Fails to build softfloat.c on OS/X

[nigelhorne]

softfloat.c: ./softfloat.h:45: invalid struct field declarations
softfloat.c: ./softfloat.h:45: syntax error; found /' expecting }'
softfloat.c: ./softfloat.h:45: skipping /' /' bits32' high'
softfloat.c: ./softfloat.h:45: empty declaration
softfloat.c: ./softfloat.h:45: syntax error; found ,' expecting ;'
softfloat.c: ./softfloat.h:45: skipping ,' softfloat.c: ./softfloat.h:47: redeclaration of low' previously declared at ./softfloat.h:45
softfloat.c: ./softfloat.h:49: unrecognized declaration
softfloat.c: ./softfloat.h:126: syntax error; found int32_to_float64' expecting ;'
softfloat.c: ./softfloat.h:138: syntax error; found float32_to_float64' expecting ;'
softfloat.c: ./softfloat.h:180: extraneous old-style parameter list
softfloat.c: ./softfloat.h:182: extraneous old-style parameter list
softfloat.c: ./softfloat.h:184: extraneous old-style parameter list
softfloat.c: ./softfloat.h:192: syntax error; found float64_round_to_int' expecting ;'
softfloat.c: ./softfloat.h:192: extraneous old-style parameter list
softfloat.c: ./softfloat.h:194: syntax error; found float64_add' expecting ;'
softfloat.c: ./softfloat.h:194: duplicate declaration for float64' previously declared at ./softfloat.h:194 softfloat.c: ./softfloat.h:194: extraneous old-style parameter list softfloat.c: ./softfloat.h:196: syntax error; found float64_sub' expecting ;' softfloat.c: ./softfloat.h:196: duplicate declaration for float64' previously declared at ./softfloat.h:196
softfloat.c: ./softfloat.h:196: too many errors

[yaseen-elolemy]

I have quite the same problem on linux
The readme doesn't say about any dependencies to install