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[Bug ld/13232] New: Regression: --gc-sections: local symbol `_dl_argv@@G

From: jan.kratochvil at redhat dot com
Subject: [Bug ld/13232] New: Regression: --gc-sections: local symbol `_dl_argv@@GLIBC_PRIVATE' in ld.so is referenced by DSO
Date: Wed, 28 Sep 2011 18:31:26 +0000


             Bug #: 13232
           Summary: Regression: --gc-sections: local symbol
                    `_dl_argv@@GLIBC_PRIVATE' in ld.so is referenced by
           Product: binutils
           Version: 2.23 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
        AssignedTo: address@hidden
        ReportedBy: address@hidden
        Depends on: 13177
    Classification: Unclassified
            Target: x86_64-fedora16-linux-gnu

3475fe928892df696f6ea9b2c912e1379591e736 is the first bad commit

On Wed, 14 Sep 2011 21:14:38 +0200, H.J. Lu wrote:
> 2011-09-14  H.J. Lu  <address@hidden>
>       PR ld/13177
>       * elflink.c (elf_gc_sweep_symbol): Also hide symbols without PLT
>       nor GOT references.

echo 'int main(void){return 0;}'|gcc -o 1.o -c -Wall -x c -;gcc -v -o 1 1.o
-Wall -Wl,--gc-sections

# OK but replace collect2 (old system BFD ld) with BFD HEAD ld:

.../ld/ld-new --build-id --no-add-needed --eh-frame-hdr -m elf_x86_64
--hash-style=gnu -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o 1
-L/usr/lib/gcc/x86_64-redhat-linux/4.6.1/../../../../lib64 -L/lib/../lib64
-L/usr/lib/../lib64 -L/usr/lib/gcc/x86_64-redhat-linux/4.6.1/../../.. 1.o
--gc-sections -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed
-lgcc_s --no-as-needed /usr/lib/gcc/x86_64-redhat-linux/4.6.1/crtend.o

ld-new: 1: local symbol `_dl_argv@@GLIBC_PRIVATE' in
/lib64/ld-linux-x86-64.so.2 is referenced by DSO
ld-new: final link failed: Bad value

Tested on fedora-16-x86_64.  gold works OK.

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