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-rw-r--r--nuttx/README.txt11
1 files changed, 9 insertions, 2 deletions
diff --git a/nuttx/README.txt b/nuttx/README.txt
index 340087791..571f8e04e 100644
--- a/nuttx/README.txt
+++ b/nuttx/README.txt
@@ -523,8 +523,15 @@ NuttX Buildroot Toolchain
Disadvantages: This tool chain is not was well supported as some other
toolchains. GNU tools are not my priority and so the buildroot tools
- often get behind. For example, the is still no EABI support in the
- NuttX buildroot toolchain for ARM.
+ often get behind. For example, until recently there was no EABI support
+ in the NuttX buildroot toolchain for ARM.
+
+ NOTE: For Cortex-M3/4, there are OABI and EABI versions of the buildroot
+ toolchains. If you are using the older OABI toolchain the prefix for
+ the tools will be arm-nuttx-elf-; for the EABI toolchin the prefix will
+ be arm-nuttx-eabi-. If you are using the older OABI toolchain with
+ an ARM Cortex-M3/4, you will need to set CONFIG_ARMV7M_OABI_TOOLCHAIN
+ in the .config file in order to pick the right tool prefix.
SHELLS
^^^^^^