From 2a4e8f03ef602969e9691b4f2c35fc7602ccc856 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D9=85=D9=87=D8=AF=D9=8A=20=D8=B4=D9=8A=D9=86=D9=88=D9=86?=
 =?UTF-8?q?=20=28Mehdi=20Chinoune=29?= <mehdi.chinoune@hotmail.com>
Date: Mon, 12 Feb 2024 18:12:25 +0100
Subject: MinGW: Add support for OBJC and OBJCXX

---
 Help/release/3.29.rst                         |  5 +++++
 Modules/Platform/Windows-Clang-OBJC.cmake     | 18 ++++++++++++++++++
 Modules/Platform/Windows-Clang-OBJCXX.cmake   | 18 ++++++++++++++++++
 Modules/Platform/Windows-GNU-OBJC-ABI.cmake   |  1 +
 Modules/Platform/Windows-GNU-OBJC.cmake       |  2 ++
 Modules/Platform/Windows-GNU-OBJCXX-ABI.cmake |  1 +
 Modules/Platform/Windows-GNU-OBJCXX.cmake     |  2 ++
 7 files changed, 47 insertions(+)
 create mode 100644 Modules/Platform/Windows-Clang-OBJC.cmake
 create mode 100644 Modules/Platform/Windows-Clang-OBJCXX.cmake
 create mode 100644 Modules/Platform/Windows-GNU-OBJC-ABI.cmake
 create mode 100644 Modules/Platform/Windows-GNU-OBJC.cmake
 create mode 100644 Modules/Platform/Windows-GNU-OBJCXX-ABI.cmake
 create mode 100644 Modules/Platform/Windows-GNU-OBJCXX.cmake

diff --git a/Help/release/3.29.rst b/Help/release/3.29.rst
index 96f161f..659237e 100644
--- a/Help/release/3.29.rst
+++ b/Help/release/3.29.rst
@@ -39,6 +39,11 @@ Compilers
 * The LLVM/Clang GNU-like frontend on Windows (``clang++``) may now be used
   to compile ``CUDA`` language sources.
 
+* Compilers targeting the GNU ABI on Windows (MinGW) may now be used to
+  compile Objective C (``OBJC``) and Objective C++ (``OBJCXX``).  These
+  include GNU compilers (``gcc`` and ``g++``) and the LLVM/Clang GNU-like
+  frontends (``clang`` and ``clang++``).
+
 * TI Clang-based compilers are now supported with
   :variable:`compiler id <CMAKE_<LANG>_COMPILER_ID>` ``TIClang``.
 
diff --git a/Modules/Platform/Windows-Clang-OBJC.cmake b/Modules/Platform/Windows-Clang-OBJC.cmake
new file mode 100644
index 0000000..7babb98
--- /dev/null
+++ b/Modules/Platform/Windows-Clang-OBJC.cmake
@@ -0,0 +1,18 @@
+include(Platform/Windows-Clang)
+__windows_compiler_clang(OBJC)
+
+if("x${CMAKE_OBJC_COMPILER_FRONTEND_VARIANT}" STREQUAL "xMSVC")
+  if((NOT DEFINED CMAKE_DEPENDS_USE_COMPILER OR CMAKE_DEPENDS_USE_COMPILER)
+      AND CMAKE_GENERATOR MATCHES "Makefiles|WMake"
+      AND CMAKE_DEPFILE_FLAGS_OBJC)
+    set(CMAKE_OBJC_DEPENDS_USE_COMPILER TRUE)
+  endif()
+elseif("x${CMAKE_OBJC_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
+  if((NOT DEFINED CMAKE_DEPENDS_USE_COMPILER OR CMAKE_DEPENDS_USE_COMPILER)
+      AND CMAKE_GENERATOR MATCHES "Makefiles|WMake"
+      AND CMAKE_DEPFILE_FLAGS_OBJC)
+    # dependencies are computed by the compiler itself
+    set(CMAKE_OBJC_DEPFILE_FORMAT gcc)
+    set(CMAKE_OBJC_DEPENDS_USE_COMPILER TRUE)
+  endif()
+endif()
diff --git a/Modules/Platform/Windows-Clang-OBJCXX.cmake b/Modules/Platform/Windows-Clang-OBJCXX.cmake
new file mode 100644
index 0000000..3bc1673
--- /dev/null
+++ b/Modules/Platform/Windows-Clang-OBJCXX.cmake
@@ -0,0 +1,18 @@
+include(Platform/Windows-Clang)
+__windows_compiler_clang(OBJCXX)
+
+if("x${CMAKE_OBJCXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "xMSVC")
+  if((NOT DEFINED CMAKE_DEPENDS_USE_COMPILER OR CMAKE_DEPENDS_USE_COMPILER)
+      AND CMAKE_GENERATOR MATCHES "Makefiles|WMake"
+      AND CMAKE_DEPFILE_FLAGS_OBJCXX)
+    set(CMAKE_OBJCXX_DEPENDS_USE_COMPILER TRUE)
+  endif()
+elseif("x${CMAKE_OBJCXX_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
+  if((NOT DEFINED CMAKE_DEPENDS_USE_COMPILER OR CMAKE_DEPENDS_USE_COMPILER)
+      AND CMAKE_GENERATOR MATCHES "Makefiles|WMake"
+      AND CMAKE_DEPFILE_FLAGS_OBJCXX)
+    # dependencies are computed by the compiler itself
+    set(CMAKE_OBJCXX_DEPFILE_FORMAT gcc)
+    set(CMAKE_OBJCXX_DEPENDS_USE_COMPILER TRUE)
+  endif()
+endif()
diff --git a/Modules/Platform/Windows-GNU-OBJC-ABI.cmake b/Modules/Platform/Windows-GNU-OBJC-ABI.cmake
new file mode 100644
index 0000000..c8b2ea6
--- /dev/null
+++ b/Modules/Platform/Windows-GNU-OBJC-ABI.cmake
@@ -0,0 +1 @@
+__windows_compiler_gnu_abi(OBJC)
diff --git a/Modules/Platform/Windows-GNU-OBJC.cmake b/Modules/Platform/Windows-GNU-OBJC.cmake
new file mode 100644
index 0000000..42cf3f8
--- /dev/null
+++ b/Modules/Platform/Windows-GNU-OBJC.cmake
@@ -0,0 +1,2 @@
+include(Platform/Windows-GNU)
+__windows_compiler_gnu(OBJC)
diff --git a/Modules/Platform/Windows-GNU-OBJCXX-ABI.cmake b/Modules/Platform/Windows-GNU-OBJCXX-ABI.cmake
new file mode 100644
index 0000000..9a11514
--- /dev/null
+++ b/Modules/Platform/Windows-GNU-OBJCXX-ABI.cmake
@@ -0,0 +1 @@
+__windows_compiler_gnu_abi(OBJCXX)
diff --git a/Modules/Platform/Windows-GNU-OBJCXX.cmake b/Modules/Platform/Windows-GNU-OBJCXX.cmake
new file mode 100644
index 0000000..072cf28
--- /dev/null
+++ b/Modules/Platform/Windows-GNU-OBJCXX.cmake
@@ -0,0 +1,2 @@
+include(Platform/Windows-GNU)
+__windows_compiler_gnu(OBJCXX)
-- 
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