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compilation-and-building-faq.md 2.81 KB

# Compilation and Building FAQ<a name="EN-US_TOPIC_0000001060804832"></a>

-   [Invalid -- w option](#section1019152312222)
-   [Ncurses library not found](#section21449422618)
-   [Mcopy not found](#section12477184992615)
-   [No riscv file or directory](#section178451337202716)
-   [No Crypto](#section1241481172819)
-   [Unexpected operator](#section3691222152919)

## Invalid -- w option<a name="section1019152312222"></a>

-   **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The Ninja version in the compilation environment is outdated and does not support the  **--w**  option.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](../get-code/acquiring-tools.md)  to obtain the provided compilation toolchain.

## Ncurses library not found<a name="section21449422618"></a>

-   **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
    ```

## Mcopy not found<a name="section12477184992615"></a>

-   **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
    ```

## No riscv file or directory<a name="section178451337202716"></a>

-   **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**.

## No Crypto<a name="section1241481172819"></a>

-   **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
        ```

## Unexpected operator<a name="section3691222152919"></a>

-   **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
    ```

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提交于 2021-04-08 16:33 . fixed bugs

Compilation and Building FAQ

Invalid -- w option
Ncurses library not found
Mcopy not found
No riscv file or directory
No Crypto
Unexpected operator

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.

Ncurses library not found

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
```

Mcopy not found

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

No riscv file or directory

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.

No Crypto

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
```

Unexpected operator

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

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