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Re: gcc-4.8.2-1: /bin/gcc fails
- From: "Yaakov (Cygwin/X)" <yselkowitz at users dot sourceforge dot net>
- To: cygwin at cygwin dot com
- Date: Sat, 02 Nov 2013 23:54:30 -0500
- Subject: Re: gcc-4.8.2-1: /bin/gcc fails
- Authentication-results: sourceware.org; auth=none
- References: <52749A63 dot 70803 at acm dot org> <20131102093635 dot GB25012 at calimero dot vinschen dot de>
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.
I did try this on Fedora (recent version of which use /bin => /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.
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.
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
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