CMake: Organize files

1. Platform and toolchain files are now all under `platforms/`, with a
   single `CMake/platforms/${platform}.cmake` per platform.

2. Custom functions/macros are under `functions/`.

3. Finder modules are in `/finders`.

.github/workflows/Linux_x86.yml

@@ -26,13 +26,13 @@ jobs:
       uses: actions/cache@v2
       with:
         path: build
-        key: linux-x86-cmake-${{ github.sha }}
-        restore-keys: linux-x86-cmake-
+        key: linux-x86-cmake-v2-${{ github.sha }}
+        restore-keys: linux-x86-cmake-v2-
 
     - name: Configure CMake
       shell: bash
       working-directory: ${{github.workspace}}
-      run: cmake -S. -Bbuild -DNIGHTLY_BUILD=ON -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_TOOLCHAIN_FILE=../CMake/32bit.cmake
+      run: cmake -S. -Bbuild -DNIGHTLY_BUILD=ON -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_TOOLCHAIN_FILE=../CMake/platforms/linux_i386.toolchain.cmake
 
     - name: Build
       working-directory: ${{github.workspace}}

.github/workflows/Windows_x64.yml

@@ -26,13 +26,13 @@ jobs:
       uses: actions/cache@v2
       with:
         path: build
-        key: windows-x86_64-cmake-${{ github.sha }}
-        restore-keys: windows-x86_64-cmake-
+        key: windows-x86_64-cmake-v2-${{ github.sha }}
+        restore-keys: windows-x86_64-cmake-v2-
 
     - name: Configure CMake
       shell: bash
       working-directory: ${{github.workspace}}
-      run: cmake -S. -Bbuild -DNIGHTLY_BUILD=ON -DCMAKE_TOOLCHAIN_FILE=../CMake/mingwcc64.cmake -DDEVILUTIONX_SYSTEM_BZIP2=OFF
+      run: cmake -S. -Bbuild -DNIGHTLY_BUILD=ON -DCMAKE_TOOLCHAIN_FILE=../CMake/platforms/mingwcc64.toolchain.cmake -DDEVILUTIONX_SYSTEM_BZIP2=OFF
 
     - name: Build
       working-directory: ${{github.workspace}}

.github/workflows/Windows_x86.yml

@@ -26,13 +26,13 @@ jobs:
       uses: actions/cache@v2
       with:
         path: build
-        key: windows-x86-cmake-${{ github.sha }}
-        restore-keys: windows-x86-cmake-
+        key: windows-x86-cmake-v2-${{ github.sha }}
+        restore-keys: windows-x86-cmake-v2-
 
     - name: Configure CMake
       shell: bash
       working-directory: ${{github.workspace}}
-      run: cmake -S. -Bbuild -DNIGHTLY_BUILD=ON -DCMAKE_TOOLCHAIN_FILE=../CMake/mingwcc.cmake -DDEVILUTIONX_SYSTEM_BZIP2=OFF
+      run: cmake -S. -Bbuild -DNIGHTLY_BUILD=ON -DCMAKE_TOOLCHAIN_FILE=../CMake/platforms/mingwcc.toolchain.cmake -DDEVILUTIONX_SYSTEM_BZIP2=OFF
 
     - name: Build
       working-directory: ${{github.workspace}}

.github/workflows/iOS.yml

@@ -24,15 +24,15 @@ jobs:
       uses: actions/cache@v2
       with:
         path: build
-        key: ios-cmake-${{ github.sha }}
-        restore-keys: ios-cmake-
+        key: ios-cmake-v2-${{ github.sha }}
+        restore-keys: ios-cmake-v2-
 
     - name: Configure CMake
       # Use a bash shell so we can use the same syntax for environment variable
       # access regardless of the host operating system
       shell: bash
       working-directory: ${{github.workspace}}
-      run: cmake -S. -Bbuild -DCMAKE_TOOLCHAIN_FILE=../CMake/ios.toolchain.cmake  -DENABLE_BITCODE=0 -DPLATFORM=OS64
+      run: cmake -S. -Bbuild -DCMAKE_TOOLCHAIN_FILE=../CMake/platforms/ios.toolchain.cmake  -DENABLE_BITCODE=0 -DPLATFORM=OS64
 
