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.

Description:
acos() function: inverse cosine function.

Files:
m4/acos.m4
m4/mathfunc.m4

Depends-on:

configure.ac:
gl_FUNC_ACOS

Makefile.am:

Include:
<math.h>

Link:
$(ACOS_LIBM)

License:
LGPL

Maintainer:
all