clang: Set -DLLVM_APPEND_VC_REV=OFF

Fixes Issue #991

If this is not disabled, the build tries to use CMake magic to compute
repository and sha1 its building, however in case of OE it gets it
completely wrong when building from tarball, because its building under
TMPDIR which maybe a directory under main repo checkout e.g. poky tree
so it traverses up and finds the sha of poky and assumes that its building
from a git tree instead of tarball and emits the version control info into
clang -v output e.g.

❯ ../image/mnt/b/yoe/master/build/tmp/work/x86_64-linux/clang-native/20.0.0/recipe-sysroot-native/usr/bin/clang -v
clang version 20.0.0 (/home/kraj/work/llvm-project f133c59b33a749dc6d5fa8fb9a2366b95ea45068)

This can contain buildpaths since work-shared is where llvm sources will be and they
will appear here.

Therefore, avoid cmake trying to do this and we get good clean version info

> ../recipe-sysroot-native/usr/bin/aarch64-yoe-linux/aarch64-yoe-linux-clang
clang version 20.0.0

This will also avoid emitting buildpaths into debuginfo in some cases where
compiler version is emitted into build.id info

Signed-off-by: Khem Raj <raj.khem@gmail.com>

6 files changed, 6 insertions, 0 deletions

diff --git a/recipes-devtools/clang/clang_git.bb b/recipes-devtools/clang/clang_git.bb
index 88ae329..7b9096a 100644
--- a/recipes-devtools/clang/clang_git.bb
+++ b/recipes-devtools/clang/clang_git.bb
@@ -133,6 +133,7 @@ SOLIBSDEV:mingw32 = ".pyd"
 #CMAKE_VERBOSE = "VERBOSE=1"
 
 EXTRA_OECMAKE += "-DLLVM_ENABLE_ASSERTIONS=OFF \
+                  -DLLVM_APPEND_VC_REV=OFF \
                   -DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF \
                   -DLLVM_ENABLE_EXPENSIVE_CHECKS=OFF \
                   -DLLVM_ENABLE_PIC=ON \
diff --git a/recipes-devtools/clang/compiler-rt-sanitizers_git.bb b/recipes-devtools/clang/compiler-rt-sanitizers_git.bb
index be01822..f866aa5 100644
--- a/recipes-devtools/clang/compiler-rt-sanitizers_git.bb
+++ b/recipes-devtools/clang/compiler-rt-sanitizers_git.bb
@@ -50,6 +50,7 @@ EXTRA_OECMAKE += "-DCMAKE_BUILD_TYPE=RelWithDebInfo \
                   -DCOMPILER_RT_BUILD_MEMPROF=ON \
                   -DLLVM_ENABLE_PROJECTS='compiler-rt' \
                   -DLLVM_LIBDIR_SUFFIX=${LLVM_LIBDIR_SUFFIX} \
+                  -DLLVM_APPEND_VC_REV=OFF \
 "
 
 EXTRA_OECMAKE:append:class-nativesdk = "\
diff --git a/recipes-devtools/clang/compiler-rt_git.bb b/recipes-devtools/clang/compiler-rt_git.bb
index 6ed9bc8..84878aa 100644
--- a/recipes-devtools/clang/compiler-rt_git.bb
+++ b/recipes-devtools/clang/compiler-rt_git.bb
@@ -70,6 +70,7 @@ EXTRA_OECMAKE += "-DCMAKE_BUILD_TYPE=RelWithDebInfo \
                   -DCOMPILER_RT_BUILD_LIBFUZZER=OFF \
                   -DLLVM_ENABLE_PROJECTS='compiler-rt' \
                   -DLLVM_LIBDIR_SUFFIX=${LLVM_LIBDIR_SUFFIX} \
+                  -DLLVM_APPEND_VC_REV=OFF \
 "
 EXTRA_OECMAKE:append:class-target = "\
                -DCMAKE_RANLIB=${STAGING_BINDIR_TOOLCHAIN}/${TARGET_PREFIX}llvm-ranlib \
diff --git a/recipes-devtools/clang/libclc_git.bb b/recipes-devtools/clang/libclc_git.bb
index 1f30c54..16ab833 100644
--- a/recipes-devtools/clang/libclc_git.bb
+++ b/recipes-devtools/clang/libclc_git.bb
@@ -16,6 +16,7 @@ DEPENDS += "clang spirv-tools spirv-llvm-translator spirv-llvm-translator-native
 OECMAKE_SOURCEPATH = "${S}/libclc"
 
 EXTRA_OECMAKE += "\
+    -DLLVM_APPEND_VC_REV=OFF \
     -DLIBCLC_CUSTOM_LLVM_TOOLS_BINARY_DIR=${STAGING_BINDIR_NATIVE} \
     -DLLVM_CLANG=${STAGING_BINDIR_NATIVE}/clang \
     -DLLVM_AS=${STAGING_BINDIR_NATIVE}/llvm-as \
diff --git a/recipes-devtools/clang/libcxx_git.bb b/recipes-devtools/clang/libcxx_git.bb
index 280f3d6..8b57dfc 100644
--- a/recipes-devtools/clang/libcxx_git.bb
+++ b/recipes-devtools/clang/libcxx_git.bb
@@ -72,6 +72,7 @@ EXTRA_OECMAKE += "\
                   -DLLVM_ENABLE_RUNTIMES='libcxx;libcxxabi;libunwind' \
                   -DLLVM_RUNTIME_TARGETS=${HOST_SYS} \
                   -DLLVM_LIBDIR_SUFFIX=${LLVM_LIBDIR_SUFFIX} \
+                  -DLLVM_APPEND_VC_REV=OFF \
                   -DCMAKE_BUILD_WITH_INSTALL_RPATH=ON \
 "
 
diff --git a/recipes-devtools/clang/openmp_git.bb b/recipes-devtools/clang/openmp_git.bb
index 865dbe6..34f6e4a 100644
--- a/recipes-devtools/clang/openmp_git.bb
+++ b/recipes-devtools/clang/openmp_git.bb
@@ -17,6 +17,7 @@ inherit cmake pkgconfig perlnative python3native python3targetconfig
 DEPENDS += "elfutils libffi clang"
 
 EXTRA_OECMAKE += "-DCMAKE_BUILD_TYPE=RelWithDebInfo \
+                  -DLLVM_APPEND_VC_REV=OFF \
                   -DLLVM_ENABLE_PER_TARGET_RUNTIME_DIR=OFF \
                   -DOPENMP_LIBDIR_SUFFIX=${@d.getVar('baselib').replace('lib', '')} \
                   -DOPENMP_STANDALONE_BUILD=ON \