Building LibreOffice for x86_64 starting to fail in an odd way recently, <http://koji.fedoraproject.org/koji/getfile?taskID=5091173&name=build.log&offset=-4000>, I stripped that down to what I would assume is a newly introduced bug in how ld resolves weak references?

Given a test.s of

        .text
        .globl main
        .type main, @function
main:
        .quad x
        .weakref x,__pthread_key_create

"gcc test.s" builds fine, while "gcc test.s -lcom_err", i.e., including a reference to some .so that in turn needs libpthread, fails with

/usr/bin/ld: /tmp/cckAPSW1.o: undefined reference to symbol '__pthread_key_create@@GLIBC_2.2.5'
/usr/bin/ld: note: '__pthread_key_create@@GLIBC_2.2.5' is defined in DSO /lib64/libpthread.so.0 so try adding it to the linker command line
/lib64/libpthread.so.0: could not read symbols: Invalid operation
collect2: error: ld returned 1 exit status

The same works fine in F-18.  The failing ld is "GNU ld version 2.23.52.0.1-4.fc19 20130226."

Stephan
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