http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58849
--- Comment #2 from otmar.struwe at web dot de --- After updating some parts of the mingw environment (mpfr/gmp/mpc) I am not able to reproduce the described behavior. Now I get: c:\temp\ccWxAggU.o:complex.c:(.text+0xef): undefined reference to `csin' collect2.exe: error: ld returned 1 exit status The compiler is the still the same.