八度 io package 在 macOS 上的安装

Question

I've searched the web high and low to no avail so I'm resorting to asking here..

I want to install the io package to Octave 4.4.1 on MacOS Catalina (10.15.5). I've tried installing directly from the Forge and again from the.gz file, but I get the following error every time:

configure: error: in `/var/folders/rh/y2fddn916sg3v_8pkln9z7jr0000gq/T/oct-JsL8yQ/io-2.6.1/src':
configure: error: C++ compiler cannot create executables
See `config.log' for more details
checking for mkoctfile... /Applications/Octave-4.4.1.app/Contents/Resources/usr/Cellar/octave-octave-app@4.4.1/4.4.1/bin/mkoctfile-4.4.1
checking for octave-config... /Applications/Octave-4.4.1.app/Contents/Resources/usr/Cellar/octave-octave-app@4.4.1/4.4.1/bin/octave-config-4.4.1
checking whether the C++ compiler works... no

pkg: error running the configure script for io.
error: called from
    configure_make at line 82 column 9
    install at line 184 column 7
    pkg at line 437 column 9

I know I need to provide the config.log file to troubleshoot but I cannot for my life find this anywhere. So:

1. Where do I find the config file?
2. How do I get io to install?

I don't pretend to know anything about programming so less-technical answers appreciated if possible. I installed Octave using the native mac app version from the website.

Answer 1

configure: error: C++ compiler cannot create executables
...
checking whether the C++ compiler works... no

This generally means that either you have Xcode installed but have not yet run it and accepted the EULA (which you must do once before using Xcode for anything, including command line work), and/or don't have the Xcode Command Line Tools installed (which you can do using sudo xcode-select --install ).

That being said, there are outstanding issues with installing several Octave Forge packages on macOS. If you have further trouble with it, you can drop by the Octave.app repo on GitHub for support.