https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66164
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |msebor at gcc dot gnu.org --- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> --- The program calls functions (__sinf and __ieee754_rem_pio2f) without declaring them first. Compiling with the -Wall option highlights the problem. Once the functions are declared before called the program runs succesffully to completion.