Merge PR ceph#54272 into main

* refs/pull/54272/head:
	cmake: do not issue CMAKE_BUILD_TYPE warning if set

Reviewed-by: Ilya Dryomov <[email protected]>
Reviewed-by: Casey Bodley <[email protected]>

Author: batrick

CMakeLists.txt

@@ -23,13 +23,15 @@ endforeach()
 
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules/")
 
-if(NOT CMAKE_BUILD_TYPE AND EXISTS "${CMAKE_SOURCE_DIR}/.git")
-  message(WARNING "CMAKE_BUILD_TYPE not specified, assuming CMAKE_BUILD_TYPE=Debug because .git exists.")
-  set(default_build_type "Debug")
-  set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE
-      STRING "Default BUILD_TYPE is Debug, other options are: RelWithDebInfo, Release, and MinSizeRel." FORCE)
-else()
-  message(WARNING "CMAKE_BUILD_TYPE not specified, leaving unset because .git does NOT exist.")
+if(NOT CMAKE_BUILD_TYPE)
+  if (EXISTS "${CMAKE_SOURCE_DIR}/.git")
+    message(WARNING "CMAKE_BUILD_TYPE not specified, assuming CMAKE_BUILD_TYPE=Debug because .git exists.")
+    set(default_build_type "Debug")
+    set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE
+        STRING "Default BUILD_TYPE is Debug, other options are: RelWithDebInfo, Release, and MinSizeRel." FORCE)
+  else()
+    message(WARNING "CMAKE_BUILD_TYPE not specified, leaving unset because .git does NOT exist.")
+  endif()
 endif()
 
 if(CMAKE_SYSTEM_NAME MATCHES "Linux")