'openssl/err.h': No such file or directory

Troubleshooting 'openssl/err.h': No Such File or Directory

When using aioquic on Windows, you may encounter the 'openssl/err.h': No such file or directory error if the OpenSSL header files and libraries are not properly configured.

Solution 1: Environment Variable Configuration

• Identify OpenSSL Installation Directories:
  • Use choco list openssl to find the installation directory. A common location is C:\ProgramData\chocolatey\lib\openssl\tools\mingw64\include.
  • Identify the library directory: C:\ProgramData\chocolatey\lib\openssl\tools\mingw64\lib.
• Set Environment Variables:
  • Open a command prompt with administrator privileges.
  • Set the INCLUDE variable to point to the OpenSSL include directory:

  setx INCLUDE "C:\ProgramData\chocolatey\lib\openssl\tools\mingw64\include" /M
  

  • Set the LIB variable to point to the OpenSSL library directory:

  setx LIB "C:\ProgramData\chocolatey\lib\openssl\tools\mingw64\lib" /M
  

  • Close the command prompt and open a new one for changes to take effect.

Solution 2: Compiler Flags

If environment variables alone don't work, explicitly pass compiler flags during installation:

pip install -e . CFLAGS=-I/path/to/openssl/include LDFLAGS=-L/path/to/openssl/lib

Replace /path/to/openssl/include and /path/to/openssl/lib with actual directories.

Solution 3: Reinstall OpenSSL

Consider uninstalling and reinstalling OpenSSL using Chocolatey to ensure proper directory structure and environment variables:

choco uninstall openssl
choco install openssl

After implementing any of these solutions, try installing aioquic again with pip install -e ..