Merge pull request #18 from threeal/use-clang-as-compiler

Test Specified Compiler With Clang on Multiple Platforms

.github/workflows/test.yml

@@ -55,38 +55,26 @@ jobs:
         run: build/test_c && build/test_cpp
 
   use-action-with-specified-compiler:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        lang: [C, CXX]
+        os: [windows-latest, ubuntu-latest, macos-latest]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3.3.0
 
-      - name: Use this action with specified invalid compiler
-        id: failed_step
-        continue-on-error: true
-        uses: ./
-        with:
-          source-dir: test
-          c-compiler: ${{ matrix.lang == 'C' && 'invalid' || '' }}
-          cxx-compiler: ${{ matrix.lang == 'CXX' && 'invalid' || '' }}
-
-      - name: Check if previous step is failing
-        run: ${{ steps.failed_step.outcome == 'failure' && 'true' || 'false' }}
-
       - name: Use this action with specified compiler
         uses: ./
         with:
           source-dir: test
-          c-compiler: ${{ matrix.lang == 'C' && 'clang' || '' }}
-          cxx-compiler: ${{ matrix.lang == 'CXX' && 'clang++' || '' }}
-          args: |
-            -D BUILD_C=${{ matrix.lang == 'C' && 'ON' || 'OFF' }}
-            -D BUILD_CXX=${{ matrix.lang == 'CXX' && 'ON' || 'OFF' }}
+          targets: test_c test_cpp
+          generator: Ninja
+          c-compiler: clang
+          cxx-compiler: clang++
+          args: -D CHECK_USING_CLANG=ON
 
       - name: Run build result
-        run: build/${{ matrix.lang == 'C' && 'hello_world_c' || 'hello_world' }}
+        run: build/test_c && build/test_cpp
 
   use-action-with-specified-generator:
     runs-on: ${{ matrix.os }}

test/CMakeLists.txt

@@ -1,16 +1,17 @@
 cmake_minimum_required(VERSION 3.0)
 project(test)
 
-option(BUILD_C "build hello world in C Language" OFF)
-option(BUILD_CXX "build hello world in CXX Language" ON)
+option(CHECK_USING_CLANG "check if target is compiled using Clang" OFF)
 
-if(BUILD_C)
-  add_executable(hello_world_c hello_world.c)
-endif()
-
-if(BUILD_CXX)
 add_executable(hello_world hello_world.cpp)
-endif()
 
-add_executable(test_c EXCLUDE_FROM_ALL test.c)
-add_executable(test_cpp EXCLUDE_FROM_ALL test.cpp)
+list(APPEND LANGS c cpp)
+foreach(LANG ${LANGS})
+  configure_file(test.in ${CMAKE_CURRENT_BINARY_DIR}/test.${LANG})
+  add_executable(test_${LANG} EXCLUDE_FROM_ALL ${CMAKE_CURRENT_BINARY_DIR}/test.${LANG})
+  target_compile_definitions(
+    test_${LANG} PRIVATE
+    $<$<STREQUAL:"${LANG}","c">:IS_C>
+    $<$<BOOL:${CHECK_USING_CLANG}>:CHECK_USING_CLANG>
+  )
+endforeach()

test/hello_world.c

@@ -1,6 +0,0 @@
-#include <stdio.h>
-
-int main() {
-  printf("Hello world!\n");
-  return 0;
-}

test/test.c

@@ -1,6 +0,0 @@
-#include <stdio.h>
-
-int main() {
-  printf("all ok\n");
-  return 0;
-}

test/test.cpp

@@ -1,6 +0,0 @@
-#include <iostream>
-
-int main() {
-  std::cout << "all ok" << std::endl;
-  return 0;
-}

test/test.in

@@ -0,0 +1,16 @@
+#ifdef IS_C
+#include <stdio.h>
+#define PRINT(STR) printf(STR); printf("\n")
+#else
+#include <iostream>
+#define PRINT(STR) std::cout << STR << std::endl
+#endif
+
+int main() {
+#if defined(CHECK_USING_CLANG) && !defined(__clang__)
+  PRINT("compiler is not clang");
+  return 1;
+#endif
+  PRINT("all ok");
+  return 0;
+}