Defined in 3 files as a prototype:
- external/gpl3/gcc/dist/libgcc/libgcc2.h, line 471 (as a prototype)
- sys/external/bsd/compiler_rt/dist/test/Unit/powixf2_test.c, line 22 (as a prototype)
- sys/external/bsd/compiler_rt/dist/test/builtins/Unit/powixf2_test.c, line 22 (as a prototype)