initial commit

cmake/os.cmake

@@ -0,0 +1,23 @@
+if(MSVC)
+  message(FATAL_ERROR "MSVC will not be supported")
+endif()
+
+if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
+  message(FATAL_ERROR "FreeBSD is not currently supported")
+endif()
+
+if(PROJECT_REQUIRE_ALPINE AND NOT PROJECT_IS_ALPINE AND PROJECT_IS_MINGW AND PROJECT_IS_MINGW_UNIX)
+  message(FATAL_ERROR "Project requires Alpine Linux to build")
+endif()
+
+if (PROJECT_IS_DARWIN)
+  if (PROJECT_IS_ARM64)
+    set(CMAKE_OSX_ARCHITECTURES "arm64")
+  else()
+    set(CMAKE_OSX_ARCHITECTURES "x86_64")
+  endif()
+endif()
+
+if (PROJECT_IS_DARWIN AND NOT PROJECT_MACOS_BUNDLE_ID)
+  message(FATAL_ERROR "'PROJECT_MACOS_BUNDLE_ID' is not set in 'config.sh'")
+endif()