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copied!<p>You are correct in that glibc uses symbol versioning. If you are curious, the symbol versioning implementation introduced in glibc 2.1 is described <a href="http://people.redhat.com/drepper/symbol-versioning" rel="noreferrer">here</a> and is an extension of Sun's symbol versioning scheme described <a href="http://download.oracle.com/docs/cd/E19253-01/817-1984/appendixb-45356/index.html" rel="noreferrer">here</a>.</p> <p>One option is to statically link your binary. This is probably the easiest option.</p> <p>You could also build your binary in a chroot build environment, or using a glibc-<em>new</em> => glibc-<em>old</em> cross-compiler. </p> <p>According to the <a href="https://web.archive.org/web/20110208085632/http://www.trevorpounds.com/blog/" rel="noreferrer">http://www.trevorpounds.com</a> blog post <a href="https://web.archive.org/web/20160107032111/http://www.trevorpounds.com/blog/?p=103" rel="noreferrer"><strong><em>Linking to Older Versioned Symbols (glibc)</em></strong></a>, it is possible to to force any symbol to be linked against an older one so long as it is valid by using the the same <em><code>.symver</code></em> pseudo-op that is used for defining versioned symbols in the first place. The following example is excerpted from the <a href="https://web.archive.org/web/20160107032111/http://www.trevorpounds.com/blog/?p=103" rel="noreferrer">blog post</a>.</p> <p>The following example makes use of glibc’s realpath, but makes sure it is linked against an older 2.2.5 version.</p> <pre><code>#include <limits.h> #include <stdlib.h> #include <stdio.h> __asm__(".symver realpath,realpath@GLIBC_2.2.5"); int main() { char* unresolved = "/lib64"; char resolved[PATH_MAX+1]; if(!realpath(unresolved, resolved)) { return 1; } printf("%s\n", resolved); return 0; } </code></pre>

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