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-tsearch.sh
tests/test-tsearch.c
tests/signature.h
tests/macros.h

Depends-on:
stdint

configure.ac:
TEST_TSEARCH_LIBM=
AC_LINK_IFELSE(
  [AC_LANG_PROGRAM(
     [[#ifndef __NO_MATH_INLINES
       # define __NO_MATH_INLINES 1 /* for glibc */
       #endif
       #include <math.h>
       double x;]],
     [[x = log (x);]])],
  [],
  [TEST_TSEARCH_LIBM=-lm])
AC_SUBST([TEST_TSEARCH_LIBM])
AC_CHECK_FUNCS_ONCE([initstate])

Makefile.am:
TESTS += test-tsearch.sh
check_PROGRAMS += test-tsearch
test_tsearch_LDADD = $(LDADD) @TEST_TSEARCH_LIBM@