cmake COMPILER_RT_HAS_FPIE_FLAG examples

Lewuathe/mlir-hello thirdparty/llvm-project/compiler-rt/cmake/config-ix.cmake :95 

check_cxx_compiler_flag(-fPIE                COMPILER_RT_HAS_FPIE_FLAG)

trailofbits/polytracker polytracker/src/compiler-rt/cmake/config-ix.cmake :60 

check_cxx_compiler_flag(-fPIE                COMPILER_RT_HAS_FPIE_FLAG)

CTSRD-CHERI/cheribsd contrib/subrepo-cheri-compiler-rt/cmake/config-ix.cmake :73 

check_cxx_compiler_flag(-fPIE                COMPILER_RT_HAS_FPIE_FLAG)