On Wed, Sep 4, 2013 at 12:01 AM, Jakub Jelinek <ja...@redhat.com> wrote: > That looks wrong, the test was intentionally looking for badly implemented > vsnprintf, see > http://www.gnu.org/software/gnulib/manual/html_node/snprintf.html > "This function does not return a byte count as specified in C99 on some > platforms: HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 9, mingw." > > The implementation relies on the returned byte count to be exactly correct, > so it can't be implemented on platforms where that is not the case.
Ah; thanks for the pointer. > Not sure which of the targets from the above list we still support, > certainly at least mingw, though in that case I don't know if it hasn't been > fixed there. So, as Joseph said, you probably should keep the runtime test > as is, and just for cross compiling replace the unconditional =undef with > an optimistic assumption followed by a blacklist of platforms where it is > known not to work. That makes sense. Am I correct in understanding that the list I need to be concerned with is only the one you quote? I have access to a mingw compiler, so I can easily give that a test in a current version. The glibc manual has a list of supported/tested platforms, and all of the above other than mingw are listed as "occasionally tested" as of 2011, so they should probably all be listed in the blacklist: https://www.gnu.org/software/gnulib/manual/html_node/Target-Platforms.html Thanks, - Brooks
