Bug#678589: gcc-4.7: Fails to build glibc (git master) [amd64]: '__EI___isnan' aliased to external symbol '__GI___isnan'

[Jonathan Nieder <jrnieder@gmail.com>]

Hi,

Daniel Schepler wrote:

> When I try to build glibc, the git master branch, on Debian sid amd64,
> I get this error:
[...]
> ../sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c:30:1: error: '__EI___isnan' aliased to external symbol '__GI___isnan'
[...]
> I tried building upstream GCC 4.7.1 with a configuration as close as
> possible to Debian's:
[...]
>                                                         Once that was
> done building, `pwd`/gcc/xgcc -B`pwd`/gcc -c /tmp/s_isnan.i -o
> /tmp/s_isnan.o worked fine from the build directory

As mentioned in /usr/share/doc/gcc-4.7/README.Debian.<arch>.gz, gcc
4.7.1-1 had some later changes from the 4.7 branch applied, if I
remember correctly, which could account for the difference.

How does 4.7.1-2 do?

Curious,
Jonathan