# # For a description of the syntax of this configuration file, # see the file kconfig-language.txt in the NuttX tools repository. # comment "Non-standard Library Support" config LIBC_CRC64_FAST bool "Fast CRC64" default n ---help--- Enable the CRC64 lookup table to compute the CRC64 faster. config LIBC_KBDCODEC bool "Keyboard CODEC" default n ---help--- In NuttX, a keyboard/keypad driver is simply a character driver that may have an (optional) encoding/decoding layer on the data returned by the character driver. A keyboard may return simple text data (alphabetic, numeric, and punctuation) or control characters (enter, control-C, etc.). However, in addition, most keyboards support actions that cannot be represented as text data. Such actions include things like cursor controls (home, up arrow, page down, etc.), editing functions (insert, delete, etc.), volume controls, (mute, volume up, etc.) and other special functions. Some special encoding may be required to multiplex these two classes of data. This option enables the functions that implement the encoding and decoding of keyboard data. These are the interfaces prototyped in include/nuttx/input/kbd_codec.h. While not correctly a part of the C library, it is included here because the decoding side of this interface must be accessible by end user programs. config LIBC_SLCDCODEC bool "Segment LCD CODEC" default n ---help--- In NuttX, a character-oriented, segment LCD (SLCD) driver is simply a character device that may have an (optional) encoding/decoding layer on the data provided to the SLCD driver. The application may provide simple text data (alphabetic, numeric, and punctuation) or control characters (enter, control-C, etc.). However, in addition, most SLCDs support actions that cannot be represented as text data. Such actions include things like cursor controls (home, up arrow, page down, etc.) and other special functions (e.g., blinking). Some special encoding may be required to multiplex these two classes of data. This option enables the functions that implement the encoding and decoding of SLCD data. These are the interfaces prototyped in include/nuttx/lcd/slcd_codec.h. While not correctly a part of the C library, it is included here because the encoding side of this interface must be accessible by end user programs. config LIBC_ENVPATH bool "Support PATH Environment Variable" default n depends on !DISABLE_ENVIRON ---help--- Use the contents of the common environment variable to locate executable or library files. Default: n config FDSAN bool "Enable Fdsan" default n ---help--- Enable the fdsan support config FDCHECK bool "Enable fdcheck" default n depends on SCHED_HAVE_PARENT ---help--- Enable the fdcheck support config LIBC_FTOK_VFS_PATH string "Relative path to ftok storage" default "/var/ftok" ---help--- The relative path to where ftok will exist in the root namespace. config LIBC_MEM_FD_VFS_PATH string "Relative path to memfd storage" default "memfd" depends on FS_TMPFS ---help--- The relative path to where memfd will exist in the tmpfs namespace.