Add ENABLE_FTS4 package trait (#78)

Author: sbooth

Package.swift

@@ -76,6 +76,8 @@ let features: [CSetting] = [
 	.define("SQLITE_ENABLE_DBPAGE_VTAB", .when(traits: ["ENABLE_DBPAGE_VTAB"])),
 	// https://sqlite.org/dbstat.html
 	.define("SQLITE_ENABLE_DBSTAT_VTAB", .when(traits: ["ENABLE_DBSTAT_VTAB"])),
+	// https://sqlite.org/fts3.html
+	.define("SQLITE_ENABLE_FTS4", .when(traits: ["ENABLE_FTS4"])),
 	// https://sqlite.org/fts5.html
 	.define("SQLITE_ENABLE_FTS5", .when(traits: ["ENABLE_FTS5"])),
 	// https://sqlite.org/geopoly.html
@@ -200,6 +202,10 @@ let package = Package(
 			name: "ENABLE_DBSTAT_VTAB",
 			description: "Enables the dbstat virtual table"
 		),
+		.trait(
+			name: "ENABLE_FTS4",
+			description: "Enables versions 3 and 4 of the full-text search engine (fts3 and fts4)"
+		),
 		.trait(
 			name: "ENABLE_FTS5",
 			description: "Enables version 5 of the full-text search engine (fts5)"

README.md

@@ -66,6 +66,7 @@ The following traits enable commonly-used SQLite features:
 | ENABLE_COLUMN_METADATA | | [SQLITE_ENABLE_COLUMN_METADATA](https://sqlite.org/c3ref/column_database_name.html) |
 | ENABLE_DBPAGE_VTAB | | [SQLITE_ENABLE_DBPAGE_VTAB](https://sqlite.org/dbpage.html) |
 | ENABLE_DBSTAT_VTAB | | [SQLITE_ENABLE_DBSTAT_VTAB](https://sqlite.org/dbstat.html) |
+| ENABLE_FTS4 | | [SQLITE_ENABLE_FTS4](https://sqlite.org/fts3.html) |
 | ENABLE_FTS5 | Y | [SQLITE_ENABLE_FTS5](https://sqlite.org/fts5.html) |
 | ENABLE_GEOPOLY | | [SQLITE_ENABLE_GEOPOLY](https://sqlite.org/geopoly.html) |
 | ENABLE_MATH_FUNCTIONS | Y | [SQLITE_ENABLE_MATH_FUNCTIONS](https://sqlite.org/lang_mathfunc.html) |