1# Fixing Compilation and Building Errors 2 3 4## "ImportError: No module named apt_pkg" is displayed during the execution of an unidentifiable command 5 6- **Symptom** 7 8 The message "ImportError: No module named apt_pkg" is displayed when an unidentifiable command is executed on the Linux server. 9 10- **Possible Causes** 11 12 There is a compatibility issue of python3-apt. 13 14- **Solution** 15 16 Reinstall python3-apt. 17 18 19 ``` 20 sudo apt-get remove python3-apt 21 sudo apt-get install python3-apt 22 ``` 23 24 25## The message indicating Python cannot be found is displayed during the build process 26 27- **Symptom** 28 29 The following information is displayed during the build process: 30 31 32 ``` 33 -bash: /usr/bin/python: No such file or directory 34 ``` 35 36- **Possible Cause 1** 37 38 Python is not installed. 39 40- **Solution** 41 42 Run the following command to install Python. The following uses Python 3.8 as an example. 43 44 45 ``` 46 sudo apt-get install python3.8 47 ``` 48 49- **Possible Cause 2** 50 51 The soft link to Python does not exist in the **usr/bin** directory. 52 53  54 55- **Solution** 56 57 Run the following commands to add the soft link to Python: 58 59 60 ``` 61 # cd /usr/bin/ 62 # which python3 63 # ln -s /usr/local/bin/python3 python 64 # python --version 65 ``` 66 67 Example: 68 69  70 71 72## The message indicating Python 3 cannot be found is displayed during the build process 73 74- **Symptom** 75 76  77 78- **Possible Causes** 79 80 Python 3 is not installed. 81 82- **Solution** 83 84 Run the following command to install Python 3: 85 86 87 ``` 88 sudo apt-get install python3.8 89 ``` 90 91 92## "configure: error: no acceptable C compiler found in $PATH" is displayed during Python 3 installation 93 94- **Symptom** 95 96 The following information is displayed during the Python 3 installation process: 97 98 99 ``` 100 configure: error: no acceptable C compiler found in $PATH. See 'config.log' for more details 101 ``` 102 103- **Possible Causes** 104 105 GCC is not installed. 106 107- **Solution** 108 1. Run the **apt-get install gcc** command to install **gcc** online. 109 2. Install Python 3. 110 111 112## "-bash: make: command not found" is displayed during Python 3 installation 113 114- **Symptom** 115 116 The following information is displayed during the Python 3 installation process: 117 118 119 ``` 120 -bash: make: command not found 121 ``` 122 123- **Possible Causes** 124 125 make is not installed. 126 127- **Solution** 128 1. Run the **apt-get install make** command to install make online. 129 2. Install Python 3. 130 131 132## "No module named '_ctypes'" is displayed during Python 3 installation 133 134- **Symptom** 135 136 The following information is displayed during the Python 3 installation process: 137 138 139 ``` 140 ModuleNotFoundError: No module named '_ctypes' 141 ``` 142 143- **Possible Causes** 144 145 libffi and libffi-devel are not installed. 146 147- **Solution** 148 1. Run the **apt-get install libffi* -y** command to install libffi and libffi-devel online. 149 2. Install Python 3. 150 151 152## "No module named 'Crypto'" is displayed during the build process 153 154- **Symptom** 155 156 The following information is displayed during the build process: 157 158 159 ``` 160 ModuleNotFoundError: No module named 'Crypto' 161 ``` 162 163- **Possible Causes** 164 165 **Crypto** is not installed. 166 167- **Solution** 168 Method 1: Run the **pip3 install Crypto** command to install **Crypto** online. 169 170 Method 2: Install **Crypto** offline. 171 172 Download the source code from [PyPI](https://pypi.org/project/pycrypto/#files). 173 174  175 176 Save the source package to the Linux server, decompress the package, and run the **python3 setup.py install** command to install **Crypto**. 177 178 Start the build again. 179 180 181## (Hi3861) "No module named 'ecdsa'" is displayed during the build process 182 183- **Symptom** 184 185 The following information is displayed during the build process: 186 187 188 ``` 189 ModuleNotFoundError: No module named 'ecdsa' 190 ``` 191 192- **Possible Causes** 193 194 **ecdsa** is not installed. 195 196- **Solution** 197 Method 1: Run the **pip3 install ecdsa** command to install **ecdsa** online. 198 199 Method 2: Offline installation 200 201 Download the installation package from [PyPI](https://pypi.org/project/ecdsa/#files). 202 203  204 205 Save the installation package to the Linux server and run the **pip3 install ecdsa-0.15-py2.py3-none-any.whl** command to install ecdsa. 206 207 Start the build again. 208 209 210## (Hi3861)" Could not find a version that satisfies the requirement six>=1.9.0" is displayed during the build process 211 212- **Symptom** 213 214 The following information is displayed during the build process: 215 216 217 ``` 218 Could not find a version that satisfies the requirement six>=1.9.0 219 ``` 220 221- **Possible Causes** 222 223 **six** is not installed. 224 225- **Solution** 226 Method 1: Run the **pip3 install six** command to install **six** online. 227 228 Method 2: Install **six** offline. 229 230 Download the installation package from [PyPI](https://pypi.org/project/six/#files). 231 232  233 234 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**. 235 236 Start the build again. 237 238 239## (Hi3861) "cannot find -lgcc" is displayed during the build process 240 241- **Symptom** 242 243 The following information is displayed during the build process: 244 245 246 ``` 247 riscv32-unknown-elf-ld: cannot find -lgcc 248 ``` 249 250- **Possible Causes** 251 252 The gcc_riscv32 path is incorrectly set as follows. There is an extra slash (/) after **bin**. 253 254 255 ``` 256 ~/gcc_riscv32/bin/:/data/toolchain/ 257 ``` 258 259- **Solution** 260 261 Modify the gcc_riscv32 path as follows: 262 263 264 ``` 265 ~/gcc_riscv32/bin:/data/toolchain/ 266 ``` 267 268 269## (Hi3861) An lsb_release error occurs during kconfiglib installation 270 271- **Symptom** 272 273 The following information is displayed during the **kconfiglib** installation process: 274 275 276 ``` 277 subprocess.CalledProcessError: Command '('lsb_release', '-a')' returned non-zero exit status 1. 278 ``` 279 280- **Possible Causes** 281 282 The Python version matched with the **lsb_release** module is different from the current Python version. 283 284- **Solution** 285 286 Run the **find / -name lsb_release** command, for example, **sudo rm -rf /usr/bin/lsb_release** to locate and delete **lsb_release**. 287
