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, 29 insertions, 0 deletions

diff --git a/cmake/InstallConfigurations.cmake b/cmake/InstallConfigurations.cmake
new file mode 100644
index 00000000..a26fedf5
--- /dev/null
+++ b/cmake/InstallConfigurations.cmake
@@ -0,0 +1,29 @@
+install(
+        TARGETS raylib EXPORT raylib-targets
+        ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+        LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+        RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
+        PUBLIC_HEADER DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+)
+
+# PKG_CONFIG_LIBS_PRIVATE is used in raylib.pc.in
+if (STATIC)
+    include(LibraryPathToLinkerFlags)
+    library_path_to_linker_flags(__PKG_CONFIG_LIBS_PRIVATE "${LIBS_PRIVATE}")
+    set(PKG_CONFIG_LIBS_PRIVATE ${__PKG_CONFIG_LIBS_PRIVATE} ${GLFW_PKG_LIBS})
+    string(REPLACE ";" " " PKG_CONFIG_LIBS_PRIVATE "${PKG_CONFIG_LIBS_PRIVATE}")
+elseif (SHARED)
+    set(PKG_CONFIG_LIBS_EXTRA "")
+endif ()
+
+join_paths(libdir_for_pc_file "\${exec_prefix}" "${CMAKE_INSTALL_LIBDIR}")
+join_paths(includedir_for_pc_file "\${prefix}" "${CMAKE_INSTALL_INCLUDEDIR}")
+configure_file(../raylib.pc.in raylib.pc @ONLY)
+configure_file(../cmake/raylib-config-version.cmake raylib-config-version.cmake @ONLY)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/raylib.pc DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/raylib-config-version.cmake DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/raylib")
+install(FILES ${PROJECT_SOURCE_DIR}/../cmake/raylib-config.cmake DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/raylib")
+
+# populates raylib_{FOUND, INCLUDE_DIRS, LIBRARIES, LDFLAGS, DEFINITIONS}
+include(PopulateConfigVariablesLocally)
+populate_config_variables_locally(raylib)