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The <a class="external" href="http://www.gnu.org/software/gmp/gmp.html"><img src="moin-www.png" alt="[WWW]" height="11" width="11">GnuMP</a> (GNU multiprecision library) is a library for arbitrary precision integer arithmetic.  MLton uses the GnuMP to implement the <a href="BasisLibrary"> Basis Library</a> <tt>IntInf</tt> module. <p>
There is a known problem with the GnuMP, where it requires a lot of stack space for some computations, e.g. <tt>IntInf.toString</tt> of a million digit number.  If you run with stack size limited, you may see a segfault in such programs.  This problem is mentioned in the <a class="external" href="http://www.swox.com/gmp/#FAQ"><img src="moin-www.png" alt="[WWW]" height="11" width="11">GnuMP FAQ</a>, where they describe two solutions. 
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 Increase (or unlimit) your stack space.  From your program, use  <tt>setrlimit</tt>, or from the shell, use <tt>ulimit</tt>. 
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 Configure and rebuild <tt>libgmp</tt> with <tt>--disable-alloca</tt>, which  will cause it to allocate temporaries using <tt>malloc</tt> instead of on the  stack. 
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Last edited on 2007-08-15 22:06:35 by <span title="fenrir.uchicago.edu"><a href="MatthewFluet">MatthewFluet</a></span>.
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