Apple: Use CMAKE_EFFECTIVE_SYSTEM_NAME to share compiler info

Apple platforms macOS, iOS, tvOS, and watchOS can all share the same
compiler information.  Rename `Darwin-*` modules to `Apple-*` and load
them all through `CMAKE_EFFECTIVE_SYSTEM_NAME`.  This saves duplication
of 4 * 21 compiler information modules.

Issue: #17870

34 files changed, 42 insertions, 38 deletions

diff --git a/Modules/Platform/Darwin-Absoft-Fortran.cmake b/Modules/Platform/Apple-Absoft-Fortran.cmake
index 8caa202..8caa202 100644
--- a/Modules/Platform/Darwin-Absoft-Fortran.cmake
+++ b/Modules/Platform/Apple-Absoft-Fortran.cmake
diff --git a/Modules/Platform/Darwin-AppleClang-C.cmake b/Modules/Platform/Apple-AppleClang-C.cmake
index 3216b29..f45ccf4 100644
--- a/Modules/Platform/Darwin-AppleClang-C.cmake
+++ b/Modules/Platform/Apple-AppleClang-C.cmake
@@ -1,4 +1,4 @@
-include(Platform/Darwin-Clang-C)
+include(Platform/Apple-Clang-C)
 if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.2)
   set(CMAKE_C_SYSTEM_FRAMEWORK_SEARCH_FLAG "-iframework ")
 else()
diff --git a/Modules/Platform/Darwin-AppleClang-CXX.cmake b/Modules/Platform/Apple-AppleClang-CXX.cmake
index 3fedf8c..1128204 100644
--- a/Modules/Platform/Darwin-AppleClang-CXX.cmake
+++ b/Modules/Platform/Apple-AppleClang-CXX.cmake
@@ -1,4 +1,4 @@
-include(Platform/Darwin-Clang-CXX)
+include(Platform/Apple-Clang-CXX)
 if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.2)
   set(CMAKE_CXX_SYSTEM_FRAMEWORK_SEARCH_FLAG "-iframework ")
 else()
diff --git a/Modules/Platform/Apple-Clang-C.cmake b/Modules/Platform/Apple-Clang-C.cmake
new file mode 100644
index 0000000..4d0dc82
--- /dev/null
+++ b/Modules/Platform/Apple-Clang-C.cmake
@@ -0,0 +1,2 @@
+include(Platform/Apple-Clang)
+__apple_compiler_clang(C)
diff --git a/Modules/Platform/Apple-Clang-CXX.cmake b/Modules/Platform/Apple-Clang-CXX.cmake
new file mode 100644
index 0000000..6c1ddc1
--- /dev/null
+++ b/Modules/Platform/Apple-Clang-CXX.cmake
@@ -0,0 +1,2 @@
+include(Platform/Apple-Clang)
+__apple_compiler_clang(CXX)
diff --git a/Modules/Platform/Darwin-Clang.cmake b/Modules/Platform/Apple-Clang.cmake
index f8a07ec..70fc75e 100644
--- a/Modules/Platform/Darwin-Clang.cmake
+++ b/Modules/Platform/Apple-Clang.cmake
@@ -3,12 +3,12 @@
 
 
 # This module is shared by multiple languages; use include blocker.
-if(__DARWIN_COMPILER_CLANG)
+if(__APPLE_COMPILER_CLANG)
   return()
 endif()
-set(__DARWIN_COMPILER_CLANG 1)
+set(__APPLE_COMPILER_CLANG 1)
 
-macro(__darwin_compiler_clang lang)
+macro(__apple_compiler_clang lang)
   set(CMAKE_${lang}_VERBOSE_FLAG "-v -Wl,-v") # also tell linker to print verbose output
   set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-dynamiclib -Wl,-headerpad_max_install_names")
   set(CMAKE_SHARED_MODULE_CREATE_${lang}_FLAGS "-bundle -Wl,-headerpad_max_install_names")
diff --git a/Modules/Platform/Darwin-GNU-C.cmake b/Modules/Platform/Apple-GNU-C.cmake
index efdfd00..5481c99 100644
--- a/Modules/Platform/Darwin-GNU-C.cmake
+++ b/Modules/Platform/Apple-GNU-C.cmake
@@ -1,4 +1,4 @@
-include(Platform/Darwin-GNU)
-__darwin_compiler_gnu(C)
+include(Platform/Apple-GNU)
+__apple_compiler_gnu(C)
 cmake_gnu_set_sysroot_flag(C)
 cmake_gnu_set_osx_deployment_target_flag(C)
diff --git a/Modules/Platform/Darwin-GNU-CXX.cmake b/Modules/Platform/Apple-GNU-CXX.cmake
index e3c2ea7..727f726 100644
--- a/Modules/Platform/Darwin-GNU-CXX.cmake
+++ b/Modules/Platform/Apple-GNU-CXX.cmake
@@ -1,4 +1,4 @@
-include(Platform/Darwin-GNU)
-__darwin_compiler_gnu(CXX)
+include(Platform/Apple-GNU)
+__apple_compiler_gnu(CXX)
 cmake_gnu_set_sysroot_flag(CXX)
 cmake_gnu_set_osx_deployment_target_flag(CXX)
diff --git a/Modules/Platform/Darwin-GNU-Fortran.cmake b/Modules/Platform/Apple-GNU-Fortran.cmake
index 568d79b..2f53603 100644
--- a/Modules/Platform/Darwin-GNU-Fortran.cmake
+++ b/Modules/Platform/Apple-GNU-Fortran.cmake
@@ -1,8 +1,8 @@
 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
 # file Copyright.txt or https://cmake.org/licensing for details.
 
