Big cmake changes (#1514)

* Delete emscripten.cmake

This file is not needed at this point. EMSDK provides a toolchain file that has a lot more things in it and is better supported. Project currently works fine with the documentation provided in Emscripten SDK on how to build projects.

* First pass file separation.

The main two files are cleaner now. Only important things can be seen. Major changes include:
- raylib_static is now the alias instead of raylib
- Repeating segments are removed and pulled into separate files into <root>/cmake
- File is reordered to make more sense
- Installs are better structured
- Library is build into an output directory "raylib" instead of "src"
- All public header files are now set as a public header file
- Source files need to be listed (it is a bad practice to capture them using wildcards and file globs)
- CMakeLists are better commented

* Second pass on the example dirs.

They are quite complex so I'm more hesitant to do major changes. Also it works pretty well. Noticed that I forgot one of the seperated files and added it into src/CMakeLists.txt.

* Returned the header copy as it was convenient to have the public headers copied.

* A better description to the variable RAYLIB_IS_MAIN

Co-authored-by: Rob Loach <[email protected]>

* Remove debug message

Co-authored-by: Rob Loach <[email protected]>

* Improvements based on review.

* Simplify the install condition to not be platform specific as it was before.

Co-authored-by: Alexander Neumann <[email protected]>

* Remove some CMAKE variables as they don't affect the build in any way

Co-authored-by: Alexander Neumann <[email protected]>

Co-authored-by: Rob Loach <[email protected]>
Co-authored-by: Alexander Neumann <[email protected]>

1 files changed, 39 insertions, 0 deletions

diff --git a/cmake/BuildOptions.cmake b/cmake/BuildOptions.cmake
new file mode 100644
index 00000000..00586c23
--- /dev/null
+++ b/cmake/BuildOptions.cmake
@@ -0,0 +1,39 @@
+if(NOT (STATIC OR SHARED))
+  message(FATAL_ERROR "Nothing to do if both -DSHARED=OFF and -DSTATIC=OFF...")
+endif()
+
+if (DEFINED BUILD_SHARED_LIBS)
+  set(SHARED ${BUILD_SHARED_LIBS})
+  if (${BUILD_SHARED_LIBS})
+    set(STATIC OFF)
+  else()
+    set(STATIC ON)
+  endif()
+endif()
+if(DEFINED SHARED_RAYLIB)
+  set(SHARED ${SHARED_RAYLIB})
+  message(DEPRECATION "-DSHARED_RAYLIB is deprecated. Please use -DSHARED instead.")
+endif()
+if(DEFINED STATIC_RAYLIB)
+  set(STATIC ${STATIC_RAYLIB})
+  message(DEPRECATION "-DSTATIC_RAYLIB is deprecated. Please use -DSTATIC instead.")
+endif()
+
+if(${PLATFORM} MATCHES "Desktop" AND APPLE)
+  if(MACOS_FATLIB)
+      if (CMAKE_OSX_ARCHITECTURES)
+          message(FATAL_ERROR "User supplied -DCMAKE_OSX_ARCHITECTURES overrides -DMACOS_FATLIB=ON")
+      else()
+          set(CMAKE_OSX_ARCHITECTURES "x86_64;i386")
+      endif()
+  endif()
+endif()
+
+# This helps support the case where emsdk toolchain file is used
+# either by setting it with -DCMAKE_TOOLCHAIN_FILE=<path_to_emsdk>/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake
+# or by using "emcmake cmake -B build -S ." as described in https://emscripten.org/docs/compiling/Building-Projects.html
+if(EMSCRIPTEN)
+    SET(PLATFORM Web CACHE STRING "Forcing PLATFORM_WEB because EMSCRIPTEN was detected")
+endif()
+
+# vim: ft=cmake