* libc/stdlib/ldtoa.c (_ldtoa_r): Fix code to allocate the format
buffer based on the precision, after we have processed the input value
in a local buffer and know its relative magnitude.
* configure.host: Support long double I/O for x86-linux.
* libc/stdlib/ldtoa.c (_ldtoa_r): Fix code to allocate a buffer
large enough to hold formatted result.
* libc/machine/powerpc/simdldtoa.c (_simdldtoa_r): Ditto.
* libc/stdlib/ldtoa.c (_ldcheck): New routine
that categorizes a long double as NaN, Infinity, or other.
* libc/stdio/vfprintf.c [WANT_IO_LONG_DBL](_VFPRINTF_R): Removed
isinfl and isnanl static routines which were i386-specific. Changed
calls to the two removed routines to a single _ldcheck call.
* libc/stdio/vfieeefp.h (ldieee): Fixed missing semi-colons.
* libc/stdlib/Makefile.am: Added ldtoa.c to list of sources.
* libc/stdlib/Makefile.in: Regenerated.
* libc/stdio/floatio.h: Added suitable MAXEXP for long double.
* libc/stdio/vfieeefp.h: Added long double bit structures.
* libc/stdio/vfprintf.c[WANT_IO_LONG_DBL]: Added long double support.
[WANT_IO_LONG_DBL](isinfl, isnanl): New static long double routines.
(exponent): Changed expbuf to reasonable maximum instead of MAXEXP.
* libc/stdio/vfscanf.c[WANT_IO_LONG_DBL]: Added long double support.
* libc/stdlib/ldtoa.c: New file containing _ldtoa_r and
_strtold routines used for conversions between character
and long double.
Jeff Johnston
Matthew Green