CMAKE_EXE_LINKER_FLAGS__INIT
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Cmake/docs/3.21/variable/cmake exe linker flags config init
CMAKE_EXE_LINKER_FLAGS__INIT
New in version 3.7.
Value used to initialize the CMAKE_EXE_LINKER_FLAGS_ cache entry the first time a build tree is configured. This variable is meant to be set by a toolchain file. CMake may prepend or append content to the value based on the environment and target platform.
See also CMAKE_EXE_LINKER_FLAGS_INIT.
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https://cmake.org/cmake/help/v3.21/variable/CMAKE_EXE_LINKER_FLAGS_CONFIG_INIT.html