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159 lines
4.1 KiB
159 lines
4.1 KiB
# |
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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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