Helper script to build a branch+target combination for gcc.

build-worktree.sh

#!/bin/bash

worktree_root=PATH_TO/gcc-worktrees
gcc_root=$worktree_root/gcc

if [ -z $1 ]; then
	echo "Usage: $0 <git commit ref> [target]"
	exit 1
fi
ref=$1

if [ -z $2 ]; then
	target="x86_64"
else
	target="$2"
fi

case "$target" in
	i686)
		config="--enable-sanitizers --enable-clocale=gnu --with-system-zlib --enable-shared --enable-cet --with-demangler-in-ld --enable-libmpx i686-linux --with-fpmath=sse --disable-bootstrap"
		runtest=true
		;;
	ubsan)
		config="--with-build-config=bootstrap-ubsan --enable-languages=c,c++,fortran,lto --disable-multilib --enable-shared"
		runtest=false
		;;
	*)
		config="--enable-bootstrap --enable-languages=c,c++,fortran,lto --enable-sanitizers"
		runtest=true
		;;
esac

pushd $gcc_root

worktree_path=$worktree_root/$ref-$target

git worktree unlock $worktree_path
git worktree prune
git branch -D $ref-$target
rm -rf $worktree_path
git worktree add -b $ref-$target $worktree_path $ref
pushd $worktree_path
mkdir build && cd build
../configure $config && \
	make -j$(nproc) > /dev/null && $runtest && \
	make -j$(nproc) check > $worktree_root/check-$ref-$target.out 2>&1
popd # $worktree_path
popd # $gcc_root