I'm using GCC 4.7.2 from devtoolset package on CentOS 5 (CentOS 5 because we need compatibility with old Linuxes, and GCC 4.7 because it optimizes better than 4.4).

There is one symbols that prevents my binaries from running on RHEL4: __stack_chk_fail@GLIBC_2.4. It is included only in some C++ programs and the -fno-stack-protector flag doesn't help.

Here is minimal program that reproduces the problem (but the same using stdio.h works):

#include <iostream>
int main(int argc, char *argv[]) {
    for(int i=0; i < argc; i++)
        std::cout << " " << argv[i];
    return 0;

When compiled with optimization (-O/-O2) it references __stack_chk_fail.

$ g++ -fno-stack-protector -O2 foo.cc
$ readelf -s a.out | grep chk
    15: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __stack_chk_fail@GLIBC_2.4 (5)
   105: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __stack_chk_fail@@GLIBC_2

Any idea why this symbol gets here and how to get rid of it?

Just in case, full readelf output and gcc -v is here.

Edit: This problem may be specific to Red Hat Developer Toolset 1.1. With default CentOS compiler __stack_chk_fail is not referenced.

2 Answers 2


This symbol comes from libstdc++_nonshared.a.

Unlike GCC from the distro, GCC from devtoolset has non-shared part of libstdc++. libstdc++.so in GCC 4.7 is a linker script that uses libstdc++ from GCC 4.1 and extra functions linked statically:

$ cat /opt/centos/devtoolset-1.1/root/usr/lib/gcc/i386-CentOS-linux/4.7.2/libstdc++.so
/* GNU ld script
   Use the shared library, but some functions are only in
   the static library, so try that secondarily.  */
INPUT ( /usr/lib/libstdc++.so.6 -lstdc++_nonshared )

After recompiling libstdc++_nonshared.a with disabled stack protector the final program can be run on RHEL4.


It comes with GLibC. Build against an older GLibC.

You can tell GCC 4.7 to emit optimized assembly code and then assemble and link that on an older system

  • 1
    well, the symbol is defined in glibc, as can be seen from versioning @GLIBC_2.4, but why is it referenced in this simple program, regardless of -fno-stack-protector? Moving assembly around can be done for this minimal example, but the real project has thousands of files and complex build system.
    – marcin
    Sep 12, 2013 at 0:56

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