# --- T2-COPYRIGHT-BEGIN ---
# t2/package/*/vlang/new_buildscript.patch
# Copyright (C) 2025 The T2 SDE Project
# SPDX-License-Identifier: GPL-2.0 or patched project license
# --- T2-COPYRIGHT-END ---

diff --git a/build.sh b/build.sh
new file mode 100755
index 000000000..aae8070be
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,215 @@
+#/bin/bash
+set -e
+
+install=0
+force_boostrap=0
+show_help=0
+while [[ $# -gt 0 ]]; do
+    arg="$1"
+
+    key=$(echo $arg | cut -sd'=' -f1)
+    val=$(echo $arg | cut -sd'=' -f2)
+
+    case $arg in
+        help)
+            show_help=1
+            ;;
+        --help)
+            show_help=1
+            ;;
+        -help)
+            show_help=1
+            ;;
+        build)
+            if ! [ -z $val ]; then
+                echo "argument $arg expected no value"
+                exit 1
+            fi
+            # ignore for now
+            ;;
+        install)
+            if ! [ -z $val ]; then
+                echo "argument $arg expected no value"
+                exit 1
+            fi
+            install=1
+            ;;
+        clean)
+            if ! [ -z $val ]; then
+                echo "argument $arg expected no value"
+                exit 1
+            fi
+            # ignore for now
+            ;;
+        force-bootstrap)
+            if ! [ -z $val ]; then
+                echo "argument $arg expected no value"
+                exit 1
+            fi
+            force_boostrap=1
+            ;;
+        *)
+            echo "unknown argument: $arg"
+            ;;
+    esac
+
+    shift # Move to the next argument
+done
+
+if ((show_help)); then
+    echo "usage: ./build.sh [build|install|clean] (force-bootstrap)"
+    exit 0
+fi
+
+
+test_prog () {
+    echo "$1" > ".check.c"
+    if $CC $2 ".check.c" -o ".check.exe" 2>/dev/null; then
+        echo 1
+    else
+        echo 0
+    fi
+}
+
+check_cc_arg () {
+    test_prog "int main() {return 0;}" $1
+}
+
+check_include () {
+    test_prog "#include <$1>
+    int main() { return 0; }"
+}
+
+
+# ==================================== #
+echo -n "checking for cc: "
+if [ -z $CC ]; then
+    if command -v cc 2>&1 > /dev/null; then
+        CC=$(which cc)
+        echo $CC
+    else
+        echo no
+        echo Please manually set \$CC
+        exit 1
+    fi
+fi
+# ==================================== #
+echo -n "can cc compile simple program: "
+if [ $(test_prog "int main() {return 0;}") = 1 ]; then
+    echo yes
+else
+    echo no
+    echo Please set \$CC to a working C compiler
+    exit 1
+fi
+# ==================================== #
+backtrace=0
+echo -n "checking for backtrace(): "
+if [ $(test_prog "int main() {void* buf[1]; (void) backtrace(buf, 1);}") = 1 ]; then
+    echo yes
+    backtrace=1
+else
+    echo no
+fi
+# ==================================== #
+echo -n "checking for v: "
+have_v=0
+if command -v v 2>&1 > /dev/null; then
+    have_v=1
+    echo yes
+else
+    echo no
+fi
+# ==================================== #
+echo -n "checking for downloader: "
+if command -v wget 2>&1 > /dev/null; then
+    downloader=wget
+    echo wget
+elif command -v curl 2>&1 > /dev/null; then
+    downloader=curl
+    echo curl
+else
+    echo no curl or wget found in path
+    exit 1
+fi
+# ==================================== #
+echo -n "checking for libgc: "
+if [ "$(check_cc_arg "-lgc")" = "1" ]; then
+    echo yes
+else
+    echo no
+    echo please install libgc / gc-boehem
+    exit 1
+fi
+# ==================================== #
+echo -n "checking for bindir: "
+if ! [ -z $BINDIR ]; then
+    echo $BINDIR
+elif [ -d /usr/bin ]; then
+    BINDIR=/usr/bin
+    echo $BINDIR
+else
+    echo could not find bin dir. manually set \$BINDIR
+    exit 1
+fi
+# ==================================== #
+
+
+download () {
+    if [ "$downloader" = "wget" ]; then
+        wget "$2" -O "$1"
+    elif [ "$downloader" = "curl" ]; then
+        curl "$2" -o "$1"
+    fi
+}
+
+
+VFLAGS="-d dynamic_boehm"
+if ((!backtrace)); then
+    VFLAGS+=" -d no_backtrace"
+fi
+
+if ((!have_v)); then
+    force_boostrap=1
+fi
+
+if ((!force_boostrap)); then
+    echo "skipping stage 1 (boostrap) because V in path, and force-bootstrap argument not set"
+    stage1_cmd="v"
+else
+    if [ -f "v.c" ]; then
+        echo "boostrap (v.c) already downloaded, skipping"
+    else
+        echo "download boostrap (v.c)"
+        download "v.c" "https://raw.githubusercontent.com/vlang/vc/f553add34becae265cd107b55d0d0b9907fc1b6d/v.c"
+    fi
+
+    echo "compile stage 1 (boostrap)"
+    $CC v.c -o v1.exe -std=c99 -lpthread -lm -w
+
+    stage1_cmd="./v1.exe"
+fi
+
+echo "compile stage 2"
+"$stage1_cmd" -no-parallel -o v2.exe $VFLAGS -d tools_vflags="$VFLAGS" cmd/v
+
+echo "compile stage 3"
+./v2.exe -nocache -o v3.exe $VFLAGS -d tools_vflags="$VFLAGS" cmd/v
+
+if ((install)); then
+    echo "installing to /opt/vlang"
+    mkdir -p /opt/vlang
+    cp v3.exe "/opt/vlang/v"
+    cp -r vlib "/opt/vlang/"
+    cp -r thirdparty "/opt/vlang/"
+    cp -r doc "/opt/vlang/"
+    cp -r cmd "/opt/vlang/"
+    cp v.mod "/opt/vlang/"
+    cp LICENSE "/opt/vlang/"
+
+    echo "creating symlink"
+    if [ -f "$BINDIR/v" ]; then
+        rm "$BINDIR/v"
+    fi
+    ln -s "/opt/vlang/v" "$BINDIR/v"
+fi