/usr/include/bits/mathinline.h:156: warning: no previous prototype for `__fdimf'
/usr/include/bits/mathinline.h:161: warning: no previous prototype for `fdimf'
/usr/include/bits/mathinline.h:166: warning: no previous prototype for `__fdim'
/usr/include/bits/mathinline.h:171: warning: no previous prototype for `fdim'