Squashed 'backend/go-sqlite3/' content from commit 20826e8

git-subtree-dir: backend/go-sqlite3
git-subtree-split: 20826e87d8f061d0a7266562f43950ee06e2e9c0

sqlite3_opt_math_functions.go

@@ -0,0 +1,15 @@
+// Copyright (C) 2022 Yasuhiro Matsumoto <mattn.jp@gmail.com>.
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file.
+
+//go:build sqlite_math_functions
+// +build sqlite_math_functions
+
+package sqlite3
+
+/*
+#cgo CFLAGS: -DSQLITE_ENABLE_MATH_FUNCTIONS
+#cgo LDFLAGS: -lm
+*/
+import "C"