Use host toolchain for all mac and ios targets (project-chip#32283)

* Use host toolchain for all mac and ios targets.

* Fix ASAN options for clang build

* Collect .ips files from the system directory as well

.github/workflows/darwin.yaml

@@ -119,13 +119,10 @@ jobs:
               run: |
                   xcodebuild -target "MatterTvCastingBridge" -sdk iphoneos
               working-directory: examples/tv-casting-app/darwin/MatterTvCastingBridge
-            - name: Uploading .ips files in Xcode derived data to debug the failure
-              uses: actions/upload-artifact@v4
-              if: ${{ failure() && !env.ACT }}
-              with:
-                  name: darwin-framework-derived-data
-                  path: ~/Library/Developer/Xcode/DerivedData/**/*.ips
-                  retention-days: 5
+            - name: Collect crash logs
+              run: |
+                  mkdir -p /tmp/darwin/framework-tests
+                  find ~/Library/Developer/Xcode/DerivedData /Library/Logs/DiagnosticReports -name '*.ips' -print0 | xargs -0 -J % cp % /tmp/darwin/framework-tests
             - name: Uploading log files
               uses: actions/upload-artifact@v4
               if: ${{ failure() && !env.ACT }}

build/config/BUILDCONFIG.gn

@@ -76,11 +76,11 @@ if (_chip_defaults.custom_toolchain != "") {
   } else {
     _target_compiler = "gcc"
   }
-
   _default_toolchain = "${_build_overrides.build_root}/toolchain/linux:linux_${target_cpu}_${_target_compiler}"
-} else if (target_os == host_os &&
-           (target_cpu == host_cpu ||
-            (target_cpu == "arm64e" && host_cpu == "arm64"))) {
+} else if (host_os == "mac" && (target_os == "mac" || target_os == "ios")) {
+  # On Mac the host toolchain supports building for all mac and ios targets
+  _default_toolchain = host_toolchain
+} else if (target_os == host_os && target_cpu == host_cpu) {
   _default_toolchain = host_toolchain
 } else if (target_os == "freertos") {
   if (_chip_defaults.is_clang) {
@@ -113,9 +113,6 @@ if (_chip_defaults.custom_toolchain != "") {
   } else {
     assert(false, "Unsupported target_cpu: ${current_cpu}")
   }
-} else if (target_os == "ios") {
-  _default_toolchain =
-      "${_build_overrides.build_root}/toolchain/ios:ios_${target_cpu}"
 } else if (target_os == "tizen") {
   _default_toolchain =
       "${_build_overrides.build_root}/toolchain/tizen:tizen_${target_cpu}"

build/config/compiler/BUILD.gn

@@ -343,7 +343,7 @@ config("cosmetic_default") {
 }
 
 config("runtime_default") {
-  if (is_clang) {
+  if (is_clang) {  # Using Pigweed clang instead of Darwin host clang
     configs = [
       "$dir_pw_toolchain/host_clang:no_system_libcpp",
       "$dir_pw_toolchain/host_clang:xcode_sysroot",
@@ -402,7 +402,7 @@ config("sanitize_address") {
   ]
   ldflags = cflags
 
-  if (target_os == "mac" || target_os == "ios") {
+  if ((target_os == "mac" || target_os == "ios") && !is_clang) {
     defines += [ "_LIBCPP_HAS_NO_ASAN" ]
   }
 }

examples/darwin-framework-tool/BUILD.gn

@@ -139,6 +139,7 @@ action("build-darwin-framework") {
 config("config") {
   include_dirs = [
     ".",
+    "include",
     "${chip_root}/examples/common",
     "${chip_root}/examples/darwin-framework-tool/commands/common",
     "${chip_root}/zzz_generated/darwin-framework-tool",