From 2685f2cae0141361a780fbf7826a00b4d6284cc8 Mon Sep 17 00:00:00 2001
From: Marcin Kolny <mkolny@amazon.com>
Date: Wed, 30 Jul 2025 04:25:52 +0200
Subject: [PATCH] Use venv to install llvm dependencies and run build script
 (#4514)

Installing pip packages system-wide is no longer recommended, therefore
we create virtual environment for setting up the build environment for LLVM.
---
 wamr-compiler/build_llvm.sh        | 14 +++++++++++++-
 wamr-compiler/build_llvm_arc.sh    |  4 ++--
 wamr-compiler/build_llvm_xtensa.sh |  4 ++--
 3 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/wamr-compiler/build_llvm.sh b/wamr-compiler/build_llvm.sh
index c3ec54b61..75285b52c 100755
--- a/wamr-compiler/build_llvm.sh
+++ b/wamr-compiler/build_llvm.sh
@@ -3,5 +3,17 @@
 # Copyright (C) 2020 Intel Corporation. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-/usr/bin/env python3 -m pip install --user -r ../build-scripts/requirements.txt
+TEMP_DIR=$(mktemp -d)
+
+cleanup() {
+    local exit_code=$?
+    rm -rf "$TEMP_DIR"
+    exit $exit_code
+}
+
+trap cleanup EXIT INT TERM
+
+/usr/bin/env python3 -m venv --clear "$TEMP_DIR"
+source "$TEMP_DIR/bin/activate"
+/usr/bin/env python3 -m pip install -r ../build-scripts/requirements.txt
 /usr/bin/env python3 ../build-scripts/build_llvm.py "$@"
diff --git a/wamr-compiler/build_llvm_arc.sh b/wamr-compiler/build_llvm_arc.sh
index d148e11ec..bc10216e1 100755
--- a/wamr-compiler/build_llvm_arc.sh
+++ b/wamr-compiler/build_llvm_arc.sh
@@ -3,5 +3,5 @@
 # Copyright (C) 2020 Intel Corporation. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-/usr/bin/env python3 -m pip install --user -r ../build-scripts/requirements.txt
-/usr/bin/env python3 ../build-scripts/build_llvm.py --platform arc "$@"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+$SCRIPT_DIR/build_llvm.sh --platform arc "$@"
diff --git a/wamr-compiler/build_llvm_xtensa.sh b/wamr-compiler/build_llvm_xtensa.sh
index 183ea379f..29559ce35 100755
--- a/wamr-compiler/build_llvm_xtensa.sh
+++ b/wamr-compiler/build_llvm_xtensa.sh
@@ -3,5 +3,5 @@
 # Copyright (C) 2020 Intel Corporation. All rights reserved.
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 
-/usr/bin/env python3 -m pip install --user -r ../build-scripts/requirements.txt
-/usr/bin/env python3 ../build-scripts/build_llvm.py --platform xtensa "$@"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+$SCRIPT_DIR/build_llvm.sh --platform xtensa "$@"