AuroraMiddleware/Vulkan-Hpp
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Use compile option -fno-strict-aliasing to prevent breaking optimizations due to using reinterpret_cast (#1985)

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Andreas Süßenbach 2024-10-31 08:24:05 +01:00 committed by GitHub
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3
CMakeLists.txt
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@ -63,6 +63,9 @@ function( vulkan_hpp__setup_platform )
else() else()
message( FATAL_ERROR, "Vulkan-Hpp: unhandled platform!" ) message( FATAL_ERROR, "Vulkan-Hpp: unhandled platform!" )
endif() endif()
if( !MSVC )
target_compile_options( ${TARGET_NAME} PRIVATE -fno-strict-aliasing )
endif()
endfunction() endfunction()
function( vulkan_hpp__setup_vulkan_include ) function( vulkan_hpp__setup_vulkan_include )

4
README.md
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@ -846,6 +846,10 @@ Currently, there are just a couple of such defines:
- `VULKAN_HPP_NO_TO_STRING`, which removes the various `vk::to_string` functions on enums and bitmasks. - `VULKAN_HPP_NO_TO_STRING`, which removes the various `vk::to_string` functions on enums and bitmasks.
- `VULKAN_HPP_USE_REFLECT`, this one needs to be defined to use the reflection function on structures. It's very slow to compile, though! - `VULKAN_HPP_USE_REFLECT`, this one needs to be defined to use the reflection function on structures. It's very slow to compile, though!
### Strict aliasing issue
As Vulkan-Hpp often needs to switch between C++ vk-types and corresponding bit-identical C-types, using `reinterpret_cast`, it is highly recommended to use the compile option `-fno-strict-aliasing` to prevent potentially breaking compile optimizations.
## Configuration Options ## Configuration Options
There are a couple of defines you can use to control the feature set and behaviour of `vulkan.hpp`: There are a couple of defines you can use to control the feature set and behaviour of `vulkan.hpp`: