Compilation and Building

Mini and Small Systems

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.

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
```

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
```

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.

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
```
2. Ensure that Python 3.7 or later is installed, and then run the following command to install pycryptodome:
```
sudo pip3 install pycryptodome
```

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

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.

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/
```

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:

Symptom
Possible Causes

Python 3 is not installed.
Solution

Run the following command to install Python 3:
```
sudo apt-get install python3.8
```