Summary:
As Zephyr getopt is not really compatible with Posix getopt, rename
Zephyr getopt to sys_getopt.
Background:
Zephyr getopt module was introduced in #31356 to be used by the shell.
Zephyr's getopt is not the standard one. It has multiple APIs which make
it more suited for a system like Zephyr where different components may
want to use it for different purposes. Including APIs to init it,
get and set its internal state etc.
Several Zephyr modules (shell, net, wifi, ztest) use this getopt with
these special APIs. The getopt module is bundled in the POSIX
compatibility API subsystem (CONFIG_POSIX_C_LIB_EXT).
Problem description:
As it is not the standard getopt(), no C library can possibly provide
a Zephyr compatible version (even if such C library were to provide a
standard getopt()). As it is bundled in Zephyr's POSIX API in
CONFIG_POSIX_C_LIB_EXT), multiple components that depend on it are
selecting CONFIG_POSIX_C_LIB_EXT. Zephyr core components should not
depend on the POSIX API in this way.
Changes done in this commit:
Rename the getopt*() APIs to sys_getopt*() and move them into a module
under lib/utils with its own Kconfig option to enable it.
Zephyr's users are changed to use this new component.
The POSIX subsystem can continue providing getopt() by calling the new
sys_getopt() and in that way retain backwards compatibility for external
users.
Signed-off-by: Jukka Rissanen <jukka.rissanen@nordicsemi.no>
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