Bug#331460: gcc-4.0: Some uses of pragma GCC visibility with -fPIC still build position dependent code.

[Mike Hommey <mh@glandium.org>]

Package: gcc-4.0
Version: 4.0.2-2
Severity: important

Building the following code:
#pragma GCC visibility push(hidden)
#pragma GCC visibility push(default)
#include <string.h>
#pragma GCC visibility pop

__attribute__ ((visibility ("default"))) void Func() {
	char c[100];
	memset(c, 0, sizeof(c));
}
(yes, this is the same code as in bug #330279)

gives position dependent code:
mh@namakemono:~$ gcc -fPIC -shared -o test.so test.c
mh@namakemono:~$ objdump --private-headers test.so | grep TEXTREL
  TEXTREL     0x0

If you removing all pragmas in the source code, and build with
-fvisibility=hidden, you get:
mh@namakemono:~$ gcc -fPIC -shared -fvisibility=hidden -o test.so test-nopragma.c
mh@namakemono:~$ objdump --private-headers test.so | grep TEXTREL


-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.12-1-686
Locale: LANG=ja_JP.UTF-8, LC_CTYPE=ja_JP.UTF-8 (charmap=UTF-8)

Versions of packages gcc-4.0 depends on:
ii  binutils             2.16.1cvs20050902-1 The GNU assembler, linker and bina
ii  cpp-4.0              4.0.2-2             The GNU C preprocessor
ii  gcc-4.0-base         4.0.2-2             The GNU Compiler Collection (base 
ii  libc6                2.3.5-6             GNU C Library: Shared libraries an
ii  libgcc1              1:4.0.2-2           GCC support library

Versions of packages gcc-4.0 recommends:
ii  libc6-dev                     2.3.5-6    GNU C Library: Development Librari
pn  libmudflap0-dev               <none>     (no description available)

-- no debconf information