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FYI: Fix for gcc PR36312 breaks glibc builds over usage of /dev/null as input and output file.
- From: "Carlos O'Donell" <carlos at redhat dot com>
- To: GNU C Library <libc-alpha at sourceware dot org>
- Date: Wed, 19 Nov 2014 09:44:52 -0500
- Subject: FYI: Fix for gcc PR36312 breaks glibc builds over usage of /dev/null as input and output file.
- Authentication-results: sourceware.org; auth=none
FYI.
The fix for gcc PR36312 breaks glibc builds.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36312
The fix disallows this common configure idiom:
configure:72: checking for AVX support
configure:78: /home/triegel/local/gcc/bin/gcc -mavx -xc /dev/null -S -o /dev/null
gcc: fatal error: input file '/dev/null' is the same as output file
compilation terminated.
configure:81: $? = 1
configure:89: result: no
PR is reopened with a request to fix.
Alternatively we could discuss changing glibc, but I think
this will impact more than just glibc.
Cheers,
Carlos.