Specify by -D

sqlite3.go

@@ -29,10 +29,6 @@ struct tm* _localtime32(const __time32_t *tm) {
 # define SQLITE_OPEN_FULLMUTEX 0
 #endif
 
-#ifndef SQLITE_THREADSAFE
-# define SQLITE_THREADSAFE
-#endif
-
 static int
 _sqlite3_open_v2(const char *filename, sqlite3 **ppDb, int flags, const char *zVfs) {
 #ifdef SQLITE_OPEN_URI

sqlite3_other.go

@@ -9,6 +9,6 @@ package sqlite3
 /*
 #cgo CFLAGS: -I.
 #cgo linux LDFLAGS: -ldl
-#cgo CFLAGS: -DSQLITE_ENABLE_RTREE
+#cgo CFLAGS: -DSQLITE_ENABLE_RTREE -DSQLITE_THREADSAFE
 */
 import "C"

sqlite3_windows.go

@@ -8,6 +8,6 @@ package sqlite3
 /*
 #cgo CFLAGS: -I. -fno-stack-check -fno-stack-protector -mno-stack-arg-probe
 #cgo LDFLAGS: -lmingwex -lmingw32
-#cgo CFLAGS: -DSQLITE_ENABLE_RTREE
+#cgo CFLAGS: -DSQLITE_ENABLE_RTREE -DSQLITE_THREADSAFE
 */
 import "C"