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73 lines
2.6 KiB
Plaintext
73 lines
2.6 KiB
Plaintext
menu "Newlib"
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choice NEWLIB_STDOUT_LINE_ENDING
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prompt "Line ending for UART output"
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default NEWLIB_STDOUT_LINE_ENDING_CRLF
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help
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This option allows configuring the desired line endings sent to UART
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when a newline ('\n', LF) appears on stdout.
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Three options are possible:
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CRLF: whenever LF is encountered, prepend it with CR
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LF: no modification is applied, stdout is sent as is
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CR: each occurence of LF is replaced with CR
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This option doesn't affect behavior of the UART driver (drivers/uart.h).
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config NEWLIB_STDOUT_LINE_ENDING_CRLF
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bool "CRLF"
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config NEWLIB_STDOUT_LINE_ENDING_LF
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bool "LF"
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config NEWLIB_STDOUT_LINE_ENDING_CR
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bool "CR"
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endchoice
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choice NEWLIB_STDIN_LINE_ENDING
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prompt "Line ending for UART input"
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default NEWLIB_STDIN_LINE_ENDING_CR
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help
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This option allows configuring which input sequence on UART produces
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a newline ('\n', LF) on stdin.
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Three options are possible:
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CRLF: CRLF is converted to LF
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LF: no modification is applied, input is sent to stdin as is
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CR: each occurence of CR is replaced with LF
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This option doesn't affect behavior of the UART driver (drivers/uart.h).
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config NEWLIB_STDIN_LINE_ENDING_CRLF
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bool "CRLF"
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config NEWLIB_STDIN_LINE_ENDING_LF
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bool "LF"
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config NEWLIB_STDIN_LINE_ENDING_CR
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bool "CR"
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endchoice
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config NEWLIB_NANO_FORMAT
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bool "Enable 'nano' formatting options for printf/scanf family"
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default n
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help
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ESP32 ROM contains parts of newlib C library, including printf/scanf family
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of functions. These functions have been compiled with so-called "nano"
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formatting option. This option doesn't support 64-bit integer formats and C99
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features, such as positional arguments.
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For more details about "nano" formatting option, please see newlib readme file,
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search for '--enable-newlib-nano-formatted-io':
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https://sourceware.org/newlib/README
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If this option is enabled, build system will use functions available in
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ROM, reducing the application binary size. Functions available in ROM run
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faster than functions which run from flash. Functions available in ROM can
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also run when flash instruction cache is disabled.
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If you need 64-bit integer formatting support or C99 features, keep this
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option disabled.
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endmenu # Newlib
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