1d92d0b5ff
Accurately applying clock skew correction in `timeutil_sync_ref_from_local` and `timeutil_sync_local_from_ref` requires double-precision floating point operations. If this is the only usage of double precision logic in the build, but clocks skews are not used, this can be a significant ROM overhead. Disabling this option can save ~2.4 kB of ROM. Signed-off-by: Jordan Yates <jordan@embeint.com>
112 lines
3.4 KiB
Plaintext
112 lines
3.4 KiB
Plaintext
# Copyright (c) 2016 Intel Corporation
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# SPDX-License-Identifier: Apache-2.0
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menu "Utility Library"
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config JSON_LIBRARY
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bool "Build JSON library"
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help
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Build a minimal JSON parsing/encoding library. Used by sample
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applications such as the NATS client.
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config JSON_LIBRARY_FP_SUPPORT
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bool "Floating point support in JSON library"
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depends on JSON_LIBRARY
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select CBPRINTF_FP_SUPPORT
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select REQUIRES_FULL_LIBC
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help
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Build the JSON library with support for floating point types.
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Requires a libc implementation with support for floating point
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functions: strtof(), strtod(), isnan() and isinf().
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config RING_BUFFER
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bool "Ring buffers"
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help
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Provide highly efficient ring buffer management for arbitrary data.
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Some facilities such as kernel pipes are built on top of this.
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May be used directly e.g. when the pipe overhead is unnecessary.
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config RING_BUFFER_LARGE
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bool "Allow large ring buffer sizes"
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depends on RING_BUFFER
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help
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Increase maximum buffer size from 32KB to 2GB. When this is enabled,
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all struct ring_buf instances become 12 bytes bigger.
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config NOTIFY
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bool "Asynchronous Notifications"
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help
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Use this API to support async transactions.
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config BASE64
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bool "Base64 encoding and decoding"
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help
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Enable base64 encoding and decoding functionality
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config ONOFF
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bool "On-Off Manager"
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select NOTIFY
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help
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An on-off manager supports an arbitrary number of clients of a
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service which has a binary state. Example applications are power
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rails, clocks, and binary device power management.
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config WINSTREAM
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bool "Lockless shared memory window byte stream"
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help
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Winstream is a byte stream IPC for use in shared memory
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"windows", generally for transmit to non-Zephyr contexts that
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can't share Zephyr APIs or data structures.
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if WINSTREAM
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config WINSTREAM_STDLIB_MEMCOPY
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bool "Use standard memcpy() in winstream"
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help
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The sys_winstream utility is sometimes used in early boot
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environments before the standard library is usable. By
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default it uses a simple internal bytewise memcpy(). Set
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this to use the one from the standard library.
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endif
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config UTF8
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bool "UTF-8 string operation supported"
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help
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Enable the utf8 API. The API implements functions to specifically
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handle UTF-8 encoded strings.
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config COBS
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bool "Consistent overhead byte stuffing"
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select NET_BUF
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help
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Enable consistent overhead byte stuffing
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config GETOPT
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bool "Getopt library support"
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help
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This option adds support of the sys_getopt API.
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config GETOPT_LONG
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bool "Getopt long library support"
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depends on GETOPT
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help
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This option adds support of the getopt long.
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Different shell backends are using their own instance of getopt to
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not interfere with each other.
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All not shell threads share one global instance of getopt state, hence
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apart from shell this library is not thread safe. User can add support
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for other threads by extending function sys_getopt_state_get in
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getopt_common.c file.
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config TIMEUTIL_APPLY_SKEW
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bool "Support applying clock skew corrections in conversion functions"
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default y
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help
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Accurately applying clock skew correction in timeutil_sync_ref_from_local
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and timeutil_sync_local_from_ref requires double-precision floating point
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operations. If this is the only usage of double precision logic in the
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build, but clocks skews are not used, this can be a significant ROM
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overhead. Disabling this option can save ~2.4 kB of ROM.
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endmenu
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