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[RFC] Hide autogenerated symbols when linking shared libraries

From: Yuri Gribov <tetra2005 at gmail dot com>
To: binutils at sourceware dot org
Date: Sat, 28 Apr 2018 09:25:03 +0100
Subject: [RFC] Hide autogenerated symbols when linking shared libraries

Hi all,

Currently default linker script generates several temporary symbols
which globally visible and unnecessarily increase size of dynamic
symtable:
  $ gcc -shared -fPIC -O2 tmp.c -o tmp.so
  $ readelf --dyn-syms -W tmp.so
  ...
     7: 0000000000201020     0 NOTYPE  GLOBAL DEFAULT   21 _edata
     9: 0000000000201028     0 NOTYPE  GLOBAL DEFAULT   22 _end
    10: 0000000000201020     0 NOTYPE  GLOBAL DEFAULT   22 __bss_start

Is this intentional?

-I

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