https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68665
--- Comment #5 from Robert Shuler <mc1soft at yahoo dot com> --- I just did a from-scratch installation on a different computer (at the office) with Win7 of cygwin-64 GCC and the quad math package. The results are exactly the same. Built-in _float128 works, but identical error messages trying to use the functions. In this case, however THE DLLs ARE MISSING. Here is result of trying -lquadmath on the office installation. $ gcc -lquadmath -o test128a test128a.c /tmp/ccEh0rVO.o:test128a.c:(.text+0x9f): undefined reference to `quadmath_snprintf' /tmp/ccEh0rVO.o:test128a.c:(.text+0x9f): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `quadmath_snprintf' collect2: error: ld returned 1 exit status That is what I'd expect given the missing dll's. I'll try it on the WinXP installation this evening and post the result here.