-include(Platform/Darwin-GNU)
-__darwin_compiler_gnu(Fortran)
+include(Platform/Apple-GNU)
+__apple_compiler_gnu(Fortran)
 cmake_gnu_set_sysroot_flag(Fortran)
 cmake_gnu_set_osx_deployment_target_flag(Fortran)
 
diff --git a/Modules/Platform/Darwin-GNU.cmake b/Modules/Platform/Apple-GNU.cmake
index 9f9ef01..9985ddd 100644
--- a/Modules/Platform/Darwin-GNU.cmake
+++ b/Modules/Platform/Apple-GNU.cmake
@@ -3,12 +3,12 @@
 
 
 # This module is shared by multiple languages; use include blocker.
-if(__DARWIN_COMPILER_GNU)
+if(__APPLE_COMPILER_GNU)
   return()
 endif()
-set(__DARWIN_COMPILER_GNU 1)
+set(__APPLE_COMPILER_GNU 1)
 
-macro(__darwin_compiler_gnu lang)
+macro(__apple_compiler_gnu lang)
   set(CMAKE_${lang}_VERBOSE_FLAG "-v -Wl,-v") # also tell linker to print verbose output
   # GNU does not have -shared on OS X
   set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-dynamiclib -Wl,-headerpad_max_install_names")
diff --git a/Modules/Platform/Apple-Intel-C.cmake b/Modules/Platform/Apple-Intel-C.cmake
new file mode 100644
index 0000000..95bb270
--- /dev/null
+++ b/Modules/Platform/Apple-Intel-C.cmake
@@ -0,0 +1,2 @@
+include(Platform/Apple-Intel)
+__apple_compiler_intel(C)
diff --git a/Modules/Platform/Apple-Intel-CXX.cmake b/Modules/Platform/Apple-Intel-CXX.cmake
new file mode 100644
index 0000000..b87e512
--- /dev/null
+++ b/Modules/Platform/Apple-Intel-CXX.cmake
@@ -0,0 +1,2 @@
+include(Platform/Apple-Intel)
+__apple_compiler_intel(CXX)
diff --git a/Modules/Platform/Darwin-Intel-Fortran.cmake b/Modules/Platform/Apple-Intel-Fortran.cmake
index 2299da9..e54e237 100644
--- a/Modules/Platform/Darwin-Intel-Fortran.cmake
+++ b/Modules/Platform/Apple-Intel-Fortran.cmake
@@ -1,8 +1,8 @@
 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
 # file Copyright.txt or https://cmake.org/licensing for details.
 
-include(Platform/Darwin-Intel)
-__darwin_compiler_intel(Fortran)
+include(Platform/Apple-Intel)
+__apple_compiler_intel(Fortran)
 
 set(CMAKE_Fortran_OSX_COMPATIBILITY_VERSION_FLAG "-compatibility_version ")
 set(CMAKE_Fortran_OSX_CURRENT_VERSION_FLAG "-current_version ")
diff --git a/Modules/Platform/Darwin-Intel.cmake b/Modules/Platform/Apple-Intel.cmake
index dd33cec..9f92d95 100644
--- a/Modules/Platform/Darwin-Intel.cmake
+++ b/Modules/Platform/Apple-Intel.cmake
@@ -3,12 +3,12 @@
 
 
 # This module is shared by multiple languages; use include blocker.
-if(__DARWIN_COMPILER_INTEL)
+if(__APPLE_COMPILER_INTEL)
   return()
 endif()
-set(__DARWIN_COMPILER_INTEL 1)
+set(__APPLE_COMPILER_INTEL 1)
 
