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:
Save and restore the working directory, possibly using a child process.

Files:
lib/savewd.h
lib/savewd.c
m4/savewd.m4

Depends-on:
assure
chdir
dosname
errno
extern-inline
fchdir
fcntl-safer
fcntl-h
raise
stdbool
stdlib
sys_wait
xalloc

configure.ac:
gl_SAVEWD

Makefile.am:
lib_SOURCES += savewd.h savewd.c

Include:
"savewd.h"

License:
GPL

Maintainer:
Paul Eggert, Jim Meyering