128 lines
4.1 KiB
Plaintext
128 lines
4.1 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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menu "errno Decode Support"
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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 human readable
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strings. But it can also require a lot of memory. If this option is not
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selected, strerror() will still exist in the build but it will not decode error
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values. This option should be used by other logic to decide if it should use
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strerror() or not. For example, the NSH application will not use strerror()
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if this option is not selected; perror() will not use strerror() is this option
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is not 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 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" if LIBC_STRERROR_SHORT
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is not defined but the string "ENOENT" if LIBC_STRERROR_SHORT is defined.
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config LIBC_STRERROR_ERRNUM
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bool "Print unknown error code in strerror()"
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default !LIBC_STRERROR && !DEFAULT_SMALL
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---help---
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If this option is selected, then strerror() will print error code
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for unknown errors like "Unknown error 101". Default enabled when
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LIBC_STRERROR is not selected.
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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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endmenu # errno Decode Support
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menu "memcpy/memset Options"
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config MEMCPY_VIK
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bool "Vik memcpy()"
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default n
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depends on !LIBC_ARCH_MEMCPY
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---help---
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Select this option to use the optimized memcpy() function by Daniel Vik.
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Select this option for improved performance at the expense of increased
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size. See licensing information in the top-level LICENSE file.
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if MEMCPY_VIK
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config MEMCPY_PRE_INC_PTRS
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bool "Pre-increment pointers"
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default n
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---help---
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Use pre-increment of pointers. Default is post increment of pointers.
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config MEMCPY_INDEXED_COPY
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bool "Array indexing"
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default y
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---help---
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Copying data using array indexing. Using this option, disables the
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MEMCPY_PRE_INC_PTRS option.
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config MEMCPY_64BIT
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bool "64-bit memcpy()"
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default n
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---help---
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Compiles memcpy() for architectures that support 64-bit operations
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efficiently.
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endif # MEMCPY_VIK
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config MEMSET_OPTSPEED
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bool "Optimize memset() for speed"
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default n
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depends on !LIBC_ARCH_MEMSET
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---help---
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Select this option to use a version of memcpy() optimized for speed.
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Default: memcpy() is optimized for size.
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config MEMSET_64BIT
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bool "64-bit memset()"
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default n
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depends on MEMSET_OPTSPEED
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---help---
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Compiles memset() for architectures that support 64-bit operations
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efficiently.
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endmenu # memcpy/memset Options
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menu "signal Decode Support"
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config LIBC_STRSIGNAL
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bool "Enable strsignal"
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default y
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---help---
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strsignal() is useful because it decodes signal number values into
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human readable strings. But it can also require additional memory.
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If this option is not selected, strsignal() will still exist in the
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build but it will not decode signal number values to specific string
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equivalents, but a generic string 'Signal X' will be returned for the
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valid signal number value and 'Real-time Signal X' will be returned
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for the valid real-time signal number value.
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config LIBC_STRSIGNAL_SHORT
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bool "Use short message string descriptions in strsignal()"
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default DEFAULT_SMALL
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depends on LIBC_STRSIGNAL
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---help---
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If this option is selected, then strsignal() will use a symbolic value
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string equivalent to the signal number when signal value is decoded.
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For example, the signal value for SIGTRAP will produce the string
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"Trace/breakpoint trap" if LIBC_STRSIGNAL_SHORT is not defined but the
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string "SIGTRAP" if LIBC_STRSIGNAL_SHORT is defined.
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endmenu # signal Decode Support
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