gimme/gimmes/gcc

#!/bin/bash
set -o errexit -o pipefail
if [[ "$OS" = "Darwin" ]]; then
	set +o pipefail
	if ! "xcode-select" --version &>/dev/null; then
		echo "Try again after installing the Xcode command-line tools by running:  xcode-select --install"
		exit 1
	fi
	if ! xcodebuild -help &>/dev/null; then
		echo "Try again after agreeing to the Xcode license by running:  sudo xcodebuild -license"
		exit 1
	fi
else
	has gcc  ||  gimme_pkg build-essential
fi