build: Try to link in ASan runtime using linkopt a la Sorbet

.bazelrc

@@ -43,3 +43,9 @@ build:dev --copt="-Wno-macro-redefined"
 # -D_FORTIFY_SOURCE=1 by default. This is fixed by
 # https://github.com/bazelbuild/bazel/pull/12772
 # but I can't figure out how to use that, so hack it in for now.
+
+build:dev-macos --config=dev
+build:dev-macos --linkopt="external/llvm_toolchain_llvm/lib/clang/15.0.6/lib/darwin/libclang_rt.asan_osx_dynamic.dylib"
+
+build:dev-linux --config=dev
+build:dev-linux --linkopt="external/llvm_toolchain_llvm/lib/clang/15.0.6/lib/linux/libclang_rt.asan_osx_dynamic.dylib"

Development.md

@@ -33,12 +33,14 @@ but it will not be used for building the code in this project.)
 
 ```
 # macOS
-bazel build //... --spawn_strategy=local --config=dev
+bazel build //... --spawn_strategy=local --config=dev-macos
 
 # Linux
-bazel build //... --config=dev
+bazel build //... --config=dev-linux
 ```
 
+(Later commands use `dev-macos` consistently for simplicity.)
+
 The indexer binary will be placed at `bazel-bin/indexer/scip-clang`.
 
 On macOS, `--spawn_strategy=local` provides a dramatic improvement
@@ -63,13 +65,13 @@ Consult `--help` for user-facing flags, and `--help-all` for both user-facing an
 Run all tests:
 
 ```bash
-bazel test //test --spawn_strategy=local --config=dev
+bazel test //test --spawn_strategy=local --config=dev-macos
 ```
 
 Update snapshot tests:
 
 ```bash
-bazel test //update --spawn_strategy=local --config=dev
+bazel test //update --spawn_strategy=local --config=dev-macos
 ```
 
 ## Formatting

tools/regenerate-compdb.sh

@@ -1,5 +1,11 @@
 #!/usr/bin/env bash
-bazel build //tools:compdb --spawn_strategy=local --config=dev
+
+SUFFIX="linux"
+if [ "$(uname)" == "Darwin" ]; then
+  SUFFIX="macos"
+fi
+
+bazel build //tools:compdb --spawn_strategy=local "--config=dev-$SUFFIX"
 
 PROJECT_ROOT="$(dirname "${BASH_SOURCE[0]}")/.."