105 lines
3.3 KiB
Plaintext
105 lines
3.3 KiB
Plaintext
# Copyright (c) 2016 Intel Corporation
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# SPDX-License-Identifier: Apache-2.0
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if MINIMAL_LIBC
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config MINIMAL_LIBC_NON_REENTRANT_FUNCTIONS
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bool "Non-reentrant functions"
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default y if !USERSPACE
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select NEED_LIBC_MEM_PARTITION
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help
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Enable non-reentrant functions that make use of the globals; e.g.
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rand() and gmtime(). The globals must be put into a dedicated C
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library memory partition when CONFIG_USERSPACE=y, and enabling this
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option may require an additional memory protection region.
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config MINIMAL_LIBC_MALLOC
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bool "[DEPRECATED] Minimal libc malloc implementation"
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default y
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imply COMMON_LIBC_MALLOC
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help
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[DEPRECATED] Use COMMON_LIBC_MALLOC
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Enable the minimal libc's implementation of malloc, free, and realloc.
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Disable if you wish to provide your own implementations of these functions.
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config MINIMAL_LIBC_MALLOC_ARENA_SIZE
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int "[DEPRECATED] Size of the minimal libc malloc arena"
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default -2
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depends on COMMON_LIBC_MALLOC
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help
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[DEPRECATED] Use COMMON_LIBC_MALLOC_ARENA_SIZE
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Indicate the size in bytes of the memory arena used for common C
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library malloc() implementation when using the minimal C library.
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If set to -2, then the value of COMMON_LIBC_MALLOC_ARENA_SIZE
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will be used.
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config MINIMAL_LIBC_CALLOC
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bool "[DEPRECATED] Minimal libc trivial calloc implementation"
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default y
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help
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[DEPRECATED] Use COMMON_LIBC_CALLOC
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Enable the minimal libc's trivial implementation of calloc, which
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forwards to malloc and memset.
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config MINIMAL_LIBC_REALLOCARRAY
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bool "[DEPRECATED] Minimal libc trivial reallocarray implementation"
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default y
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help
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[DEPRECATED] Use COMMON_LIBC_REALLOCARRAY
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Enable the minimal libc's trivial implementation of reallocarray, which
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forwards to realloc.
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config MINIMAL_LIBC_LL_PRINTF
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bool "Build with minimal libc long long printf" if !64BIT
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default y if 64BIT
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help
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Build with long long printf enabled. This will increase the size of
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the image.
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config MINIMAL_LIBC_OPTIMIZE_STRING_FOR_SIZE
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bool "Use size optimized string functions"
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default y if SIZE_OPTIMIZATIONS
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help
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Enable smaller but potentially slower implementations of memcpy and
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memset. On the Cortex-M0+ this reduces the total code size by 120 bytes.
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config MINIMAL_LIBC_RAND
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bool "Rand and srand functions"
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help
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Enable rand_r() for the minimal libc.
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In order to make use of the non-reentrant rand() and srand(), it is
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necessary to set CONFIG_MINIMAL_LIBC_NON_REENTRANT_FUNCTIONS=y.
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config MINIMAL_LIBC_TIME
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bool "Time functions"
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select COMMON_LIBC_TIME if POSIX_CLOCK
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select COMMON_LIBC_GMTIME_R
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default y
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help
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Enable time() and gmtime_r() for the minimal libc.
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time() requires CONFIG_POSIX_CLOCK=y because it relies on the POSIX
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clock_gettime() function.
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In order to make use of the non-reentrant gmtime(), it is necessary
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to set CONFIG_MINIMAL_LIBC_NON_REENTRANT_FUNCTIONS=y.
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config MINIMAL_LIBC_STRING_ERROR_TABLE
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bool "String error table for strerror() and strerror_r()"
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help
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Select this option to ensure that streror(), strerror_r()
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produce strings corresponding to the descriptions in errno.h.
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The string error table can add ~2kiB to ROM. As such, it is
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disabled by default. In this case, strerror() and strerror_r()
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symbols are still present, but the functions produce an empty
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string.
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endif # MINIMAL_LIBC
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