Are you aware that your linux perl is using long doubles?
I don't think it is. For the expression presented in the original post in this thread, on linux (without long double support) I get the same -95.2443654287109, but on the same machine (and OS), when perl has been built with -Duselongdouble, the output is -95.24436542871095.
Of course, the output of perl -V:archname would tell us for sure.
Cheers,
Rob
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No, I'm not aware of it using long doubles. perl -V gives:
Summary of my perl5 (revision 5 version 10 subversion 0) configuration:
Platform:
osname=linux, osvers=2.6.18-92.1.10.el5, archname=x86_64-linux-thread-multi
....
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=8, prototype=define
....
which suggests to me that it's using ordinary 8 byte doubles.
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