Add installation instructions for m4 on mac (#8929)

## Problem
Building on MacOS failed due to missing m4. Although a window was
popping up claiming to install m4, this was not helping.

## Summary of changes
Add instructions to install m4 using brew and link it (thanks to Folke
for helping).
This commit is contained in:
Stefan Radig
2024-09-05 17:48:51 +02:00
committed by GitHub
parent ebddda5b7f
commit fd12dd942f

View File

@@ -64,6 +64,12 @@ brew install protobuf openssl flex bison icu4c pkg-config
echo 'export PATH="$(brew --prefix openssl)/bin:$PATH"' >> ~/.zshrc
```
If you get errors about missing `m4` you may have to install it manually:
```
brew install m4
brew link --force m4
```
2. [Install Rust](https://www.rust-lang.org/tools/install)
```
# recommended approach from https://www.rust-lang.org/tools/install