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With xdevice.c, if you get an error about conflicting wchar_t types,
you might try compiling it with the -D__UNIXOS2__ option.  This worked
on hemlock, a 32-bit linux system with gcc/gfortran V4.2.

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If on a Cygwin system it complains about M_PI being undefined in cro.c,
trying compiling without -ansi.
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