tools: unify make-v8.sh for ppc64le and s390x

Refactor `tools/make-v8.sh` to minimise differences between the
`ppc64le` and `s390x` paths to allow us to enable `ccache` on the
`ppc64le` machines in the CI.

PR-URL: #31628
Refs: nodejs/build#1927
Refs: nodejs/build#1940
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>

tools/make-v8.sh

@@ -8,35 +8,28 @@ tools/node/fetch_deps.py .
 
 ARCH="`arch`"
 if [[ "$ARCH" == "s390x" ]] || [[ "$ARCH" == "ppc64le" ]]; then
+  TARGET_ARCH=$ARCH
+  if [[ "$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
-  export PATH=$BUILD_TOOLS:$PATH
-  if [[ X"$CXX" != X ]]; then
-    CXX_PATH=`which $CXX |grep g++`
-  fi
-  if [[ X"$CC" != X ]]; then
-    CC_PATH=`which $CC |grep gcc`
-  fi
+  # Avoid linking to ccache symbolic links as ccache decides which
+  # binary to run based on the name of the link (we always name them gcc/g++).
+  CC_PATH=`which -a $CC gcc | grep -v ccache | head -n 1`
+  CXX_PATH=`which -a $CXX g++ | grep -v ccache | head -n 1`
   rm -f "$BUILD_TOOLS/g++"
   rm -f "$BUILD_TOOLS/gcc"
-fi
-if [[ "$ARCH" == "s390x" ]]; then
   ln -s $CXX_PATH "$BUILD_TOOLS/g++"
   ln -s $CC_PATH "$BUILD_TOOLS/gcc"
+  export PATH=$BUILD_TOOLS:$PATH
+
   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="s390x" target_cpu="s390x"'
+  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=\"$TARGET_ARCH\""
   ninja -v -C out.gn/$BUILD_ARCH_TYPE d8 cctest inspector-test
-elif [[ "$ARCH" == "ppc64le" ]]; then
-  if [[ X"$CXX" != X ]]; then
-    ln -s /usr/bin/$CXX "$BUILD_TOOLS/g++"
-    ln -s /usr/bin/$CC "$BUILD_TOOLS/gcc"
-  fi
-  g++ --version
-  export PKG_CONFIG_PATH=$BUILD_TOOLS/pkg-config-files
-  gn gen out.gn/$BUILD_ARCH_TYPE --args='is_component_build=false is_debug=false use_goma=false goma_dir="None" use_custom_libcxx=false v8_target_cpu="ppc64" target_cpu="ppc64"'
-  ninja -C out.gn/$BUILD_ARCH_TYPE d8 cctest inspector-test
 else
   PATH=~/_depot_tools:$PATH tools/dev/v8gen.py $BUILD_ARCH_TYPE --no-goma $V8_BUILD_OPTIONS
   PATH=~/_depot_tools:$PATH ninja -C out.gn/$BUILD_ARCH_TYPE/ d8 cctest inspector-test