smartbotic/cmake/CompilerFlags.cmake

# Compiler flags for SmartBotic

# Warning flags
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
    add_compile_options(
        -Wall
        -Wextra
        -Wpedantic
        -Wno-unused-parameter
        -Wno-missing-field-initializers
    )

    # Debug flags
    if(CMAKE_BUILD_TYPE STREQUAL "Debug")
        add_compile_options(-g -O0 -DDEBUG)
        # Note: _GLIBCXX_DEBUG is disabled because it causes ABI incompatibility
        # with pre-compiled system libraries (gRPC, etc.)
        # add_compile_definitions(_GLIBCXX_DEBUG)
    endif()

    # Release flags
    if(CMAKE_BUILD_TYPE STREQUAL "Release")
        add_compile_options(-O3 -DNDEBUG)
        add_compile_options(-flto)
        add_link_options(-flto)
    endif()

    # RelWithDebInfo flags
    if(CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
        add_compile_options(-O2 -g -DNDEBUG)
    endif()
endif()

# MSVC flags (for potential Windows support)
if(MSVC)
    add_compile_options(/W4 /permissive-)
    add_compile_definitions(_CRT_SECURE_NO_WARNINGS)

    if(CMAKE_BUILD_TYPE STREQUAL "Debug")
        add_compile_options(/Od /Zi)
    else()
        add_compile_options(/O2)
    endif()
endif()

# Enable colored output
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
    add_compile_options(-fdiagnostics-color=always)
elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
    add_compile_options(-fcolor-diagnostics)
endif()

# Position independent code
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

# Address Sanitizer. CLAUDE.md documents
#   cmake -DCMAKE_BUILD_TYPE=Debug -DENABLE_ASAN=ON ..
# as how to build this project with ASAN - this option is what makes that
# command actually do it, rather than silently produce an ordinary
# non-sanitized build (which is exactly what happened before this option
# existed: the flag was documented but had no matching cmake option, so it
# was ignored with no error). -fno-omit-frame-pointer keeps ASAN's stack
# traces readable; leak detection rides along with ASAN on Linux/macOS
# rather than needing -fsanitize=leak separately.
option(ENABLE_ASAN "Build with AddressSanitizer (and leak detection) enabled" OFF)
if(ENABLE_ASAN)
    if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang")
        add_compile_options(-fsanitize=address -fno-omit-frame-pointer)
        add_link_options(-fsanitize=address)
    else()
        message(WARNING "ENABLE_ASAN was requested but the compiler (${CMAKE_CXX_COMPILER_ID}) "
                         "is not GNU or Clang; AddressSanitizer was not enabled")
    endif()
endif()