tools: fix tools/make-v8.sh for clang

Update `tools/make-v8.sh` so that it can work with either `gcc` or
`clang`.

Adds:
- clang settings when CC/CXX environment variables set to clang/clang++.
- Turns off warnings as errors.

Removes:
- goma settings.
- Machine specific settings (moved to Jenkins job configuration).

Refs: https://chromium-review.googlesource.com/c/v8/v8/+/5541431
PR-URL: #59893
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: richardlau

tools/make-v8.sh

@@ -20,37 +20,19 @@ if [ "$ARCH" = "s390x" ] || [ "$ARCH" = "ppc64le" ]; then
   if [ "$ARCH" = "ppc64le" ]; then
     TARGET_ARCH="ppc64"
   fi
-  # set paths manually for now to use locally installed gn
-  export BUILD_TOOLS=/home/iojs/build-tools
-  export LD_LIBRARY_PATH="$BUILD_TOOLS:$LD_LIBRARY_PATH"
-  rm -f "$BUILD_TOOLS/g++"
-  rm -f "$BUILD_TOOLS/gcc"
-  # V8's build config looks for binaries called `gcc` and `g++` if not using
-  # clang. Ensure that `gcc` and `g++` point to the compilers we want to
-  # invoke, creating symbolic links placed at the front of PATH, if needed.
-  # Avoid linking to ccache symbolic links as ccache decides which binary
-  # to run based on the name of the link (i.e. `gcc`/`g++` in our case).
-  # shellcheck disable=SC2154
-  if [ "$CC" != "" ] && [ "$CC" != "gcc" ]; then
-    CC_PATH=$(command -v "$CC" gcc | grep -v ccache | head -n 1)
-    ln -s "$CC_PATH" "$BUILD_TOOLS/gcc"
-  fi
-  # shellcheck disable=SC2154
-  if [ "$CXX" != "" ] && [ "$CXX" != "g++" ]; then
-    CXX_PATH=$(command -v "$CXX" g++ | grep -v ccache | head -n 1)
-    ln -s "$CXX_PATH" "$BUILD_TOOLS/g++"
-  fi
-  export PATH="$BUILD_TOOLS:$PATH"
   # Propagate ccache to gn.
+  # shellcheck disable=SC2154
   case "$CXX" in
     *ccache*) CC_WRAPPER="cc_wrapper=\"ccache\"" ;;
     *) ;;
   esac
 
-  g++ --version
-  gcc --version
-  export PKG_CONFIG_PATH=$BUILD_TOOLS/pkg-config
-  gn gen -v "out.gn/$BUILD_ARCH_TYPE" --args="is_component_build=false is_debug=false use_goma=false goma_dir=\"None\" use_custom_libcxx=false v8_target_cpu=\"$TARGET_ARCH\" target_cpu=\"$TARGET_ARCH\" v8_enable_backtrace=true $CC_WRAPPER"
+  # shellcheck disable=SC2154
+  case "$CXX" in
+    *clang*) GN_COMPILER_OPTS="is_clang=true clang_base_path=\"/usr\" clang_use_chrome_plugins=false treat_warnings_as_errors=false use_custom_libcxx=false" ;;
+    *) GN_COMPILER_OPTS="treat_warnings_as_errors=false use_custom_libcxx=false" ;;
+  esac
+  gn gen -v "out.gn/$BUILD_ARCH_TYPE" --args="$GN_COMPILER_OPTS is_component_build=false is_debug=false v8_target_cpu=\"$TARGET_ARCH\" target_cpu=\"$TARGET_ARCH\" v8_enable_backtrace=true $CC_WRAPPER"
   ninja -v -C "out.gn/$BUILD_ARCH_TYPE" "${JOBS_ARG}" d8 cctest inspector-test
 else
   DEPOT_TOOLS_DIR="$(cd depot_tools && pwd)"