GMP can be used as a fall-back if you have problems with the MPI library
included within this package.
-'--with-iconv[=DIR]'
+`--with-iconv[=DIR]'
If your system doesn't provide iconv() function in its native libraries
(usually libc) or if this function is broken (e.g. older Solaris systems),
you may want to use libiconv instead. The DIR is the upper path in your
system which contains lib/ and include/ for libiconv (e.g. /usr/local).
+ You may need to use this also if your system has many versions of iconv
+library in different locations.
+
`--without-pthreads'
If you do not want to compile the programs with POSIX multi-threads