Specify default opt/debug options for different CMAKE_BUILD_TYPEs

[greenc-FNAL]

• May be overridden from CMake command line, environment, etc.

[greenc-FNAL]

@phlexbot cmake-fix

[github-actions]

Automatic cmake-format fixes pushed (commit ff40cdd).
⚠️ Note: Some issues may require manual review and fixing.

[Copilot]

Pull request overview

Adds explicit default C++ compiler flags for common CMake build types at the top level, aiming to standardize optimization/debug settings across builds.

Changes:

• Introduce cached defaults for CMAKE_CXX_FLAGS_DEBUG, CMAKE_CXX_FLAGS_RELEASE, and CMAKE_CXX_FLAGS_RELWITHDEBINFO.

[Copilot]

These set(CMAKE_CXX_FLAGS_<CONFIG> ... CACHE ... FORCE) calls run before project()/cet_cmake_env(), so the variables are typically still unset and will be force-initialized here. That overrides the toolchain/compiler defaults CMake (and cetmodules) would normally populate, and can break or unexpectedly change flags for non-GNU/Clang toolchains. Prefer setting CMAKE_CXX_FLAGS_<CONFIG>_INIT before project(), or move this after project() and append per-config flags via add_compile_options($<$<CONFIG:...>:...>)/target options, and avoid FORCE unless you intend to override user-provided cache values.

Suggested change

	if(NOT CMAKE_CXX_FLAGS_DEBUG)
	set(CMAKE_CXX_FLAGS_DEBUG "-Og -g" CACHE STRING "" FORCE)
	endif()
	if(NOT CMAKE_CXX_FLAGS_RELEASE)
	set(CMAKE_CXX_FLAGS_RELEASE "-O3 -g0 -DNDEBUG" CACHE STRING "" FORCE)
	endif()
	if(NOT CMAKE_CXX_FLAGS_RELWITHDEBINFO)
	set(
	CMAKE_CXX_FLAGS_RELWITHDEBINFO
	"-O3 -fno-omit-frame-pointer -g -DNDEBUG"
	CACHE STRING
	""
	FORCE
	)
	if(NOT DEFINED CMAKE_CXX_FLAGS_DEBUG_INIT)
	set(CMAKE_CXX_FLAGS_DEBUG_INIT "-Og -g")
	endif()
	if(NOT DEFINED CMAKE_CXX_FLAGS_RELEASE_INIT)
	set(CMAKE_CXX_FLAGS_RELEASE_INIT "-O3 -g0 -DNDEBUG")
	endif()
	if(NOT DEFINED CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT)
	set(CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT "-O3 -fno-omit-frame-pointer -g -DNDEBUG")

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@            Coverage Diff             @@
##             main     #409      +/-   ##
==========================================
+ Coverage   83.71%   83.83%   +0.12%     
==========================================
  Files         126      126              
  Lines        3291     3291              
  Branches      583      583              
==========================================
+ Hits         2755     2759       +4     
+ Misses        325      324       -1     
+ Partials      211      208       -3     

Flag	Coverage Δ
unittests	83.83% <ø> (+0.12%)	⬆️

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see 4 files with indirect coverage changes

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