Toolchain to be used

[BorjaOuterelo]

Hi.

I am building my application using stm32-e407 provided docker file. On that file I found:

RUN git clone https://bitbucket.org/nuttx/buildroot
# The following error is obtained when using this version:
    # cfns.gperf:101:1: error: ‘gnu_inline’ attribute present on ‘libc_name_p’
    # cfns.gperf:26:14: error: but not here
# RUN cd buildroot && cp configs/cortexm3-eabi-defconfig-4.6.3 .config
RUN cd buildroot && cp configs/cortexm3-eabi-defconfig-4.8.5 .config

# RUN ls
# clone the code
RUN git clone https://github.com/microROS/apps
RUN git clone https://github.com/microROS/NuttX nuttx

# select the configuration of the OLIMEX board
RUN cd nuttx && tools/configure.sh olimex-stm32-e407/nsh

#######################
# Build toolchain
#######################
# copy a script to automate the command "make oldconfig" (interative)
# the command has been generated by the instruction:
#             autoexpect make oldconfig
COPY script.exp /root
RUN chmod +x /root/script.exp
# instead of doing this, we'll use a pre-generated script
# RUN cd buildroot && make oldconfig
RUN cd buildroot && /root/script.exp

# get dependencies required to build the toolchain
RUN apt-get install gettext -y wget
RUN apt-get update && apt-get install -y build-essential bison flex gperf libgmp-dev libmpc-dev libmpfr-dev libisl-dev binutils-dev libelf-dev libexpat-dev
# Build the toolchain, fix with the paths, seems specific to this board
RUN mv buildroot nuttx/buildroot
RUN cd nuttx/buildroot && make

These lines are building the buildroot for the target. A couple of lines underneath: RUN export PATH="/ ":$PATH && cd nuttx && make is found. This builds nuttx and I think the intention is building It with the freshly built buildroot but if I change make for make V=2 I found the following output:

make[2]: Entering directory '/root/apps/nshlib'
CC:  nsh_init.c
arm-none-eabi-gcc -c -fno-builtin -Wall -Wstrict-prototypes -Wshadow -Wundef -Os -fno-strict-aliasing -fno-strength-reduce -fomit-frame-pointer -mcpu=cortex-m4 -mthumb -mfloat-abi=soft -I. -isystem /root/nuttx/include   -pipe -I "/root/apps/include"  nsh_init.c -o  nsh_init.o

On that output something looks wrong to me: arm-none-eabi-gcc that is not any of the tools I have on the intended toolchain root "/root/nuttx/buildroot/build_arm_nofpu/staging_dir/bin/" Is this correct? Which toolchain is the one that I shall be using to compile and link an external library? arm-none-eabi or arm-nuttx-eabi?

Cheers

[imuguruza]

Hi @BorjaOuterelo you should use arm-none-eabi-gcc cross-compiler to build. Is the standard toolchain for STM ARM Cortex devices.

But the idea is to use the one located at the buildroot, which builds the proper for each board. This way the docker file will be self-contained. So the idea is to use the one is deployed under buildroot

[imuguruza]

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