Svante Signell, le Thu 05 May 2011 17:02:27 +0200, a écrit : > The latest emacs version does not compile on GNU/Hurd. When trying with > default settings there is a segfault when compiling > lisp/cedet/srecode/mode.el using the built emacs and dumped code. > Changing the optimization of the C code from -O2 to -O0 resulted an > illegal instruction at the same file, not a big improvement.
Well, that depends. Show the backtraces! :) > he claims that single-threaded programs does not have to bother about > the mach exception thread running in parallel to the main thread. > > 1) Is this the case? Yes: such threads do not receive signals. > 2) Would changing the emacs code to use sigprocmask have the potential > to make any difference here? Except making the warnings go away. Probably not. If there's a difference between both interfaces, it means bugs in glibc, which shall be fixed anyway. > 3) In the man page for pthread_sigmask, there is a test example, showing > that signals could be blocked and handled in a separate thread. However, > when running that code in GNU/Hurd, the output is not as expected (and > tested on GNU/Linux!). Yes: on GNU/Hurd, there is no global sigmask, that's precisely one of the goals of Jeremy's GSoC to fix posix-ness of GNU/Hurd signals vs pthreads. Samuel
