On Sat, Sep 28, 2013 at 12:20 AM, niXman <i.nixman@xxxxxxxxx> wrote: > > I successfully build gcc-4.8.1 with c,c++,fortran support on OpenBSD > pre-5.4 using patches from ports, but I can't build with Go support. > Also I successfully build gcc-4.6.x with c,c++,fortran,go support. > The problem is that OpenBSD has no ucontext.h header. > > Error message: > In file included from ../../../../unpack/gcc-4.8.1/libgo/runtime/go-main.c:17:0: > ../../../../unpack/gcc-4.8.1/libgo/runtime/runtime.h:18:22: fatal > error: ucontext.h: No such file or directory > #include <ucontext.h> > ^ > compilation terminated. The current implementation of goroutines in gccgo requires the makecontext, getcontext, and setcontext functions. Those functions were standardized in POSIX-1.2001 but then removed in POSIX-1.2008 with no replacement. Most systems provide them for backward compatibility. However, it is possible that OpenBSD does not. I really don't know. It's possible to fix this by writing processor-dependent functions that would serve the same purpose as the *context functions, and in fact that would be more efficient. But I have not actually done this. Ian
