clang

unvendor

06/build-using-nix.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+# this is entirely optional and for development purposes only
+# just use `nix-build` and you should be fine
+
+# build with ccache and without /bin/sh present
+# your nix needs experimental-options = ca-derivations
+# and you need root access / to be a trusted user
+
+set -ue
+
+CCACHE_HOST=/var/cache/ccache
+mkdir -p $CCACHE_HOST/data
+sudo chgrp nixbld $CCACHE_HOST $CCACHE_HOST/data
+sudo chmod g+ws $CCACHE_HOST $CCACHE_HOST/data
+
+if [[ ! -e $CCACHE_HOST/bin/ccache ]]; then
+	nix build 'nixpkgs#pkgsStatic.ccache' --out-link $CCACHE_HOST/result
+	mkdir -p $CCACHE_HOST/bin
+	cp --reflink=auto $CCACHE_HOST/result/bin/ccache $CCACHE_HOST/bin/ccache
+	rm $CCACHE_HOST/result
+fi
+
+[[ -e $CCACHE_HOST/setup ]] || cat > $CCACHE_HOST/setup <<\EOF
+mkdir -p .ccache-wrappers
+for prefix in '' x86_64-linux- x86_64-linux-musl- x86_64-linux-unknown-; do
+	for name in cc c++ gcc g++ clang clang++ tcc; do
+		if command -v $prefix$name; then
+			ln -s /ccache/bin/ccache .ccache-wrappers/$prefix$name
+		fi
+	done
+done
+export PATH="$(pwd)/.ccache-wrappers:/ccache/bin:$PATH"
+export CCACHE_DIR="/ccache/data/$1"
+export CCACHE_COMPILERCHECK=content
+export CCACHE_SLOPPINESS=include_file_ctime,include_file_mtime
+export CCACHE_MAXSIZE=0
+export CCACHE_UMASK=005
+export CCACHE_NOHASHDIR=1
+export CCACHE_BASEDIR="$(pwd)"
+EOF
+chmod +x $CCACHE_HOST/setup
+
+nix-build -A stage1.protomusl
+nix-build -A stage1.protobusybox
+nix-build -A stage1.tinycc
+sudo env "NIX_CONFIG=sandbox-paths = /ccache=$CCACHE_HOST" nix-build "$@"