build: Use LTO for release builds on Linux (#281)

Author: varungandhi-src

.bazelrc

@@ -81,3 +81,6 @@ build:release -c opt
 build:release --copt="-DFORCE_DEBUG=1"
 build:release --copt="-O2"
 build:release --config=stacktraces
+
+build:release-linux --config=release --config=linux
+build:release-linux --cxxopt="-flto=thin" --linkopt="-flto=thin"

.github/workflows/release.yml

@@ -90,7 +90,13 @@ jobs:
             echo "build --remote_cache=$CI_BAZEL_REMOTE_CACHE --google_default_credentials"
           } > ci.bazelrc
           # Comment out the 'upload log' bit below for debugging
-          bazel build //indexer:scip-clang --config="$CONFIG" # --execution_log_binary_file=log
+          SUFFIX=""
+          if [ "$CONFIG" == "release" ]; then
+            if [ "$(uname -s)" == "Linux" ]; then
+              SUFFIX="-linux"
+            fi
+          fi
+          bazel build //indexer:scip-clang --config="$CONFIG$SUFFIX" # --execution_log_binary_file=log
           if [ "$RUNNER_OS" == "Linux" ]; then
             echo "--- GLIBC VERSIONS ---"
             objdump -T bazel-bin/indexer/scip-clang | grep GLIBC | sed 's/.*GLIBC_\([.0-9]*\).*/\1/g' | sort -Vu