ObjC: Add _COMPILE_LAUNCHER support

Fixes: #20178

Help/prop_tgt/LANG_COMPILER_LAUNCHER.rst

@@ -2,7 +2,7 @@
 ------------------------
 
 This property is implemented only when ``<LANG>`` is ``C``, ``CXX``,
-``Fortran``, or ``CUDA``.
+``Fortran``, ``OBJC``, ``OBJCXX``, or ``CUDA``.
 
 Specify a :ref:`semicolon-separated list <CMake Language Lists>` containing a command line
 for a compiler launching tool. The :ref:`Makefile Generators` and the

Help/variable/CMAKE_LANG_COMPILER_LAUNCHER.rst

@@ -4,4 +4,4 @@ CMAKE_<LANG>_COMPILER_LAUNCHER
 Default value for :prop_tgt:`<LANG>_COMPILER_LAUNCHER` target property.
 This variable is used to initialize the property on each target as it is
 created.  This is done only when ``<LANG>`` is ``C``, ``CXX``, ``Fortran``,
-or ``CUDA``.
+``OBJC``, ``OBJCXX``, or ``CUDA``.

Source/cmMakefileTargetGenerator.cxx

@@ -733,8 +733,8 @@ void cmMakefileTargetGenerator::WriteObjectRuleFiles(
     // See if we need to use a compiler launcher like ccache or distcc
     std::string compilerLauncher;
     if (!compileCommands.empty() &&
-        (lang == "C" || lang == "CXX" || lang == "Fortran" ||
-         lang == "CUDA")) {
+        (lang == "C" || lang == "CXX" || lang == "Fortran" || lang == "CUDA" ||
+         lang == "OBJC" || lang == "OBJCXX")) {
       std::string const clauncher_prop = lang + "_COMPILER_LAUNCHER";
       const char* clauncher =
         this->GeneratorTarget->GetProperty(clauncher_prop);

Source/cmNinjaTargetGenerator.cxx

@@ -702,7 +702,8 @@ void cmNinjaTargetGenerator::WriteCompileRule(const std::string& lang)
   // See if we need to use a compiler launcher like ccache or distcc
   std::string compilerLauncher;
   if (!compileCmds.empty() &&
-      (lang == "C" || lang == "CXX" || lang == "Fortran" || lang == "CUDA")) {
+      (lang == "C" || lang == "CXX" || lang == "Fortran" || lang == "CUDA" ||
+       lang == "OBJC" || lang == "OBJCXX")) {
     std::string const clauncher_prop = lang + "_COMPILER_LAUNCHER";
     const char* clauncher = this->GeneratorTarget->GetProperty(clauncher_prop);
     if (clauncher && *clauncher) {

Source/cmTarget.cxx

@@ -333,6 +333,7 @@ cmTarget::cmTarget(std::string const& name, cmStateEnums::TargetType type,
     initProp("C_STANDARD");
     initProp("C_STANDARD_REQUIRED");
     initProp("C_EXTENSIONS");
+    initProp("OBJC_COMPILER_LAUNCHER");
     initProp("OBJC_STANDARD");
     initProp("OBJC_STANDARD_REQUIRED");
     initProp("OBJC_EXTENSIONS");
@@ -344,6 +345,7 @@ cmTarget::cmTarget(std::string const& name, cmStateEnums::TargetType type,
     initProp("CXX_STANDARD");
     initProp("CXX_STANDARD_REQUIRED");
     initProp("CXX_EXTENSIONS");
+    initProp("OBJCXX_COMPILER_LAUNCHER");
     initProp("OBJCXX_STANDARD");
     initProp("OBJCXX_STANDARD_REQUIRED");
     initProp("OBJCXX_EXTENSIONS");

Tests/RunCMake/CMakeLists.txt

@@ -530,6 +530,9 @@ if("${CMAKE_GENERATOR}" MATCHES "Make|Ninja")
   if(CMAKE_Fortran_COMPILER)
     list(APPEND CompilerLauncher_ARGS -DCMake_TEST_Fortran=1)
   endif()
+  if (APPLE AND CMAKE_C_COMPILER_ID MATCHES "Clang|GNU")
+    list(APPEND CompilerLauncher_ARGS -DCMake_TEST_OBJC=1)
+  endif()
   add_RunCMake_test(CompilerLauncher)
   add_RunCMake_test(ctest_labels_for_subprojects)
 endif()

Tests/RunCMake/CompilerLauncher/OBJC-Build-stdout.txt

@@ -0,0 +1 @@
+.*-E env USED_LAUNCHER=1.*

Tests/RunCMake/CompilerLauncher/OBJC-launch-Build-stdout.txt

@@ -0,0 +1 @@
+.*-E env USED_LAUNCHER=1.*

Tests/RunCMake/CompilerLauncher/OBJC-launch.cmake

@@ -0,0 +1,3 @@
+set(CTEST_USE_LAUNCHERS 1)
+include(CTestUseLaunchers)
+include(OBJC.cmake)

Tests/RunCMake/CompilerLauncher/OBJC.cmake

@@ -0,0 +1,4 @@
+enable_language(OBJC)
+set(CMAKE_OBJC_COMPILER_LAUNCHER "${CMAKE_COMMAND};-E;env;USED_LAUNCHER=1")
+set(CMAKE_VERBOSE_MAKEFILE TRUE)
+add_executable(main main.m)

Tests/RunCMake/CompilerLauncher/OBJCXX-Build-stdout.txt

@@ -0,0 +1 @@
+.*-E env USED_LAUNCHER=1.*

Tests/RunCMake/CompilerLauncher/OBJCXX-launch-Build-stdout.txt

@@ -0,0 +1 @@
+.*-E env USED_LAUNCHER=1.*

Tests/RunCMake/CompilerLauncher/OBJCXX-launch.cmake

@@ -0,0 +1,3 @@
+set(CTEST_USE_LAUNCHERS 1)
+include(CTestUseLaunchers)
+include(OBJCXX.cmake)

Tests/RunCMake/CompilerLauncher/OBJCXX.cmake

@@ -0,0 +1,4 @@
+enable_language(OBJCXX)
+set(CMAKE_OBJCXX_COMPILER_LAUNCHER "${CMAKE_COMMAND};-E;env;USED_LAUNCHER=1")
+set(CMAKE_VERBOSE_MAKEFILE TRUE)
+add_executable(main main.mm)

Tests/RunCMake/CompilerLauncher/RunCMakeTest.cmake

@@ -22,6 +22,9 @@ endif()
 if(CMake_TEST_Fortran)
   list(APPEND langs Fortran)
 endif()
+if(CMake_TEST_OBJC)
+  list(APPEND langs OBJC OBJCXX)
+endif()
 
 foreach(lang ${langs})
   run_compiler_launcher(${lang})

Tests/RunCMake/CompilerLauncher/main.m

@@ -0,0 +1,4 @@
+int main(void)
+{
+  return 0;
+}

Tests/RunCMake/CompilerLauncher/main.mm

@@ -0,0 +1,4 @@
+int main()
+{
+  return 0;
+}