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Regression: --gc-sections: local symbol `_dl_argv@@GLIBC_PRIVATE' in ld.so is referenced by DSO (PR ld/13232) [Re: PATCH: PR ld/13177: garbage collector retains zombie references to external libraries]
- From: Jan Kratochvil <jan dot kratochvil at redhat dot com>
- To: "H.J. Lu" <hjl dot tools at gmail dot com>
- Cc: binutils at sourceware dot org
- Date: Wed, 28 Sep 2011 20:32:14 +0200
- Subject: Regression: --gc-sections: local symbol `_dl_argv@@GLIBC_PRIVATE' in ld.so is referenced by DSO (PR ld/13232) [Re: PATCH: PR ld/13177: garbage collector retains zombie references to external libraries]
- References: <20110914191438.GA4795@intel.com>
Hi H.J.,
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 <hongjiu.lu@intel.com>
>
> 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 /usr/lib/gcc/x86_64-redhat-linux/4.6.1/../../../../lib64/crt1.o /usr/lib/gcc/x86_64-redhat-linux/4.6.1/../../../../lib64/crti.o /usr/lib/gcc/x86_64-redhat-linux/4.6.1/crtbegin.o -L/usr/lib/gcc/x86_64-redhat-linux/4.6.1 -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 /usr/lib/gcc/x86_64-redhat-linux/4.6.1/../../../../lib64/crtn.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.
Thanks,
Jan