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CMake: Use CMAKE_POSITION_INDEPENDENT_CODE instead of explicit -fpic

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This makes CMake pass `-fpie` instead of `-fpic` to the compiler when
building the Kernel and userland *executables*. This allows the compiler
to make certain optimizations based on the fact that the code will be
used in an executable, such as not having to emit `.localalias` symbols.
This leads to a 450 KiB decrease in the size of the Kernel binary.
This commit is contained in:
Daniel Bertalan 2023-08-27 12:13:47 +02:00
parent 4defa401d3
commit 1f747b9132
3 changed files with 3 additions and 3 deletions
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2
CMakeLists.txt
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@ -167,8 +167,6 @@ add_link_options(LINKER:-z,text)
add_link_options(LINKER:--no-allow-shlib-undefined)
add_compile_definitions(SANITIZE_PTRS)
set(CMAKE_CXX_FLAGS_STATIC "${CMAKE_CXX_FLAGS} -static")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pie -fpic")
if (ENABLE_COMPILETIME_FORMAT_CHECK)
add_compile_definitions(ENABLE_COMPILETIME_FORMAT_CHECK)