From 670c2b80ab38676ffd92ff3ac1981b00505f392f Mon Sep 17 00:00:00 2001
From: Kristofer Peterson <svenski123@users.noreply.github.com>
Date: Mon, 4 Sep 2023 21:25:33 +0200
Subject: [PATCH] Add freebsd/amd64 platform (FreeBSD 13.2-RELEASE-p2 GENERIC
 amd64)

---
 build.sh | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/build.sh b/build.sh
index b5ce7432a2a29..ff3c2bf51a5d3 100755
--- a/build.sh
+++ b/build.sh
@@ -9,6 +9,7 @@ fi
 
 unameOut="$(uname -s)-$(uname -m)"
 case "${unameOut}" in
+    FreeBSD-amd64*) HOST_TRIPLE=x86_64-unknown-freebsd;;
     Linux-x86_64*)  HOST_TRIPLE=x86_64-unknown-linux-gnu;;
     Linux-aarch64*) HOST_TRIPLE=aarch64-unknown-linux-gnu;;
     Darwin-x86_64*) HOST_TRIPLE=x86_64-apple-darwin;;
@@ -17,6 +18,24 @@ case "${unameOut}" in
     *)              HOST_TRIPLE=x86_64-unknown-linux-gnu
 esac
 
+if [[ "${HOST_TRIPLE}" == *-freebsd ]]; then
+    if [[ "$(swig -swiglib)" == */4.1.* ]]; then
+	# Default swig 4.1.2 on FreeBSD 13.x doesn't work due to
+	# broken %nothreadallow / %clearnothreadallow directives
+	# Use swig40 instead
+	fgrep -wq 'SWIG_EXECUTABLE' config.toml ||
+	ed config.toml <<-'EOF'
+	/^\[llvm\]/a
+
+	# Custom CMake defines to set when building LLVM.
+	build-config = { SWIG_EXECUTABLE = '/usr/local/bin/swig40' }
+	.
+	+1,$g/^ *build-config *=/d
+	w
+	EOF
+    fi
+fi
+
 if [ "$1" == "--llvm" ]; then
     rm -f build/${HOST_TRIPLE}/llvm/llvm-finished-building;
 fi