     - name: Build
       working-directory: ${{github.workspace}}

3rdParty/SDL2/CMakeLists.txt

@@ -11,7 +11,7 @@ else()
   set(SDL_STATIC OFF)
 endif()
 
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 include(FetchContent)
 FetchContent_Declare(SDL2
     URL https://github.com/libsdl-org/SDL/archive/5056b29b0f8611b470d8b8bdb313eab628f8bd6e.tar.gz

3rdParty/SDL_audiolib/CMakeLists.txt

@@ -1,4 +1,4 @@
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
 if(DEVILUTIONX_STATIC_SDL_AUDIOLIB)
   set(BUILD_SHARED_LIBS OFF)

3rdParty/SDL_image/CMakeLists.txt

@@ -1,4 +1,4 @@
-include(dependency_options)
+include(functions/dependency_options)
 
 if(NOT DEFINED DEVILUTIONX_SYSTEM_LIBPNG)
   find_package(PNG QUIET)
@@ -26,7 +26,7 @@ else()
   add_subdirectory(../libpng libpng)
 endif()
 
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 include(FetchContent)
 if(USE_SDL1)
   FetchContent_Declare(SDL_image

3rdParty/asio/CMakeLists.txt

@@ -1,4 +1,4 @@
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
 include(FetchContent)
 FetchContent_Declare(asio

3rdParty/bzip2/CMakeLists.txt

@@ -1,4 +1,4 @@
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
 include(FetchContent)
 FetchContent_Declare(bzip2

3rdParty/find_steam_game/CMakeLists.txt

@@ -1,4 +1,4 @@
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
 include(FetchContent)
 FetchContent_Declare(find_steam_game

3rdParty/libfmt/CMakeLists.txt

@@ -1,4 +1,4 @@
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
 if(NOT WIN32 AND NOT APPLE AND NOT ${CMAKE_SYSTEM_NAME} STREQUAL FreeBSD)
   # Enable POSIX extensions such as `readlink` and `ftruncate`.

3rdParty/libmpq/CMakeLists.txt

@@ -4,7 +4,7 @@ if(NOT TARGET BZip2::BZip2)
   find_package(BZip2 REQUIRED)
 endif()
 
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
 include(FetchContent)
 FetchContent_Declare(libmpq

3rdParty/libpng/CMakeLists.txt

@@ -1,4 +1,4 @@
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
 if(NOT DISABLE_LTO)
   # Force CMake to raise an error if INTERPROCEDURAL_OPTIMIZATION

3rdParty/libsmackerdec/CMakeLists.txt

@@ -1,4 +1,4 @@
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
 include(FetchContent)
 FetchContent_Declare(libsmackerdec

3rdParty/libsodium/CMakeLists.txt

@@ -1,5 +1,5 @@
 if(NOT DEVILUTIONX_SYSTEM_LIBSODIUM)
-  include(FetchContent_MakeAvailableExcludeFromAll)
+  include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
   set(SODIUM_MINIMAL ON)
   set(SODIUM_ENABLE_BLOCKING_RANDOM OFF)

3rdParty/libzt/CMakeLists.txt

@@ -1,4 +1,4 @@
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
 include(FetchContent)
 FetchContent_Declare(libzt

3rdParty/simpleini/CMakeLists.txt

@@ -1,4 +1,4 @@
-include(FetchContent_MakeAvailableExcludeFromAll)
+include(functions/FetchContent_MakeAvailableExcludeFromAll)
 
 include(FetchContent)
 FetchContent_Declare(simpleini

CMake/Dependencies.cmake

@@ -1,6 +1,6 @@
 # Options that control whether to use system dependencies or build them from source,
 # and whether to link them statically.
-include(dependency_options)
+include(functions/dependency_options)
 
 if(USE_SDL1)
   find_package(SDL REQUIRED)

