Add 'compiler/rustc_codegen_gcc/' from commit 'afae271d5d'

git-subtree-dir: compiler/rustc_codegen_gcc
git-subtree-mainline: ae90dcf020
git-subtree-split: afae271d5d

compiler/rustc_codegen_gcc/build.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+#set -x
+set -e
+
+export GCC_PATH=$(cat gcc_path)
+
+export LD_LIBRARY_PATH="$GCC_PATH"
+export LIBRARY_PATH="$GCC_PATH"
+
+if [[ "$1" == "--release" ]]; then
+    export CHANNEL='release'
+    CARGO_INCREMENTAL=1 cargo rustc --release
+else
+    echo $LD_LIBRARY_PATH
+    export CHANNEL='debug'
+    cargo rustc
+fi
+
+source config.sh
+
+rm -r target/out || true
+mkdir -p target/out/gccjit
+
+echo "[BUILD] sysroot"
+time ./build_sysroot/build_sysroot.sh $CHANNEL