Build Failure on 64 bit Fedora 21

["Martin Fouts" <fouts at fogey dot com>]

Symptom:
Ld cannot find libc during check to see if gcc can compile a statically
linked program.

Explanation:

When running ./ct-ng build the error below appears in the log and the build
terminates.
On Fedora 21, at least on 64 bit systems, the static libraries are not
installed by default.

Status:

UNCONFIRMED  (I assume that's what a first report should be marked as.)

Fix:

Uncertain.  Perhaps modifying the error handling for the test to see if the
error is a missing library and clarifying that it appears static libraries
are not installed?

Workaround:

Install the static libraries.  Actually, this is part of the fix as well.  I
only marked it as a workaround because I think the scripts could be made
more robust in addition.

To install:

sudo yum install glibc-static

The actual  error report:

[ERROR]    collect2: error: ld returned 1 exit status
[ERROR]
[ERROR]  >>
[ERROR]  >>  Build failed in step 'Checking that gcc can compile a trivial
statically linked program (CT_WANTS_STATIC_LINK)'
[ERROR]  >>        called in step '(top-level)'
[ERROR]  >>
[ERROR]  >>  Error happened in: CT_DoExecLog[scripts/functions@257]
[ERROR]  >>        called from: main[scripts/crosstool-NG.sh@546]


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