CMake/Platforms.cmake

@@ -1,28 +1,15 @@
-if(NINTENDO_SWITCH)
-  list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/switch")
-  include(switch_defs)
-endif()
-
-if(VITA)
-  include("$ENV{VITASDK}/share/vita.cmake" REQUIRED)
-  include(vita_defs)
+if(WIN32)
+  set(ASAN OFF)
+  set(UBSAN OFF)
+  set(DIST ON)
 endif()
 
-set(TARGET_PLATFORM host CACHE STRING "Target platform")
-set_property(CACHE TARGET_PLATFORM PROPERTY STRINGS host retrofw rg350 gkd350h cpigamesh)
-if(TARGET_PLATFORM STREQUAL "lepus")
-  include(lepus_defs)
-elseif(TARGET_PLATFORM STREQUAL "retrofw")
-  include(retrofw_defs)
-elseif(TARGET_PLATFORM STREQUAL "rg350")
-  include(rg350_defs)
-elseif(TARGET_PLATFORM STREQUAL "gkd350h")
-  include(gkd350h_defs)
-elseif(TARGET_PLATFORM STREQUAL "cpigamesh")
-  include(cpigamesh_defs)
+if(HAIKU)
+  set(ASAN OFF)
+  set(UBSAN OFF)
 endif()
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD|NetBSD|OpenBSD|DragonFly")
+if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD|OpenBSD|DragonFly|NetBSD")
   if(${CMAKE_SYSTEM_NAME} MATCHES "NetBSD")
     add_definitions(-D_NETBSD_SOURCE)
   else()
@@ -33,30 +20,41 @@ if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD|NetBSD|OpenBSD|DragonFly")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DO_LARGEFILE=0 -Dstat64=stat -Dlstat64=lstat -Dlseek64=lseek -Doff64_t=off_t -Dfstat64=fstat -Dftruncate64=ftruncate")
 endif()
 
-if(WIN32)
-  set(ASAN OFF)
-  set(UBSAN OFF)
-  set(DIST ON)
+set(TARGET_PLATFORM host CACHE STRING "Target platform")
+set_property(CACHE TARGET_PLATFORM PROPERTY STRINGS host retrofw rg350 gkd350h cpigamesh)
+if(TARGET_PLATFORM STREQUAL "retrofw")
+  include(platforms/retrofw)
+elseif(TARGET_PLATFORM STREQUAL "rg350")
+  include(platforms/rg350)
+elseif(TARGET_PLATFORM STREQUAL "gkd350h")
+  include(platforms/gkd350h)
+elseif(TARGET_PLATFORM STREQUAL "cpigamesh")
+  include(platforms/cpigamesh)
+elseif(TARGET_PLATFORM STREQUAL "lepus")
+  include(platforms/lepus)
 endif()
 
-if(HAIKU)
-  set(ASAN OFF)
-  set(UBSAN OFF)
+if(NINTENDO_SWITCH)
+  include(platforms/switch)
 endif()
 
 if(AMIGA)
-  include(amiga_defs)
+  include(platforms/amiga)
 endif()
 
 if(NINTENDO_3DS)
-  list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMake/ctr")
-  include(n3ds_defs)
+  include(platforms/n3ds)
+endif()
+
+if(VITA)
+  include("$ENV{VITASDK}/share/vita.cmake" REQUIRED)
+  include(platforms/vita)
 endif()
 
 if(ANDROID)
-  include(android_defs)
+  include(platforms/android)
 endif()
 
 if(IOS)
-  include(ios_defs)
+  include(platforms/ios)
 endif()

CMake/out_of_tree.cmake

@@ -1,3 +0,0 @@
-if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
-    message(WARNING [[In-source build detected, please eg. create a new directory and use `cmake ..`]])
-endif()

CMake/platforms/n3ds.cmake

@@ -11,7 +11,8 @@ set(USE_SDL1 ON)
 set(PREFILL_PLAYER_NAME ON)
 
