'Cabal: Missing (or bad) C libraries: ssl, crypto

When I do cabal v2-build on macOS Monterey 12.3.1, I get the following error:

Failed to build hlibgit2-0.18.0.14. The failure occurred during the configure
step.
Build log ( /Users/user/.cabal/logs/ghc-8.10.7/hlbgt2-0.18.0.14-40f04fe4.log
):
Configuring library for hlibgit2-0.18.0.14..
cabal: Missing dependencies on foreign libraries:
* Missing (or bad) C libraries: ssl, crypto
This problem can usually be solved by installing the system packages that
provide these libraries (you may need the "-dev" versions). If the libraries
are already installed but in a non-standard location then you can use the
flags --extra-include-dirs= and --extra-lib-dirs= to specify where they are.If
the library files do exist, it may contain errors that are caught by the C
compiler at the preprocessing stage. In this case you can re-run configure
with the verbosity flag -v3 to see the error messages.

cabal: Failed to build hlibgit2-0.18.0.14 (which is required by
exe:app from app-0.0.0). See the build log above
for details.

What I tried so far:

  • brew install ssl
  • brew install gpg
  • Recommendations from here
  • Recommendations from here

All to no avail. Any help is appreciated.

macoshaskellcabalcabal-installpythonpython-3.xmacos


Solution 1:[1]

Type which python3 to uncover where you have your python executable. In my case it is /usr/local/bin/python3 directory.

Your python file should contain a shebang referencing the executable as the first line in the file. So, for example:

#!/usr/local/bin/python3

Next, you must make sure that the file itself is executable.

Some files have different permissions (files can be read / write / execute and by different groups user / group / everyone). Execute on the terminal sudo chmod +x your_python_file.py.

Finally, you should add the directory where your file script is saved to your system $PATH.

In your terminal execute:

cd $HOME && mkdir bin

Put your python script in this bin directory. Then add the bin directory to your system $PATH by running:

export PATH="$HOME/bin:$PATH"

Solution 2:[2]

To make it executable without saying python first, put

#!/usr/bin/env python

as the first line and make the file executable.

To make it executable from any location, put the script in a directory that's in your $PATH environment variable.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1
Solution 2 Barmar

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