Remove unneccessary quotes in CMake conditions

CMakeLists.txt

@@ -18,7 +18,7 @@ endif()
 
 set_property(GLOBAL PROPERTY USE_FOLDERS ON)
 
-if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
+if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
     set(GLFW_STANDALONE TRUE)
 endif()
 
@@ -71,17 +71,17 @@ endif()
 # This is here because it also applies to tests and examples
 #--------------------------------------------------------------------
 if (MSVC AND NOT USE_MSVC_RUNTIME_LIBRARY_DLL)
-    if (${CMAKE_VERSION} VERSION_LESS 3.15)
+    if (CMAKE_VERSION VERSION_LESS 3.15)
         foreach (flag CMAKE_C_FLAGS
                       CMAKE_C_FLAGS_DEBUG
                       CMAKE_C_FLAGS_RELEASE
                       CMAKE_C_FLAGS_MINSIZEREL
                       CMAKE_C_FLAGS_RELWITHDEBINFO)
 
-            if (${flag} MATCHES "/MD")
+            if (flag MATCHES "/MD")
                 string(REGEX REPLACE "/MD" "/MT" ${flag} "${${flag}}")
             endif()
-            if (${flag} MATCHES "/MDd")
+            if (flag MATCHES "/MDd")
                 string(REGEX REPLACE "/MDd" "/MTd" ${flag} "${${flag}}")
             endif()
 
@@ -212,7 +212,7 @@ if (_GLFW_WAYLAND)
     check_include_files(xkbcommon/xkbcommon-compose.h HAVE_XKBCOMMON_COMPOSE_H)
     check_function_exists(memfd_create HAVE_MEMFD_CREATE)
 
-    if (NOT ("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux"))
+    if (NOT CMAKE_SYSTEM_NAME STREQUAL "Linux")
         find_package(EpollShim)
         if (EPOLLSHIM_FOUND)
             list(APPEND glfw_INCLUDE_DIRS "${EPOLLSHIM_INCLUDE_DIRS}")

src/CMakeLists.txt

@@ -121,7 +121,7 @@ target_include_directories(glfw PRIVATE
 target_link_libraries(glfw PRIVATE Threads::Threads ${glfw_LIBRARIES})
 
 # Workaround for CMake not knowing about .m files before version 3.16
-if ("${CMAKE_VERSION}" VERSION_LESS "3.16" AND APPLE)
+if (CMAKE_VERSION VERSION_LESS "3.16" AND APPLE)
     set_source_files_properties(cocoa_init.m cocoa_joystick.m cocoa_monitor.m
                                 cocoa_window.m nsgl_context.m PROPERTIES
                                 LANGUAGE C)