OrgZephyr/zephyr
OrgZephyr
/
zephyr
mirror of https://github.com/zephyrproject-rtos/zephyr.git
1
0
Fork 0
Code Issues Releases Wiki Activity
zephyr/lib/libc/minimal/Kconfig

105 lines
3.3 KiB
Plaintext
Raw Normal View History

lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
# Copyright (c) 2016 Intel Corporation
# SPDX-License-Identifier: Apache-2.0
if MINIMAL_LIBC
config MINIMAL_LIBC_NON_REENTRANT_FUNCTIONS
bool "Non-reentrant functions"
default y if !USERSPACE
select NEED_LIBC_MEM_PARTITION
help
Enable non-reentrant functions that make use of the globals; e.g.
rand() and gmtime(). The globals must be put into a dedicated C
library memory partition when CONFIG_USERSPACE=y, and enabling this
option may require an additional memory protection region.
config MINIMAL_LIBC_MALLOC
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
bool "[DEPRECATED] Minimal libc malloc implementation"
lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
default y
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
imply COMMON_LIBC_MALLOC
lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
help
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
[DEPRECATED] Use COMMON_LIBC_MALLOC
lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
Enable the minimal libc's implementation of malloc, free, and realloc.
Disable if you wish to provide your own implementations of these functions.
config MINIMAL_LIBC_MALLOC_ARENA_SIZE
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
int "[DEPRECATED] Size of the minimal libc malloc arena"
libc/common: Change how legacy malloc setting works Change the default value of MINIMAL_LIBC_MALLOC_ARENA_SIZE from 0 to an otherwise invalid value of -2. This allows the common malloc code to distinguish between an application which explicitly sets the malloc arena to zero bytes from an application which does not set the variable at all. When MINIMAL_LIBC_MALLOC_ARENA_SIZE is set to a value other than -2, then *always* set COMMON_LIBC_MALLOC_ARENA_SIZE to that value. Emit a compile warning to let the developer know that their application is using a deprecated Kconfig variable. This means that MINIMAL_LIBC_MALLOC_ARENA_SIZE now always overrides COMMON_LIBC_MALLOC_ARENA_SIZE, but an application setting both will already be getting a configuration warning for setting the DEPRECATED value anyways, which should serve as an adequate indication to the user. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-05-02 01:24:19 +08:00
default -2
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
depends on COMMON_LIBC_MALLOC
lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
help
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
[DEPRECATED] Use COMMON_LIBC_MALLOC_ARENA_SIZE
libc/common: Change how legacy malloc setting works Change the default value of MINIMAL_LIBC_MALLOC_ARENA_SIZE from 0 to an otherwise invalid value of -2. This allows the common malloc code to distinguish between an application which explicitly sets the malloc arena to zero bytes from an application which does not set the variable at all. When MINIMAL_LIBC_MALLOC_ARENA_SIZE is set to a value other than -2, then *always* set COMMON_LIBC_MALLOC_ARENA_SIZE to that value. Emit a compile warning to let the developer know that their application is using a deprecated Kconfig variable. This means that MINIMAL_LIBC_MALLOC_ARENA_SIZE now always overrides COMMON_LIBC_MALLOC_ARENA_SIZE, but an application setting both will already be getting a configuration warning for setting the DEPRECATED value anyways, which should serve as an adequate indication to the user. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-05-02 01:24:19 +08:00
Indicate the size in bytes of the memory arena used for common C
library malloc() implementation when using the minimal C library.
