# newlib second-part options config LIBC_NEWLIB_IO_C99FMT bool prompt "Enable IOs on C99 formats" help Enable support for IOs on C99 formats. config LIBC_NEWLIB_IO_LL bool prompt "Enable IOs on long long" help Enable support for IOs on long long integers. config LIBC_NEWLIB_IO_FLOAT bool prompt "Enable IOs on floats and doubles" help Enable support for IOs on floating point values (float and double). config LIBC_NEWLIB_IO_LDBL bool prompt "Enable IOs on long doubles" depends on LIBC_NEWLIB_IO_FLOAT help Enable support for IOs on long doubles. config LIBC_NEWLIB_DISABLE_SUPPLIED_SYSCALLS bool prompt "Disable the syscalls supplied with newlib" help Disable the syscalls that come with newlib. You will have to implement your own _sbrk, _read, _write... If you plan to port newlib to a new platform/board, say Yes. config LIBC_NEWLIB_ENABLE_TARGET_OPTSPACE bool prompt "Optimize newlib for size" default y help Pass --enable-target-optspace to newlib configure. This will compile newlib with -Os. config LIBC_NEWLIB_NANO_MALLOC bool prompt "Enable Nano Malloc" depends on LIBC_NEWLIB_2_1_or_later help NEWLIB has two implementations of malloc family's functions, one in `mallocr.c' and the other one in `nano-mallocr.c'. This options enables the nano-malloc implementation, which is for small systems with very limited memory. Note that this implementation does not support `--enable-malloc-debugging' any more. config LIBC_NEWLIB_NANO_FORMATTED_IO bool prompt "Enable Nano Formatted I/O" depends on LIBC_NEWLIB_2_2_or_later help This builds NEWLIB with a special implementation of formatted I/O functions, designed to lower the size of application on small systems with size constraint issues. This option does not affect wide-char formatted I/O functions. config LIBC_NEWLIB_EXTRA_CONFIG_ARRAY string prompt "Extra config for newlib" default "" help Extra flags to pass onto ./configure when configuring the newlib.