RE: Sigsegv signal while loading libc2.18

[waseem sarwar <waseemsarwar103 at hotmail dot com>]

Thanks Carlos .. The suggested solution works perfect.

--Waseem

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> Date: Fri, 1 Nov 2013 21:41:09 -0400
> Subject: Re: Sigsegv signal while loading libc2.18
> From: carlos@systemhalted.org
> To: waseemsarwar103@hotmail.com
> CC: libc-help@sourceware.org
>
> On Fri, Nov 1, 2013 at 5:16 PM, waseem sarwar
> <waseemsarwar103@hotmail.com> wrote:
>> I have a pre-compiled binary that needs glibc version 2.14 or greater but my current ubuntu 10.04 (intel x86_64 arch) has glibc version 2.11. I decided to compile glibc 2.18 from source on my platform by using the following configuration The compilation succeeds without an issue.
>>
>> ../glibc-2.18/configure --prefix=/root/test_waseem//gnu-c-2.18/ --host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-profile --enable-kernel=2.6.32 libc_cv_forced_unwind=yes libc_cv_ctors_header=yes libc_cv_c_cleanup=yes --with-headers=/usr/include CFLAGS="-O2 -fno-stack-protector -fPIC" CXXFLAGS="-O2 -fno-stack-protector -fPIC"
>
> By setting prefix to something other than /usr you broke the ABI and
> now you need an almost complete root setup under
> /root/test_waseem/gnu-c-2.18/ in order to have the library work
> correctly.
>
>> Now when I try to preload the library using LD_PRELOAD and try to execute the binary, it gives segmentation fault right away. I believe that its giving the seg fault at dynamic loading time as when i try to debug it with gdb, it crashed before the execution starts.
>
> Preload what library? libc.so? You can't do that. The entire library
> along with the dynamic loader and other libraries comprise a core
> runtime that needs to be updated completely and used entirely. You
> can't just preload a new libc.so.
>
>> I have tried a few different configuration params (and with different compiler flags) but nothing works. Please respond with the possible solution. Thanks in advance.
>
> The easiest solution is to install a VM with a distribution that has a
> newer libc.
>
> Cheers,
> Carlos.