160 lines
4.1 KiB
Plaintext
160 lines
4.1 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see misc/tools/kconfig-language.txt.
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#
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config STDIO_BUFFER_SIZE
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int "C STDIO buffer size"
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default 64
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---help---
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Size of buffers using within the C buffered I/O interfaces.
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(printf, putchar, fwrite, etc.).
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config STDIO_LINEBUFFER
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bool "STDIO line buffering"
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default y
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---help---
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Flush buffer I/O whenever a newline character is found in
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the output data stream.
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config NUNGET_CHARS
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int "Number unget() characters"
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default 2
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---help---
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Number of characters that can be buffered by ungetc() (Only if NFILE_STREAMS > 0)
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config LIB_HOMEDIR
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string "Home directory"
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default "/"
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depends on !DISABLE_ENVIRON
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---help---
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The home directory to use with operations like such as 'cd ~'
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config HAVE_LIBM
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bool "Architecture-specific libm.a"
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default n
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---help---
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Architecture specific logic provides an implementation of libm.a
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and a math.h header file that can be found at include/arch/math.h.
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config NOPRINTF_FIELDWIDTH
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bool "Disable sprintf support fieldwidth"
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default n
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---help---
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sprintf-related logic is a
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little smaller if we do not support fieldwidthes
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config LIBC_FLOATINGPOINT
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bool "Enable floating point in printf"
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default n
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---help---
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By default, floating point
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support in printf, sscanf, etc. is disabled.
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config LIBC_STRERROR
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bool "Enable strerror"
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default n
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---help---
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strerror() is useful because it decodes 'errno' values into a human readable
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strings. But it can also require a lot of memory. If this option is selected,
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strerror() will still exist in the build but it will not decode error values.
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This option should be used by other logic to decide if it should use strerror()
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or not. For example, the NSH application will not use strerror() if this
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option is not selected; perror() will not use strerror() is this option is not
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selected (see also NSH_STRERROR).
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config LIBC_STRERROR_SHORT
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bool "Use short error descriptions in strerror()"
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default n
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depends on LIBC_STRERROR
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---help---
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If this option is selected, then strerror() will use a shortened string when
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it decodes the error. Specifically, strerror() is simply use the string that
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is the common name for the error. For example, the 'errno' value of 2 will
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produce the string "No such file or directory" is LIBC_STRERROR_SHORT
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is not defined but the string "ENOENT" is LIBC_STRERROR_SHORT is defined.
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config LIBC_PERROR_STDOUT
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bool "perror() to stdout"
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default n
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---help---
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POSIX requires that perror() provide its output on stderr. This option may
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be defined, however, to provide perror() output that is serialized with
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other stdout messages.
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config LIBC_PERROR_DEVNAME
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string "perror() to device"
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default "/dev/console"
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depends on !LIBC_PERROR_STDOUT
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---help---
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Another non-standard option is to provide perror() output to a logging device
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or file. LIBC_PERROR_DEVNAME may be defined to be any write-able,
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character device (or file).
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config ARCH_LOWPUTC
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bool "Low-level console output"
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default "y"
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---help---
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architecture supports low-level, boot time console output
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config LIB_SENDFILE_BUFSIZE
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int "sendfile() buffer size"
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default 512
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---help---
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Size of the I/O buffer to allocate in sendfile(). Default: 512b
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config ENABLE_ARCH_OPTIMIZED_FUN
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bool "Enable arch optimized functions"
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default n
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---help---
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Allow for architecture optimized implementations
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The architecture can provide optimized versions of the
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following to improve system performance
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The architecture may provide custom versions of certain
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standard header files:
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config ARCH_MATH_H, ARCH_STDBOOL_H, ARCH_STDINT_H
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if ENABLE_ARCH_OPTIMIZED_FUN
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config ARCH_MEMCPY
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bool "memcpy"
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default n
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config ARCH_MEMCMP
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bool "memcmp"
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default n
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config ARCH_MEMMOVE
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bool "memmove"
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default n
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config ARCH_MEMSET
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bool "memset"
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default n
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config ARCH_STRCMP
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bool "strcmp"
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default n
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config ARCH_STRCPY
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bool "strcpy"
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default n
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config ARCH_STRNCPY
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bool "strncpy"
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default n
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config ARCH_STRLEN
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bool "strlen"
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default n
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config ARCH_STRNLEN
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bool "strlen"
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default n
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config ARCH_BZERO
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bool "bzero"
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default n
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endif
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