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# cmake/CompilerWarnings.cmake
# Comprehensive compiler warnings for C++
function(set_project_warnings target_name)
set(MSVC_WARNINGS
/W4 # Baseline reasonable warnings
/w14242 # Conversion possible loss of data
/w14254 # Operator conversions
/w14263 # Member function does not override
/w14265 # Class has virtual functions but destructor is not virtual
/w14287 # Unsigned/negative constant mismatch
/we4289 # Loop variable used outside loop (error)
/w14296 # Expression is always true/false
/w14311 # Pointer truncation
/w14545 # Expression before comma evaluates to function
/w14546 # Function call before comma missing argument list
/w14547 # Operator before comma has no effect
/w14549 # Operator before comma has no effect
/w14555 # Expression has no effect
/w14619 # Unknown pragma warning
/w14640 # Thread-unsafe static member initialization
/w14826 # Conversion is sign-extended
/w14905 # Wide string literal cast
/w14906 # String literal cast
/w14928 # Illegal copy-initialization
/permissive- # Conformance mode
)
set(CLANG_WARNINGS
-Wall
-Wextra
-Wshadow
-Wnon-virtual-dtor
-Wold-style-cast
-Wcast-align
-Wunused
-Woverloaded-virtual
-Wpedantic
-Wconversion
-Wsign-conversion
-Wnull-dereference
-Wdouble-promotion
-Wformat=2
-Wimplicit-fallthrough
)
set(GCC_WARNINGS
${CLANG_WARNINGS}
-Wmisleading-indentation
-Wduplicated-cond
-Wduplicated-branches
-Wlogical-op
-Wuseless-cast
)
if(MSVC)
set(PROJECT_WARNINGS_CXX ${MSVC_WARNINGS})
elseif(CMAKE_CXX_COMPILER_ID MATCHES ".*Clang")
set(PROJECT_WARNINGS_CXX ${CLANG_WARNINGS})
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
set(PROJECT_WARNINGS_CXX ${GCC_WARNINGS})
else()
message(WARNING "No compiler warnings set for CXX compiler: ${CMAKE_CXX_COMPILER_ID}")
endif()
# C warnings (similar but adapted)
set(CLANG_C_WARNINGS
-Wall
-Wextra
-Wshadow
-Wcast-align
-Wunused
-Wpedantic
-Wconversion
-Wsign-conversion
-Wnull-dereference
-Wdouble-promotion
-Wformat=2
-Wimplicit-fallthrough
)
set(GCC_C_WARNINGS ${CLANG_C_WARNINGS})
if(CMAKE_C_COMPILER_ID MATCHES ".*Clang")
set(PROJECT_WARNINGS_C ${CLANG_C_WARNINGS})
elseif(CMAKE_C_COMPILER_ID STREQUAL "GNU")
set(PROJECT_WARNINGS_C ${GCC_C_WARNINGS})
endif()
target_compile_options(${target_name}
PRIVATE
$<$<COMPILE_LANGUAGE:CXX>:${PROJECT_WARNINGS_CXX}>
$<$<COMPILE_LANGUAGE:C>:${PROJECT_WARNINGS_C}>
)
endfunction()
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