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List:       llvm-bugs
Subject:    [LLVMbugs] [Bug 4639] New: section .tbss triggers assembler warning
From:       bugzilla-daemon () cs ! uiuc ! edu
Date:       2009-07-28 17:27:15
Message-ID: bug-4639-206 () http ! llvm ! org/bugs/
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http://llvm.org/bugs/show_bug.cgi?id=4639

           Summary: section .tbss triggers assembler warning
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Backend: X86
        AssignedTo: unassignedbugs@nondot.org
        ReportedBy: nlewycky@google.com
                CC: llvmbugs@cs.uiuc.edu


Given x.cc:

static __thread int i;
int* foo() { return &i; }

$ llvm-gcc -O2 x.cc -c -o x.o
/tmp/cc8Qh1Nc.s: Assembler messages:
/tmp/cc8Qh1Nc.s:16: Warning: setting incorrect section type for .tbss

The problem is the .section declaration:

        .section                .tbss,"awT",@progbits

which under GCC 4.2 reads:

        .section        .tbss,"awT",@nobits


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