Instruct macos users to use avr-gcc@7 (#3337)
If you run `brew install avr-gcc`, you get a version that has compatibility issues with LUFA. I updated the getting started guide for osx, the qmk_install setup script, and added a section to the FAQ for folks like me who accidentally updated avr-gcc past 7.
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@ -104,3 +104,17 @@ brew install dfu-programmer
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brew install gcc-arm-none-eabi
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brew install avrdude
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```
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### avr-gcc 8.1 and LUFA
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If you updated your avr-gcc to above 7 you may see errors involving LUFA. For example:
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`lib/lufa/LUFA/Drivers/USB/Class/Device/AudioClassDevice.h:380:5: error: 'const' attribute on function returning 'void'`
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For now, you need to rollback avr-gcc to 7 in brew.
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```
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brew uninstall --force avr-gcc
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brew install avr-gcc@7
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brew link avr-gcc@7
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```
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@ -56,7 +56,7 @@ If you're using [homebrew,](http://brew.sh/) you can use the following commands:
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brew tap osx-cross/avr
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brew tap PX4/homebrew-px4
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brew update
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brew install avr-gcc
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brew install avr-gcc@7
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brew install dfu-programmer
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brew install gcc-arm-none-eabi
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brew install avrdude
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@ -22,4 +22,4 @@ fi
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brew tap osx-cross/avr
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brew tap PX4/homebrew-px4
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brew update
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brew install avr-gcc gcc-arm-none-eabi dfu-programmer avrdude
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brew install avr-gcc@7 gcc-arm-none-eabi dfu-programmer avrdude
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