[Bug build/33734] New: glibc configure messes up on clang because of -Werror

[dilfridge at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=33734

            Bug ID: 33734
           Summary: glibc configure messes up on clang because of -Werror
           Product: glibc
           Version: 2.41
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: dilfridge at gentoo dot org
                CC: carlos at redhat dot com
  Target Milestone: ---

Bug report from memory... 

When I tried to configure glibc from master with CC=clang CXX=clang++ for the
first time (clang-21), configuration failed with odd problems.

Digging into configure.log, what happened was that
* clang unconditionally received linker flags of the type -Wl,...
* these led to a warning about unused command line arguments during compilation
* which were turned into errors by -Werror
* resulting in random configure test results.

My workaround for Gentoo was to add -Wno-unused-command-line-argument

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