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# 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
bool "[DEPRECATED] Minimal libc malloc implementation"
default y
imply COMMON_LIBC_MALLOC
help
[DEPRECATED] Use COMMON_LIBC_MALLOC
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
int "[DEPRECATED] Size of the minimal libc malloc arena"
default -2
depends on COMMON_LIBC_MALLOC
help
[DEPRECATED] Use COMMON_LIBC_MALLOC_ARENA_SIZE
Indicate the size in bytes of the memory arena used for common C
library malloc() implementation when using the minimal C library.
If set to -2, then the value of COMMON_LIBC_MALLOC_ARENA_SIZE
will be used.
config MINIMAL_LIBC_CALLOC
bool "[DEPRECATED] Minimal libc trivial calloc implementation"
default y
help
[DEPRECATED] Use COMMON_LIBC_CALLOC
Enable the minimal libc's trivial implementation of calloc, which
forwards to malloc and memset.
config MINIMAL_LIBC_REALLOCARRAY
bool "[DEPRECATED] Minimal libc trivial reallocarray implementation"
default y
help
[DEPRECATED] Use COMMON_LIBC_REALLOCARRAY
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"
select COMMON_LIBC_TIME if POSIX_CLOCK
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