-macro(__darwin_compiler_intel lang)
+macro(__apple_compiler_intel lang)
   set(CMAKE_${lang}_VERBOSE_FLAG "-v -Wl,-v") # also tell linker to print verbose output
   set(CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS "-dynamiclib -Wl,-headerpad_max_install_names")
   set(CMAKE_SHARED_MODULE_CREATE_${lang}_FLAGS "-bundle -Wl,-headerpad_max_install_names")
diff --git a/Modules/Platform/Darwin-NAG-Fortran.cmake b/Modules/Platform/Apple-NAG-Fortran.cmake
index 8d3e741..8d3e741 100644
--- a/Modules/Platform/Darwin-NAG-Fortran.cmake
+++ b/Modules/Platform/Apple-NAG-Fortran.cmake
diff --git a/Modules/Platform/Darwin-NVIDIA-CUDA.cmake b/Modules/Platform/Apple-NVIDIA-CUDA.cmake
index bec3948..bec3948 100644
--- a/Modules/Platform/Darwin-NVIDIA-CUDA.cmake
+++ b/Modules/Platform/Apple-NVIDIA-CUDA.cmake
diff --git a/Modules/Platform/Apple-PGI-C.cmake b/Modules/Platform/Apple-PGI-C.cmake
new file mode 100644
index 0000000..1e11724
--- /dev/null
+++ b/Modules/Platform/Apple-PGI-C.cmake
@@ -0,0 +1,2 @@
+include(Platform/Apple-PGI)
+__apple_compiler_pgi(C)
diff --git a/Modules/Platform/Apple-PGI-CXX.cmake b/Modules/Platform/Apple-PGI-CXX.cmake
new file mode 100644
index 0000000..aa5daf7
--- /dev/null
+++ b/Modules/Platform/Apple-PGI-CXX.cmake
@@ -0,0 +1,2 @@
+include(Platform/Apple-PGI)
+__apple_compiler_pgi(CXX)
diff --git a/Modules/Platform/Apple-PGI-Fortran.cmake b/Modules/Platform/Apple-PGI-Fortran.cmake
new file mode 100644
index 0000000..1e3e4b1
--- /dev/null
+++ b/Modules/Platform/Apple-PGI-Fortran.cmake
@@ -0,0 +1,2 @@
+include(Platform/Apple-PGI)
+__apple_compiler_pgi(Fortran)
diff --git a/Modules/Platform/Darwin-PGI.cmake b/Modules/Platform/Apple-PGI.cmake
index 04479a8..a68c08d 100644
--- a/Modules/Platform/Darwin-PGI.cmake
+++ b/Modules/Platform/Apple-PGI.cmake
@@ -2,12 +2,12 @@
 # file Copyright.txt or https://cmake.org/licensing for details.
 
 # This module is shared by multiple languages; use include blocker.
-if(__DARWIN_COMPILER_PGI)
+if(__APPLE_COMPILER_PGI)
   return()
 endif()
-set(__DARWIN_COMPILER_PGI 1)
+set(__APPLE_COMPILER_PGI 1)
 
-macro(__darwin_compiler_pgi lang)
+macro(__apple_compiler_pgi lang)
   set(CMAKE_${lang}_OSX_COMPATIBILITY_VERSION_FLAG "-Wl,-compatibility_version,")
   set(CMAKE_${lang}_OSX_CURRENT_VERSION_FLAG "-Wl,-current_version,")
   set(CMAKE_SHARED_LIBRARY_SONAME_${lang}_FLAG "-Wl,-install_name")
diff --git a/Modules/Platform/Apple-VisualAge-C.cmake b/Modules/Platform/Apple-VisualAge-C.cmake
new file mode 100644
index 0000000..7fa6032
--- /dev/null
+++ b/Modules/Platform/Apple-VisualAge-C.cmake
@@ -0,0 +1 @@
+include(Platform/Apple-XL-C)
diff --git a/Modules/Platform/Apple-VisualAge-CXX.cmake b/Modules/Platform/Apple-VisualAge-CXX.cmake
new file mode 100644
index 0000000..12dd347
--- /dev/null
+++ b/Modules/Platform/Apple-VisualAge-CXX.cmake
@@ -0,0 +1 @@
+include(Platform/Apple-XL-CXX)
diff --git a/Modules/Platform/Darwin-XL-C.cmake b/Modules/Platform/Apple-XL-C.cmake
index 2aeb132..2aeb132 100644
--- a/Modules/Platform/Darwin-XL-C.cmake
+++ b/Modules/Platform/Apple-XL-C.cmake
diff --git a/Modules/Platform/Darwin-XL-CXX.cmake b/Modules/Platform/Apple-XL-CXX.cmake
index f8e1906..f8e1906 100644
--- a/Modules/Platform/Darwin-XL-CXX.cmake
+++ b/Modules/Platform/Apple-XL-CXX.cmake
diff --git a/Modules/Platform/Darwin-Clang-C.cmake b/Modules/Platform/Darwin-Clang-C.cmake
deleted file mode 100644
index 0a1502e..0000000
--- a/Modules/Platform/Darwin-Clang-C.cmake
+++ /dev/null
@@ -1,2 +0,0 @@
-include(Platform/Darwin-Clang)
-__darwin_compiler_clang(C)
diff --git a/Modules/Platform/Darwin-Clang-CXX.cmake b/Modules/Platform/Darwin-Clang-CXX.cmake
deleted file mode 100644
index f8e8d88..0000000
--- a/Modules/Platform/Darwin-Clang-CXX.cmake
+++ /dev/null
@@ -1,2 +0,0 @@
-include(Platform/Darwin-Clang)
-__darwin_compiler_clang(CXX)
diff --git a/Modules/Platform/Darwin-Initialize.cmake b/Modules/Platform/Darwin-Initialize.cmake
index b539e45..3db77aa 100644
--- a/Modules/Platform/Darwin-Initialize.cmake
+++ b/Modules/Platform/Darwin-Initialize.cmake
@@ -20,6 +20,10 @@ execute_process(COMMAND sw_vers -productVersion
 set(CMAKE_OSX_ARCHITECTURES "$ENV{CMAKE_OSX_ARCHITECTURES}" CACHE STRING
   "Build architectures for OSX")
 