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
libc/common: Change how legacy malloc setting works Change the default value of MINIMAL_LIBC_MALLOC_ARENA_SIZE from 0 to an otherwise invalid value of -2. This allows the common malloc code to distinguish between an application which explicitly sets the malloc arena to zero bytes from an application which does not set the variable at all. When MINIMAL_LIBC_MALLOC_ARENA_SIZE is set to a value other than -2, then *always* set COMMON_LIBC_MALLOC_ARENA_SIZE to that value. Emit a compile warning to let the developer know that their application is using a deprecated Kconfig variable. This means that MINIMAL_LIBC_MALLOC_ARENA_SIZE now always overrides COMMON_LIBC_MALLOC_ARENA_SIZE, but an application setting both will already be getting a configuration warning for setting the DEPRECATED value anyways, which should serve as an adequate indication to the user. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-05-02 01:24:19 +08:00
If set to -2, then the value of COMMON_LIBC_MALLOC_ARENA_SIZE
will be used.
lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
config MINIMAL_LIBC_CALLOC
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
bool "[DEPRECATED] Minimal libc trivial calloc implementation"
lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
default y
help
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
[DEPRECATED] Use COMMON_LIBC_CALLOC
lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
Enable the minimal libc's trivial implementation of calloc, which
forwards to malloc and memset.
config MINIMAL_LIBC_REALLOCARRAY
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
bool "[DEPRECATED] Minimal libc trivial reallocarray implementation"
lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
default y
help
lib/libc: Move malloc from minimal to common library This will (eventually) permit use of a common malloc implementation with other C libraries, reducing the amount of Zephyr-specific code required to support each C library. Signed-off-by: Keith Packard <keithp@keithp.com>
2023-03-29 12:24:23 +08:00
[DEPRECATED] Use COMMON_LIBC_REALLOCARRAY
lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
Enable the minimal libc's trivial implementation of reallocarray, which
forwards to realloc.
config MINIMAL_LIBC_LL_PRINTF
bool "Build with minimal libc long long printf" if !64BIT
default y if 64BIT
help
Build with long long printf enabled. This will increase the size of
the image.
config MINIMAL_LIBC_OPTIMIZE_STRING_FOR_SIZE
bool "Use size optimized string functions"
default y if SIZE_OPTIMIZATIONS
help
Enable smaller but potentially slower implementations of memcpy and
memset. On the Cortex-M0+ this reduces the total code size by 120 bytes.
config MINIMAL_LIBC_RAND
bool "Rand and srand functions"
help
Enable rand_r() for the minimal libc.
In order to make use of the non-reentrant rand() and srand(), it is
necessary to set CONFIG_MINIMAL_LIBC_NON_REENTRANT_FUNCTIONS=y.
config MINIMAL_LIBC_TIME
bool "Time functions"
libc: share time() between minimal libc and armclang libc Introduce a place to share implementations of libc functions that are needed by different libc versions. Place time() in this common location so it can be shared when building for either minimal libc or armclang libc. Signed-off-by: Kumar Gala <kumar.gala@intel.com>
2023-03-25 03:10:50 +08:00
select COMMON_LIBC_TIME if POSIX_CLOCK
libc: Move gmtime_r into common gmtime_r() has been in the minimal libc for years, however it was not added to expcetions due to an overlook. In order to do this however, it has to be moved first to the common libc area, so that it's available to any libc that may not implement it. Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
2024-02-01 20:36:17 +08:00
select COMMON_LIBC_GMTIME_R
lib: libc: Move minimal libc configs to lib/libc/minimal/Kconfig This commit relocates the minimal libc configurations under the top- level libc Kconfig to a new Kconfig under `lib/libc/minimal` for improved organisation of the libc configurations. Signed-off-by: Stephanos Ioannidis <stephanos.ioannidis@nordicsemi.no>
2022-12-07 17:18:37 +08:00
default y
help
Enable time() and gmtime_r() for the minimal libc.
time() requires CONFIG_POSIX_CLOCK=y because it relies on the POSIX
clock_gettime() function.
In order to make use of the non-reentrant gmtime(), it is necessary
to set CONFIG_MINIMAL_LIBC_NON_REENTRANT_FUNCTIONS=y.
config MINIMAL_LIBC_STRING_ERROR_TABLE
bool "String error table for strerror() and strerror_r()"
help
Select this option to ensure that streror(), strerror_r()
produce strings corresponding to the descriptions in errno.h.
The string error table can add ~2kiB to ROM. As such, it is
disabled by default. In this case, strerror() and strerror_r()
symbols are still present, but the functions produce an empty
string.
endif # MINIMAL_LIBC