On Tue, 26 May 2015, Jerry Oram wrote:

> checking for C compiler default output file name...
> configure: error: in `/home/joram/alta-sdk/ipnc/ipnc_app/lib/curl/curl-7.28.1':
> configure: error: C compiler cannot create executables
> See `config.log' for more details.

This looks like your libc upgrade caused gcc to get confused. Check what
config.log says about that test failure.

-- 
  / daniel.haxx.se
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