Debian 11) is following:
EXTRA_OECMAKE:append:class-native = "\
    -DCOMPILER_RT_LIBRARY_builtins_${BUILD_SYS}=${STAGING_LIBDIR_NATIVE}/clang/${PV}/lib/linux/libclang_rt.builtins-${BUILD_ARCH}.a \
    -DCOMPILER_RT_LIBRARY_builtins_=${STAGING_LIBDIR_NATIVE}/clang/${PV}/lib/linux/libclang_rt.builtins-${BUILD_ARCH}.a \
"
However seeing failures on master, it's uncertain if it fixes all corner
cases.

Signed-off-by: Peter Marko <peter.marko@siemens.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/recipes-devtools/clang/compiler-rt-sanitizers_git.bb b/recipes-devtools/clang/compiler-rt-sanitizers_git.bb
index 8b937e0..b41cf2a 100644
--- a/recipes-devtools/clang/compiler-rt-sanitizers_git.bb
+++ b/recipes-devtools/clang/compiler-rt-sanitizers_git.bb
@@ -50,6 +50,10 @@ EXTRA_OECMAKE += "-DCMAKE_BUILD_TYPE=RelWithDebInfo \
                   -DLLVM_LIBDIR_SUFFIX=${LLVM_LIBDIR_SUFFIX} \
 "
 
+EXTRA_OECMAKE:append:class-native = "\
+               -DCOMPILER_RT_USE_BUILTINS_LIBRARY=OFF \
+"
+
 EXTRA_OECMAKE:append:class-nativesdk = "\
                -DCMAKE_RANLIB=${STAGING_BINDIR_TOOLCHAIN}/${TARGET_PREFIX}llvm-ranlib \
                -DCMAKE_AR=${STAGING_BINDIR_TOOLCHAIN}/${TARGET_PREFIX}llvm-ar \