Make: Apple's libSystem contains Blocks runtime

Author: ashvardanian

.github/workflows/prerelease.yml

@@ -176,24 +176,23 @@ jobs:
           brew update
           brew reinstall cmake llvm@${{ matrix.llvm }}
 
-      - name: Configure (CMake)
+      - name: Build C/C++
         run: |
           cmake -S . -B build_artifacts -D CMAKE_BUILD_TYPE=${{ matrix.config }} -D CMAKE_CXX_COMPILER=$(brew --prefix llvm@${{ matrix.llvm }})/bin/clang++
+          cmake --build build_artifacts --config ${{ matrix.config }} --parallel
 
-      - name: Build
-        run: cmake --build build_artifacts --config ${{ matrix.config }} --parallel
-
-      - name: Run C++ tests
+      - name: Test C++
         run: |
           set -euxo pipefail
           build_artifacts/fork_union_test_cpp17
           build_artifacts/fork_union_test_cpp20
           build_artifacts/fork_union_test_cpp23
 
-      - name: Run C API tests
+      - name: Test C
         run: |
           set -euxo pipefail
           build_artifacts/fork_union_test_c11
+          build_artifacts/fork_union_test_c_clang_blocks
 
   test_windows:
     name: Windows

scripts/CMakeLists.txt

@@ -12,9 +12,8 @@ function (set_target_properties_for_fork_union_script target_name)
     if (CMAKE_BUILD_TYPE STREQUAL "Release")
         message(STATUS "Enabling optimizations for ${target_name}")
         target_compile_options(
-            ${target_name}
-            PRIVATE $<$<CXX_COMPILER_ID:GNU,Clang,AppleClang>:-O3 -march=native -mtune=native>
-                    $<$<CXX_COMPILER_ID:MSVC>:/O2 /Ob3>
+            ${target_name} PRIVATE $<$<CXX_COMPILER_ID:GNU,Clang,AppleClang>:-O3 -march=native -mtune=native>
+                                   $<$<CXX_COMPILER_ID:MSVC>:/O2 /Ob3>
         )
     endif ()
 
@@ -111,7 +110,7 @@ if (CMAKE_C_COMPILER_ID STREQUAL "GNU")
 endif ()
 
 # Clang blocks extension test
-if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
+if (CMAKE_C_COMPILER_ID STREQUAL "Clang" OR CMAKE_C_COMPILER_ID STREQUAL "AppleClang")
     add_executable(fork_union_test_c_clang_blocks test.c)
     set_target_properties(
         fork_union_test_c_clang_blocks
@@ -124,10 +123,10 @@ if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
     target_link_libraries(fork_union_test_c_clang_blocks PRIVATE fork_union_static)
     add_test(NAME fork_union_test_c_clang_blocks COMMAND fork_union_test_c_clang_blocks)
 
-    if (UNIX AND NOT APPLE)
+    if (APPLE)
+        # Apple's `libSystem` already ships the Blocks runtime, so no extra linkage is required
+    elseif (UNIX)
         target_link_libraries(fork_union_test_c_clang_blocks PRIVATE -latomic -lBlocksRuntime)
-    else ()
-        target_link_libraries(fork_union_test_c_clang_blocks PRIVATE -lBlocksRuntime)
     endif ()
 endif ()
 
@@ -150,8 +149,7 @@ elseif (CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang" OR CMAKE_CXX_COMPILER_ID STR
         execute_process(
             COMMAND ${BREW_EXECUTABLE} --prefix libomp
             OUTPUT_VARIABLE LIBOMP_PREFIX
-            OUTPUT_STRIP_TRAILING_WHITESPACE
-            ERROR_QUIET
+            OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET
         )
         if (LIBOMP_PREFIX AND EXISTS "${LIBOMP_PREFIX}/include/omp.h")
             message(STATUS "Enabling OpenMP for fork_union_nbody on Clang with Homebrew libomp")