strtold: New module. * lib/stdlib.in.h (strtold): New declaration. * lib/strtold.c: New file. * lib/strtod.c: Consider USE_LONG_DOUBLE. (STRTOD, LDEXP, HAVE_UNDERLYING_STRTOD, DOUBLE, MIN, MAX, L_, USE_LDEXP): New macros. (LDEXP, scale_radix_exp, parse_number, STRTOD): Adapt for USE_LONG_DOUBLE. (underlying_strtod): Remove function. Replace with some macros. Re-add the code for a missing underlying function that was removed on 2013-02-19. * m4/strtold.m4: New file. * m4/stdlib_h.m4 (gl_STDLIB_H): Test whether strtold is declared. (gl_STDLIB_H_DEFAULTS): Initialize GNULIB_STRTOLD, HAVE_STRTOLD, REPLACE_STRTOLD. * modules/stdlib (Makefile.am): Substitute GNULIB_STRTOLD, HAVE_STRTOLD, REPLACE_STRTOLD. * modules/strtold: New file. * doc/posix-functions/strtold.texi: Document the new module.

Description:
ptsname_r() function: Determine name of the slave side of a pseudo-terminal.

Files:
lib/ptsname_r.c
m4/ptsname_r.m4

Depends-on:
stdlib
extensions
isatty          [test $HAVE_PTSNAME_R = 0 || test $REPLACE_PTSNAME_R = 1]
ttyname_r       [test $HAVE_PTSNAME_R = 0 || test $REPLACE_PTSNAME_R = 1]

configure.ac:
gl_FUNC_PTSNAME_R
if test $HAVE_PTSNAME_R = 0 || test $REPLACE_PTSNAME_R = 1; then
  AC_LIBOBJ([ptsname_r])
  gl_PREREQ_PTSNAME_R
fi
gl_STDLIB_MODULE_INDICATOR([ptsname_r])

Makefile.am:

Include:
<stdlib.h>

License:
LGPLv2+

Maintainer:
Eric Blake