# Copyright © 2021 Amazon.com, Inc. or its affiliates.
# SPDX-License-Identifier: Apache-2.0

config PICOLIBC_USE_MODULE
	bool "Use picolibc module"
	default y
	select PICOLIBC_MODULE
	help
	  Use picolibc module instead of picolibc included with toolchain

config PICOLIBC_ALIGNED_HEAP_SIZE
	int "Picolibc aligned heap size (bytes)"
	depends on MPU_REQUIRES_POWER_OF_TWO_ALIGNMENT
	depends on USERSPACE
	default 0
	help
	  If user mode is enabled, and MPU hardware has requirements that
	  regions be sized to a power of two and aligned to their size,
	  and user mode threads need to access this heap, then this is necessary
	  to properly define an MPU region for the heap.

	  If this is left at 0, then remaining system RAM will be used for this
	  area and it may not be possible to program it as an MPU region.

config PICOLIBC_LIBC_MAX_MAPPED_REGION_SIZE
	int "Maximum memory mapped for picolibc heap"
	depends on MMU
	default 1048576
	help
	  On MMU-based systems, indicates the maximum amount of memory which
	  will be used for the picolibc malloc() heap. The actual amount of
	  memory used will be the minimum of this value and the amount of
	  free physical memory at kernel boot.

config PICOLIBC_IO_LONG_LONG
	bool "support for long long in integer-only printf/scanf"
	default n
	help
	  Includes support for long long in integer-only printf/scanf. long long
	  types are always supported in the floating-point versions.

config PICOLIBC_IO_FLOAT
	bool "support for floating point values in printf/scanf"
	default n
	help
	  Include floating point support in printf/scanf functions.

if PICOLIBC_USE_MODULE

if PICOLIBC
choice PICOLIBC_OPTIMIZATIONS
	prompt "Optimization level"
	default PICOLIBC_SIZE_OPTIMIZATIONS if SIZE_OPTIMIZATIONS
	default PICOLIBC_SPEED_OPTIMIZATIONS if SPEED_OPTIMIZATIONS
	default PICOLIBC_DEBUG_OPTIMIZATIONS if DEBUG_OPTIMIZATIONS
	default PICOLIBC_NO_OPTIMIZATIONS if NO_OPTIMIZATIONS
	help
	  Note that these flags shall only control the compiler
	  optimization level for picolibc, not the level for the
	  rest of Zephyr

config PICOLIBC_SIZE_OPTIMIZATIONS
	bool "Optimize for size"
	help
	  Compiler optimizations will be set to -Os independently of other
	  options.

config PICOLIBC_SPEED_OPTIMIZATIONS
	bool "Optimize for speed"
	help
	  Compiler optimizations will be set to -O2 independently of other
	  options.

config PICOLIBC_DEBUG_OPTIMIZATIONS
	bool "Optimize debugging experience"
	help
	  Compiler optimizations will be set to -Og independently of other
	  options.

config PICOLIBC_NO_OPTIMIZATIONS
	bool "Optimize nothing"
	help
	  Compiler optimizations will be set to -O0 independently of other
	  options.

endchoice

config PICOLIBC_FAST_STRCMP
	bool "always use fast strcmp paths"
	default y
	help
	  This provides a faster strcmp version even when libc is
	  built in space-optimized mode

config PICOLIBC_IO_C99_FORMATS
	bool "support C99 format additions in printf/scanf"
	default y
	help
	  Includes support for hex floats (in floating-point version) and j, z,
	  t size modifiers.

config PICOLIBC_IO_POS_ARGS
	bool "Support POSIX positional args (e.g. %$1d) in printf/scanf"
	default y
	depends on !PICOLIBC_IO_FLOAT
	help
	  Includes support for positional args (e.g. $1) in integer-only printf
	  and scanf. Positional args are always supported in the floating-point
	  versions.

config PICOLIBC_IO_FLOAT_EXACT
	bool "support for exact float/string conversion"
	default y
	depends on PICOLIBC_USE_MODULE
	help
	  Uses Ryu algorithm for exact binary/decimal float conversions.
	  This ensures that printf values with enough digits can be
	  fed to scanf and generate exactly the same binary value.

config PICOLIBC_LOCALE_INFO
	bool "support locales in libc functions"
	default n
	depends on PICOLIBC_USE_MODULE
	help
	  Includes code for basic locale support

config PICOLIBC_LOCALE_EXTENDED_INFO
	bool "support extended locales in libc functions"
	default n
	depends on PICOLIBC_USE_MODULE
	help
	  Includes code for extended locale support

config PICOLIBC_MULTIBYTE
	bool "support multibyte functions in libc"
	default n
	depends on PICOLIBC_USE_MODULE
	help
	  Includes code for multi-byte characters

config PICOLIBC_PICOEXIT
	bool "use smaller atexit/onexit implementation"
	default y
	depends on PICOLIBC_USE_MODULE
	help
	  Provides a simpler atexit/onexit implementation that doesn't use
	  malloc, but only supports a small number (32) of exit handlers.

config PICOLIBC_MULTITHREAD
	bool "support multiple threads using retargetable locking API"
	default y
	depends on PICOLIBC_USE_MODULE
	help
	  Protects shared data structures in libc with mutexes that use
	  an API which can be retargeted to OS provided routines.

config PICOLIBC_GLOBAL_ERRNO
	bool "use a single global variable for errno"
	depends on PICOLIBC_USE_MODULE
	help
	  Picolibc usually uses a TLS variable for errno, ensuring that
	  multiple threads have a reliable mechanism for detecting libc
	  exceptions. This option switches to a single global errno variable,
	  which can be used to avoid TLS variable usage by the library if
	  necessary.

endif

endif