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This is a highly hacked up version of the buildroot (see http://buildroot.uclibc.org/). It has been hacked so that it can be used to build the following NuttX-compatible toolchains:
NXFLAT toolchain for use with the ARM7 and ARM9.
arm-elf ARM Cortex-M3 (thumb2) toolchain needed for use with the Luminary LM3Sxxx, NXP 17xxxx, Atmel SAM3u, and STMicro STM32 ports provided with the NuttX releases. NXFLAT toolchain for use with the ARM Cortex-M3.
avr-elf toolchain needed for use with the ATmega128 ports provided with the NuttX releases.
H8/300 toolchain (not currently used in any NuttX configuration).
i486-elf toochain. Why would you want such a thing? On Linux, of course, such a thing is not needed because you can use the installed GCC to build i486 ELF binaries. But that will not work under Cygwin! The Cygwin toolchain (and probably MinGW), build DOS MZ format executables (i.e., .exe files). That is probably not usable for most NuttX targets. Instead, you should use this i486-elf-gcc to generate true ELF binaries under Cygwin.
bfin-elf toolchain not currently used in any NuttX configuration).
m68k-elf toolchain (not currently used in any NuttX configuration).
m68hc11-elf toolchain (not currently used in any NuttX configuration).
m68hc12-elf toolchain. (NOT RECOMMENDED for hcs12; Use m9s12x-elf toolchain)
m9s12x-elf toolchain Supports Freescale m9s12x using binutils 2.18 and gcc 3.3.6 and patches available from http://www.msextra.com/tools courtesy of James Cortina.
m32c-elf toolchain needed for the Renesas M16C NuttX port.
sh-elf toolchain needed for the SH-1 NuttX port.
Supported tool versions include:
See the ChangeLog for recently added features/architectures added.
cp configs/<config-file> .config
configs/README.txt for other configurations and for more detailed
instructions. If your NuttX installation resides at a different location
And set the "Path to the NuttX root directory" appropriately.
You can select to build the NXFLAT toolchain with GCC by selecting the NXFLAT toolchin during the configuration process(you can also select omit building GCC with and only build the NXFLAT toolchain for use with your own GCC toolchain.