On Nov 2 23:54, Yaakov (Cygwin/X) wrote: > On 2013-11-02 04:36, Corinna Vinschen wrote: > >On Nov 1 23:23, David Rothenberger wrote: > >>With gcc-4.8.2-1, the following fails: > >> > >>% touch /tmp/t.c > >>% /bin/gcc -c /tmp/t.c > >>gcc: error: spawn: No such file or directory > > Curious, are you seeing real-life references to /bin/gcc? Because > that wouldn't be portable anyway.
The real life problems is that whether it works or not depends on the path order in $PATH. That's not exactly transparent to the user. > /usr/bin and /lib => /usr/lib symlinks) and this worked fine. > AFAICS, the difference there is that /usr/bin is the "real" > directory and /bin is just a symlink, where the reverse is true on > Cygwin and a mount is used instead of a symlink. Exactly. The symlink on Fedora gets transparently converted to the realpath(3) /usr/bin, while on Cygwin there are two realpaths due to the mount. > >Uh oh. That's bad. Maybe it wasn't such a good idea to switch > >libexecdir from /usr/lib to /usr/libexec? It breaks applications > >using relative paths to search other application components when > >run from /bin. > > AFAIK GCC is unique in this regard; relocatibility code is uncommon, > and most other uses of libexecdir definitely use absolute paths. > > >Either we revert libexecdir to /usr/lib, or we will need to add an > >automount point /libexec -> /usr/libexec as for /bin and /lib. > > What if another program references its datadir as ../share/foo? > (I'm pretty sure it does happen, although GCC doesn't, FWIW.) Are > you going to make an automount point for that as well? (Didn't > think so.) Relocatibility simply isn't portable to a /bin == > /usr/bin scenarios, although use of a symlink instead of a mount > might mitigate that. The symlink would help, but we would have to create it during installation. It's ugly, too. > So, while I'm not convinced that this is a huge issue overall, if > "don't do that" isn't good enough, the easiest workaround is to > configure GCC with --libexecdir=/usr/lib. That would be the safer option, I guess. Corinna -- Corinna Vinschen Please, send mails regarding Cygwin to Cygwin Maintainer cygwin AT cygwin DOT com Red Hat
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