FCS: fix clang warnings
Fix clang
warnings in FCS code after LCG update in !72568.
Use std::abs
instead of fabs
for integer types. Also use other math functions from the std
namespace instead.
Fix clang
warnings in FCS code after LCG update in !72568.
Use std::abs
instead of fabs
for integer types. Also use other math functions from the std
namespace instead.