cmake HAVE_FLOORF examples

Illumina/manta src/cmake/cxxConfigure.cmake :40 

check_function_exists(floorf HAVE_FLOORF)

llvm-dcpu16/llvm-dcpu16 cmake/config-ix.cmake :106 

check_symbol_exists(floorf math.h HAVE_FLOORF)

KhronosGroup/SPIRV-LLVM cmake/config-ix.cmake :143 

check_symbol_exists(floorf math.h HAVE_FLOORF)