The -fshort-float option controls the size of the
float type.
When building to the C99 standard, all floating-point types must be the
IEEE754 32-bit format. If you are building for C90 standard, you may use this option to
explicitly request the 24-bit form of this format for float objects. When
using the -fno-short-float form of the option, the float
type can be changed to the full 32-bit IEEE754 format. The selection of this option must be
consistent across all modules of the program.