# Copyright (c) 2024-2025 Epic Games, Inc. All Rights Reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

# 1. Redistributions of source code must retain the above copyright

# notice, this list of conditions and the following disclaimer.

# 2. Redistributions in binary form must reproduce the above copyright

# notice, this list of conditions and the following disclaimer in the

# documentation and/or other materials provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY EPIC GAMES, INC. ``AS IS AND ANY

# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EPIC GAMES, INC. OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

case `uname -s` in

Linux)

MAKE=make

CCPREFIX=""

OS=linux

;;

*)

echo "Unsupported OS"

exit 1

;;

esac

case `uname -m` in

amd64|x86_64)

ARCH=x86_64

LLVMARCH=X86

;;

arm64|aarch64)

ARCH=aarch64

LLVMARCH=AArch64

;;

*)

echo "Unsupported arch"

exit 1

;;

esac

case $OS in

linux)

NCPU=`nproc`

;;

*)

NCPU=`sysctl -n hw.ncpu`

;;

esac

extract_source()

{

rm -rf extracted-source

git archive --format=tar HEAD --prefix=extracted-source/ | tar -xf -

git diff --relative HEAD . | (cd extracted-source && patch -p1)

cd extracted-source

}