Prompt
When configuring CMake builds, carefully select compiler and linker flags that optimize for performance while maintaining cross-platform compatibility. Performance-oriented flags can significantly impact runtime speed, binary size, and resource utilization, but must be applied conditionally based on the target platform and compiler.
Key practices:
- Research the performance implications of compilation flags before applying them (e.g.,
DYNAMIC_EXECUTION=0may slow down WebAssembly bindings) - Use conditional compilation to apply platform-specific optimizations (e.g.,
--gc-sectionsfor GCC/Clang vs--dead_stripfor AppleClang) - Enable standard performance flags like
CMAKE_POSITION_INDEPENDENT_CODE ONfor better code generation - Consider alternative optimization strategies when default flags cause performance regressions
Example of conditional linker optimization:
target_link_options(yoga PRIVATE
# Discard unused sections
$<$<CONFIG:RELEASE>:$<$<CXX_COMPILER_ID:Clang,GNU>:-Wl,--gc-sections>>
$<$<CONFIG:RELEASE>:$<$<CXX_COMPILER_ID:AppleClang>:-Wl,-dead_strip>>)
This approach ensures optimal performance across different build environments while avoiding platform-specific build failures.