Compilation and Building

Mini and Small Systems

“usr/sbin/ninja: invalid option – w”

• Symptom

The build fails, and usr/sbin/ninja: invalid option – w is displayed.

• Possible Causes

The Ninja version in use does not support the –w option.

• Solution

Uninstall Ninja and GN, and install Ninja and GN of the required version.

”/usr/bin/ld: cannot find -lncurses”

• Symptom

The build fails, and /usr/bin/ld: cannot find -lncurses is displayed.

• Possible Causes

The ncurses library is not installed.

• Solution

  sudo apt-get install lib32ncurses5-dev

“line 77: mcopy: command not found”

• Symptom

The build fails, and line 77: mcopy: command not found is displayed.

• Possible Causes

mcopy is not installed.

• Solution

  sudo apt-get install dosfstools mtools

“riscv32-unknown-elf-gcc: error trying to exec ‘cc1’: execvp: No such file or directory”

• Symptom

The build fails, and the following information is displayed:
riscv32-unknown-elf-gcc: error trying to exec ‘cc1’: execvp: No such file or directory

• Possible Causes

You do not have the required permission to access files in the RISC-V compiler directory.

• Solution

  1. Run the following command to locate gcc_riscv32:

   which riscv32-unknown-elf-gcc
  

  1. Run the chmod command to change the directory permission to 755.

“No module named ‘Crypto’”

• Symptom

The build fails, and No module named ‘Crypto’ is displayed.

• Possible Causes

Crypto is not installed in Python3.

• Solution

  1. Run the following command to query the Python version:

    python3 --version
  

  1. Ensure that Python 3.7 or later is installed, and then run the following command to install pycryptodome:

    sudo pip3 install pycryptodome
  

“xx.sh: xx unexpected operator”

• Symptom

The build fails, and xx.sh [: xx unexpected operator is displayed.

• Possible Causes

The build environment shell is not bash.

• Solution

  sudo rm -rf /bin/sh
  sudo ln -s /bin/bash /bin/sh

“Could not find a version that satisfies the requirement six>=1.9.0”

• Symptom

The following information is displayed during the build process:

  Could not find a version that satisfies the requirement six>=1.9.0

• Possible Causes

six is not installed.

• Solution

Method 1: Run the pip3 install six command to install six online.

Method 2: Install six offline.

1. Download the installation package from PyPI.

1. Save the source code to the Linux server and run the pip3 install six-1.14.0-py2.py3-none-any.whl command to install six.

2. Start the build again.

“cannot find -lgcc”

• Symptom

The following information is displayed during the build process:

  riscv32-unknown-elf-ld: cannot find -lgcc

• Possible Causes

The gcc_riscv32 path is incorrectly set as follows. There is an extra slash (/) after bin.

  ~/gcc_riscv32/bin/:/data/toolchain/

• Solution

Modify the gcc_riscv32 path as follows:

  ~/gcc_riscv32/bin:/data/toolchain/

Failed to Find Python

• Symptom

The following information is displayed during the build process:

  -bash: /usr/bin/python: No such file or directory

• Possible Cause 1

Python is not installed.

• Solution

Run the following command to install Python. The following uses Python 3.8 as an example.

  sudo apt-get install python3.8

• Possible Cause 2

The soft link to Python does not exist in the usr/bin directory.

• Solution

Run the following commands to add the soft link to Python:

  # cd /usr/bin/ 
  # which python3
  # ln -s /usr/local/bin/python3 python
  # python --version

Example:

Failed to Find Python3

• Symptom

• Possible Causes

Python 3 is not installed.

• Solution

Run the following command to install Python 3:

  sudo apt-get install python3.8

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