135 lines
4.2 KiB
Plaintext
135 lines
4.2 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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comment "Non-standard Library Support"
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config LIBC_CRC64_FAST
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bool "Fast CRC64"
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default n
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---help---
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Enable the CRC64 lookup table to compute the CRC64 faster.
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config LIBC_CRC32_SLOW
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bool "CRC32 not use table to decrease rodata size"
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default n
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---help---
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Optional disable the CRC32 lookup table to decrease rodata usage.
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config LIBC_KBDCODEC
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bool "Keyboard CODEC"
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default n
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---help---
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In NuttX, a keyboard/keypad driver is simply a character driver that
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may have an (optional) encoding/decoding layer on the data returned
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by the character driver. A keyboard may return simple text data
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(alphabetic, numeric, and punctuation) or control characters
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(enter, control-C, etc.). However, in addition, most keyboards
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support actions that cannot be represented as text data. Such
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actions include things like cursor controls (home, up arrow,
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page down, etc.), editing functions (insert, delete, etc.), volume
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controls, (mute, volume up, etc.) and other special functions.
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Some special encoding may be required to multiplex these two classes
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of data.
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This option enables the functions that implement the encoding and
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decoding of keyboard data. These are the interfaces prototyped in
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include/nuttx/input/kbd_codec.h. While not correctly a part of
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the C library, it is included here because the decoding side of this
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interface must be accessible by end user programs.
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config LIBC_SLCDCODEC
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bool "Segment LCD CODEC"
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default n
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---help---
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In NuttX, a character-oriented, segment LCD (SLCD) driver is simply
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a character device that may have an (optional) encoding/decoding
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layer on the data provided to the SLCD driver. The application may
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provide simple text data (alphabetic, numeric, and punctuation) or
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control characters (enter, control-C, etc.). However, in addition,
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most SLCDs support actions that cannot be represented as text data.
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Such actions include things like cursor controls (home, up arrow,
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page down, etc.) and other special functions (e.g., blinking). Some
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special encoding may be required to multiplex these two classes of
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data.
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This option enables the functions that implement the encoding and
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decoding of SLCD data. These are the interfaces prototyped in
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include/nuttx/lcd/slcd_codec.h. While not correctly a part of the C
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library, it is included here because the encoding side of this
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interface must be accessible by end user programs.
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config LIBC_ENVPATH
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bool "Support PATH Environment Variable"
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default n
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depends on !DISABLE_ENVIRON
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---help---
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Use the contents of the common environment variable to locate executable
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or library files. Default: n
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config FDSAN
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bool "Enable Fdsan"
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default n
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---help---
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Enable the fdsan support
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config FDCHECK
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bool "Enable fdcheck"
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default n
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depends on SCHED_HAVE_PARENT
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---help---
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Enable the fdcheck support
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config LIBC_FTOK_VFS_PATH
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string "Relative path to ftok storage"
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default "/var/ftok"
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---help---
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The relative path to where ftok will exist in the root namespace.
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config LIBC_UNAME_DISABLE_TIMESTAMP
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bool "Disable uname timestamp support"
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default n
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---help---
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Currently uname command will print the timestamp
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when the binary was built, and it generates an issue
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because two identical built binaries will have differents
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hashes/CRC.
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choice
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prompt "Select memfd implementation"
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config LIBC_MEMFD_SHMFS
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bool "memfd base on shmfs"
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depends on FS_SHMFS
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config LIBC_MEMFD_TMPFS
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bool "memfd base on tmpfs"
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depends on FS_TMPFS
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config LIBC_MEMFD_ERROR
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bool "memfd return error"
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endchoice
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config LIBC_MEM_FD_VFS_PATH
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string "Relative path to memfd storage"
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default "memfd"
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depends on !LIBC_MEMFD_ERROR
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---help---
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The relative path to where memfd will exist in the tmpfs namespace.
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config LIBC_MAX_PATHBUFFER
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int "Maximum size of a temporary file path buffer array"
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range 0 32
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default 2
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---help---
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This value is the maximum size of the buffer that will hold the full
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file path.
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config LIBC_PATHBUFFER_MALLOC
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bool "Enable malloc pathbuffer"
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default y
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---help---
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Enable malloc path buffer from the heap when pathbuffer is insufficient.
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