 #3DS libraries
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMake/ctr/modules")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/ctr")
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/ctr/modules")
 find_package(CITRO3D REQUIRED)
 
 #additional compilation definitions

CMake/platforms/switch.cmake

@@ -1,3 +1,5 @@
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/switch")
+
 set(ASAN OFF)
 set(UBSAN OFF)
 

CMake/switch/asio_defs.cmake

@@ -1,5 +0,0 @@
-# Enables a number of header file definitions required by ASIO
-target_compile_definitions(asio INTERFACE _DEFAULT_SOURCE=ON)
-
-# Missing headers and declarations provided by DevilutionX
-target_include_directories(asio BEFORE INTERFACE ${CMAKE_CURRENT_LIST_DIR}/asio/include)

CMakeLists.txt

@@ -22,11 +22,15 @@ if(IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/dist")
   add_subdirectory(dist)
 endif()
 
+if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
+  message(WARNING [[In-source build detected, please eg. create a new directory and use `cmake ..`]])
+endif()
+
 include(CMakeDependentOption)
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMake")
-include(out_of_tree)
-include(genex)
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMake/finders")
+include(functions/genex)
 
 DEBUG_OPTION(ASAN "Enable address sanitizer")
 DEBUG_OPTION(UBSAN "Enable undefined behaviour sanitizer")
@@ -92,7 +96,7 @@ include(VcPkgManifestFeatures)
 
 # Set up the `project` early so that properties such as `TARGET_SUPPORTS_SHARED_LIBS` are defined.
 if(NOT VERSION_NUM)
-  include(CMake/git.cmake)
+  include(functions/git)
   get_git_tag(VERSION_NUM)
   if (NOT "${VERSION_NUM}" STREQUAL "")
     string(REGEX MATCH "([0-9]+\\.[0-9]+\\.[0-9]+)" VERSION_NUM ${VERSION_NUM} )

docs/building.md

@@ -132,14 +132,14 @@ sudo apt-get install cmake gcc-mingw-w64-x86-64 g++-mingw-w64-x86-64 pkg-config-
 ### 32-bit
 
 ```bash
-cmake -S. -Bbuild -DCMAKE_TOOLCHAIN_FILE=../CMake/mingwcc.cmake -DCMAKE_BUILD_TYPE=Release
+cmake -S. -Bbuild -DCMAKE_TOOLCHAIN_FILE=../CMake/platforms/mingwcc.toolchain.cmake -DCMAKE_BUILD_TYPE=Release
 cmake --build build -j $(getconf _NPROCESSORS_ONLN)
 ```
 
 ### 64-bit
 
 ```bash
-cmake -S. -Bbuild -DCMAKE_TOOLCHAIN_FILE=../CMake/mingwcc64.cmake -DCMAKE_BUILD_TYPE=Release
+cmake -S. -Bbuild -DCMAKE_TOOLCHAIN_FILE=../CMake/mingwcc64.toolchain.cmake -DCMAKE_BUILD_TYPE=Release
 cmake --build build -j $(getconf _NPROCESSORS_ONLN)
 ```
 
@@ -369,7 +369,7 @@ select Icons -> Information in the top menu.
 - `-DCMAKE_BUILD_TYPE=Release` changed build type to release and optimize for distribution.
 - `-DNONET=ON` disable network support, this also removes the need for the ASIO and Sodium.
 - `-DUSE_SDL1=ON` build for SDL v1 instead of v2, not all features are supported under SDL v1, notably upscaling.
-- `-DCMAKE_TOOLCHAIN_FILE=../CMake/32bit.cmake` generate 32bit builds on 64bit platforms (remember to use the `linux32` command if on Linux).
+- `-DCMAKE_TOOLCHAIN_FILE=../CMake/platforms/linux_i386.toolchain..cmake` generate 32bit builds on 64bit platforms (remember to use the `linux32` command if on Linux).
 
 ### Debug builds
 - `-DDEBUG=OFF` disable debug mode of the Diablo engine.