clang: consolidate LLVM_APPEND_VC_REV=OFF

Whilst the change to add TMPDIR to GIT_CEILING_DIRECTORIES should stop
LLVM from embedding git information into the recipes, also disable this
behaviour explicitly.

We do this because it's not just the sha of the source tree but also
the full URL of the repository, which would be an information leak if
an internal git mirror was being used.

(From OE-Core rev: 9247e242bf0e2384142427b67e5f1f7b4018c45d)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/clang/clang_git.bb

@@ -57,7 +57,6 @@ SOLIBSDEV:mingw32 = ".pyd"
 #CMAKE_VERBOSE = "VERBOSE=1"
 
 EXTRA_OECMAKE += "-DLLVM_ENABLE_ASSERTIONS=OFF \
-                  -DLLVM_APPEND_VC_REV=OFF \
                   -DLLVM_ENABLE_PIC=ON \
                   -DCLANG_DEFAULT_PIE_ON_LINUX=ON \
                   -DFFI_INCLUDE_DIR=$(pkg-config --variable=includedir libffi) \

meta/recipes-devtools/clang/common-clang.inc

@@ -48,4 +48,8 @@ def get_clang_target_arch(bb, d):
 # install they cause non-deterministic binaries.
 EXTRA_OECMAKE += "-DCMAKE_BUILD_WITH_INSTALL_RPATH=ON"
 
+# Don't embed found git information into the version string as this
+# will include the git server URL.
+EXTRA_OECMAKE += "-DLLVM_APPEND_VC_REV=OFF"
+
 require common.inc

meta/recipes-devtools/clang/openmp_git.bb

@@ -18,7 +18,6 @@ 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 \