dyld: Library not loaded: /usr/local/opt/isl/lib/libisl.21.dylib

Question

I'm trying to get set-up with QMK to write my own key maps for a Rama M6-c.

When running make wilba_tech/rama_works_m6_b:default, which is also used for the Rama M6-c, I keep receiving the following message:

dyld: Library not loaded: /usr/local/opt/isl/lib/libisl.21.dylib

within my terminal.

The error message is

internal compiler error: Abort trap: 6 signal terminated program cc1.

I've tried the suggested commands mentioned on QMK's website to no success.

I've also tried upgrading homebrew, uninstalling homebrew, re-installing homebrew, fixing any warnings from homebrew's doctor command, re-running util/qmk_install.sh, upgrading node, and switching node versions.

Has anyone else experienced this issue recently or have any suggestions/fixes?

• OS: macOS Catalina
• node: 12.14.0 (default set through NVM)
• device: Rama M6-c

Answer 1

Try updating the reference to isl :

install_name_tool -change '/usr/local/opt/isl/lib/libisl.21.dylib' /usr/local/opt/isl/lib/libisl.dylib /usr/local/Cellar/avr-gcc@8/8.3.0/libexec/gcc/avr/8.3.0/cc1

Answer 2

This very issue is described in the FAQ:

https://docs.qmk.fm/#/faq_build?id=avr-gcc-internal-compiler-error-abort-trap-6-program-cc1-on-macos

This is an issue with updating on brew, causing symlinks that avr-gcc depend on getting mangled.

The solution is to remove and reinstall all affected modules.

brew rm avr-gcc
brew rm avr-gcc@8
brew rm dfu-programmer
brew rm dfu-util
brew rm gcc-arm-none-eabi
brew rm arm-gcc-bin@8
brew rm avrdude
brew install avr-gcc@8
brew install dfu-programmer
brew install dfu-util
brew install arm-gcc-bin@8
brew install avrdude
brew link --force avr-gcc@8
brew link --force arm-gcc-bin@8

And after that, run this command to force use v8:

brew link --overwrite avr-gcc@8 --force

It will fix your problem. At least it did for me.

Answer 3

This happened for me on a Mac while running the musl.cc cross compilers. I solved it via

brew install isl

Answer 4

Since I can't comment yet ...

You want this specifically:

install_name_tool -change '/usr/local/opt/isl/lib/libisl.21.dylib' /usr/local/opt/isl/lib/libisl.dylib /usr/local/Cellar/avr-gcc@8/8.3.0/libexec/gcc/avr/8.3.0/cc1
install_name_tool -change '/usr/local/opt/isl/lib/libisl.21.dylib' /usr/local/opt/isl/lib/libisl.dylib /usr/local/Cellar/avr-gcc@8/8.3.0/libexec/gcc/avr/8.3.0/lto1

So that both compiling and LTO work (if you use it).