Compilation and Building FAQ

Invalid -- w option

Problem

The compilation fails, and usr/sbin/ninja: invalid option -- w is displayed.
Cause

The Ninja version in the compilation environment is outdated and does not support the --w option.
Solution

Uninstall Ninja and GN and follow the instructions provided in Acquiring Tools to obtain the provided compilation toolchain.

Problem

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

The ncurses library is not installed.
Solution
```
sudo apt-get install lib32ncurses5-dev
```

Problem

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

Mcopy is not installed.

Solution

sudo apt-get install dosfstools mtools

Problem

The compilation fails, and the following information is displayed: riscv32-unknown-elf-gcc: error trying to exec 'cc1': execvp: No such file or directory.
Cause

Permission is required to access files in the riscv compiler path.
Solution
1. Run the following command to query the directory where gcc_riscv32 is located:
```
which riscv32-unknown-elf-gcc
```
2. Run the chmod command to change the directory permission to 755.

Problem

The compilation fails, and No module named'Crypto loaded is displayed.
Cause

Crypto is not installed in Python 3.
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
```

Problem

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

The compilation environment is shell instead of bash.

Solution

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