+# macOS, iOS, tvOS, and watchOS should lookup compilers from
+# Platform/Apple-${CMAKE_CXX_COMPILER_ID}-<LANG>
+set(CMAKE_EFFECTIVE_SYSTEM_NAME "Apple")
+
 #----------------------------------------------------------------------------
 # _CURRENT_OSX_VERSION - as a two-component string: 10.5, 10.6, ...
 #
diff --git a/Modules/Platform/Darwin-Intel-C.cmake b/Modules/Platform/Darwin-Intel-C.cmake
deleted file mode 100644
index 81c630f..0000000
--- a/Modules/Platform/Darwin-Intel-C.cmake
+++ /dev/null
@@ -1,2 +0,0 @@
-include(Platform/Darwin-Intel)
-__darwin_compiler_intel(C)
diff --git a/Modules/Platform/Darwin-Intel-CXX.cmake b/Modules/Platform/Darwin-Intel-CXX.cmake
deleted file mode 100644
index 90ae53b..0000000
--- a/Modules/Platform/Darwin-Intel-CXX.cmake
+++ /dev/null
@@ -1,2 +0,0 @@
-include(Platform/Darwin-Intel)
-__darwin_compiler_intel(CXX)
diff --git a/Modules/Platform/Darwin-PGI-C.cmake b/Modules/Platform/Darwin-PGI-C.cmake
deleted file mode 100644
index 790919b..0000000
--- a/Modules/Platform/Darwin-PGI-C.cmake
+++ /dev/null
@@ -1,2 +0,0 @@
-include(Platform/Darwin-PGI)
-__darwin_compiler_pgi(C)
diff --git a/Modules/Platform/Darwin-PGI-CXX.cmake b/Modules/Platform/Darwin-PGI-CXX.cmake
deleted file mode 100644
index ceaed71..0000000
--- a/Modules/Platform/Darwin-PGI-CXX.cmake
+++ /dev/null
@@ -1,2 +0,0 @@
-include(Platform/Darwin-PGI)
-__darwin_compiler_pgi(CXX)
diff --git a/Modules/Platform/Darwin-PGI-Fortran.cmake b/Modules/Platform/Darwin-PGI-Fortran.cmake
deleted file mode 100644
index 146807b..0000000
--- a/Modules/Platform/Darwin-PGI-Fortran.cmake
+++ /dev/null
@@ -1,2 +0,0 @@
-include(Platform/Darwin-PGI)
-__darwin_compiler_pgi(Fortran)
diff --git a/Modules/Platform/Darwin-VisualAge-C.cmake b/Modules/Platform/Darwin-VisualAge-C.cmake
deleted file mode 100644
index 859914f..0000000
--- a/Modules/Platform/Darwin-VisualAge-C.cmake
+++ /dev/null
@@ -1 +0,0 @@
-include(Platform/Darwin-XL-C)
diff --git a/Modules/Platform/Darwin-VisualAge-CXX.cmake b/Modules/Platform/Darwin-VisualAge-CXX.cmake
deleted file mode 100644
index 46c1005..0000000
--- a/Modules/Platform/Darwin-VisualAge-CXX.cmake
+++ /dev/null
@@ -1 +0,0 @@
-include(Platform/Darwin-XL-CXX)