1593954083
Since Zephyr itself does not currently support processes, but conformant applications should still be able to link, add stubs for the remaining POSIX functions in the POSIX_SIGNALS Option Group. The POSIX_SIGNALS Option Group is required for PSE51, PSE52, PSE53, PSE54, and likely many other POSIX Subprofiles. Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
153 lines
4.2 KiB
Plaintext
153 lines
4.2 KiB
Plaintext
# C library
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# Copyright (c) 2016 Intel Corporation
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# SPDX-License-Identifier: Apache-2.0
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config REQUIRES_FULL_LIBC
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prompt "Require complete C library"
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bool
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help
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Select a C library implementation that provides a complete C library
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implementation, rather than the subset provided by MINIMAL_LIBC.
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config REQUIRES_FLOAT_PRINTF
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bool "Requires floating point support in printf"
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select CBPRINTF_FP_SUPPORT if MINIMAL_LIBC
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select NEWLIB_LIBC_FLOAT_PRINTF if NEWLIB_LIBC
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help
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Select a printf implementation that provides a complete
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implementation including floating point support.
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config FULL_LIBC_SUPPORTED
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bool
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help
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Selected when the target has at least one C library that offers a
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complete implementation and which would be selected when
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REQUIRES_FULL_LIBC is set.
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config MINIMAL_LIBC_SUPPORTED
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bool
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default y
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help
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Selected when the target has support for the minimal C library
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config NEWLIB_LIBC_SUPPORTED
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bool
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default y
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depends on "$(TOOLCHAIN_HAS_NEWLIB)" = "y"
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select FULL_LIBC_SUPPORTED
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help
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Selected when the target has support for the newlib C library
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# Picolibc with C++ support in Zephyr SDK is handled by Zephyr SDK's own Kconfig.
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config PICOLIBC_SUPPORTED
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bool
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depends on !NATIVE_APPLICATION
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depends on ("$(TOOLCHAIN_HAS_PICOLIBC)" = "y") || (ZEPHYR_PICOLIBC_MODULE && !REQUIRES_FULL_LIBCPP)
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default y
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select FULL_LIBC_SUPPORTED
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help
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Selected when the target has support for picolibc.
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config NATIVE_LIBC_INCOMPATIBLE
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bool
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help
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Other Kconfig options can select this, if they are not compatible with the
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native/host libC, and should only be compiled with an embedded libC
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menu "C Library"
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choice LIBC_IMPLEMENTATION
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prompt "C Library Implementation"
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default EXTERNAL_LIBC if NATIVE_BUILD && !(NATIVE_LIBRARY && NATIVE_LIBC_INCOMPATIBLE)
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default PICOLIBC
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default NEWLIB_LIBC if REQUIRES_FULL_LIBC
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default MINIMAL_LIBC
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config MINIMAL_LIBC
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bool "Minimal C library"
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depends on !NATIVE_APPLICATION
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depends on !REQUIRES_FULL_LIBC
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depends on MINIMAL_LIBC_SUPPORTED
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imply COMPILER_FREESTANDING
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select COMMON_LIBC_ABORT
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select COMMON_LIBC_STRNLEN
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imply COMMON_LIBC_MALLOC
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imply COMMON_LIBC_CALLOC
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imply COMMON_LIBC_REALLOCARRAY
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help
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Build with minimal C library.
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config PICOLIBC
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bool "Picolibc library"
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select COMMON_LIBC_ABORT
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imply THREAD_LOCAL_STORAGE if ARCH_HAS_THREAD_LOCAL_STORAGE && TOOLCHAIN_SUPPORTS_THREAD_LOCAL_STORAGE
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select LIBC_ERRNO if THREAD_LOCAL_STORAGE
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select NEED_LIBC_MEM_PARTITION
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imply COMMON_LIBC_MALLOC
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depends on !NATIVE_APPLICATION
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depends on PICOLIBC_SUPPORTED
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help
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Build with picolibc library. The picolibc library is built as
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a module if PICOLIBC_MODULE is set, otherwise picolibc is
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expected to be provided by the toolchain.
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config NEWLIB_LIBC
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bool "Newlib C library"
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select COMMON_LIBC_ABORT
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depends on !NATIVE_APPLICATION
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depends on NEWLIB_LIBC_SUPPORTED
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select NEED_LIBC_MEM_PARTITION
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imply POSIX_DEVICE_IO_ALIAS_CLOSE
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imply POSIX_DEVICE_IO_ALIAS_OPEN
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imply POSIX_DEVICE_IO_ALIAS_READ
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imply POSIX_DEVICE_IO_ALIAS_WRITE
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imply POSIX_FD_MGMT_ALIAS_LSEEK
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imply POSIX_FILE_SYSTEM_ALIAS_FSTAT
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imply POSIX_MULTI_PROCESS_ALIAS_GETPID
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imply POSIX_SIGNALS_ALIAS_KILL
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help
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Build with newlib library. The newlib library is expected to be
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part of the SDK in this case.
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config ARCMWDT_LIBC
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bool "ARC MWDT C library"
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depends on !NATIVE_APPLICATION
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depends on "$(ZEPHYR_TOOLCHAIN_VARIANT)" = "arcmwdt"
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help
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C library provided by ARC MWDT toolchain.
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config EXTERNAL_LIBC
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bool "External C library"
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help
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Build with external/user provided C library.
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endchoice # LIBC_IMPLEMENTATION
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config HAS_NEWLIB_LIBC_NANO
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bool
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rsource "common/Kconfig"
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rsource "minimal/Kconfig"
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rsource "newlib/Kconfig"
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rsource "picolibc/Kconfig"
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config STDOUT_CONSOLE
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bool "Send stdout to console"
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depends on CONSOLE_HAS_DRIVER
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depends on !(NATIVE_APPLICATION || (NATIVE_LIBRARY && EXTERNAL_LIBC))
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default y
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help
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This option directs standard output (e.g. printf) to the console
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device, rather than suppressing it entirely. See also EARLY_CONSOLE
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option.
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config NEED_LIBC_MEM_PARTITION
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bool
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help
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Hidden option to signal that a memory partition is needed for
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the C library even though it would not have been enabled
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otherwise.
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endmenu
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