long-options: add parse_gnu_standard_options_only Discussed in https://bugs.gnu.org/33468 . * lib/long-options.c (parse_long_options): Use EXIT_SUCCESS instead of 0. (parse_gnu_standard_options_only): Add function to process the GNU default options --help and --version and fail for any other unknown long or short option. See https://gnu.org/prep/standards/html_node/Command_002dLine-Interfaces.html . * lib/long-options.h (parse_gnu_standard_options_only): Declare it. * modules/long-options (depends-on): Add stdbool, exitfail. * top/maint.mk (sc_prohibit_long_options_without_use): Update syntax-check rule, add new function name.

Files:
tests/test-duplocale.c
tests/signature.h
tests/macros.h
m4/intl-thread-locale.m4

Depends-on:
langinfo

configure.ac:
AC_CHECK_FUNCS_ONCE([duplocale strfmon_l snprintf_l nl_langinfo_l])
AC_CHECK_HEADERS_ONCE([monetary.h])
gt_FUNC_USELOCALE

Makefile.am:
TESTS += test-duplocale
check_PROGRAMS += test-duplocale