Swift Package

Added Package.swift file that will allow to integrate flite library using Swift Package Manager.
It is the very first step to interate flite to Apple's Voice Over.

.gitignore

@@ -7,3 +7,5 @@ config.status
 include/flite_version.h
 main/flite_lang_list.c
 main/flite_voice_list.c
+.swiftpm
+.build

Package.swift

@@ -0,0 +1,100 @@
+// swift-tools-version: 5.4
+
+import Foundation
+import PackageDescription
+
+let package = Package(
+    name: "flite",
+    products: [
+        .library(
+            name: "flite",
+            targets: ["flite"])
+    ],
+    dependencies: [
+    ],
+    targets: [
+        .target(
+            name: "flite",
+            dependencies: [
+            ],
+            path:"",
+            exclude:[
+                // Next files designed for specific OS and can't be built on Apple platforms
+                "src/audio/au_pulseaudio.c",
+                "src/audio/au_win.c",
+                "src/audio/au_alsa.c",
+                "src/audio/au_oss.c",
+                "src/audio/au_wince.c",
+                "src/audio/au_command.c",
+                "src/audio/au_palmos.c",
+                "src/audio/au_sun.c",
+
+                "src/utils/cst_file_wince.c",
+                "src/utils/cst_file_palmos.c",
+                "src/utils/cst_mmap_none.c",
+                "src/utils/cst_file_wince.c",
+                "src/utils/cst_mmap_win32.c",
+
+                "lang/cmu_us_rms/cmu_us_rms_voice.cpp",
+                "lang/cmulex/cmu_lex_num_bytes.c",
+                "lang/cmulex/cmu_lex_phones_huff_table.c",
+                "lang/cmulex/cmu_lex_entries_huff_table.c",
+                "lang/cmulex/cmu_lex_data_raw.c",
+                // Makefiles shoundn't be "build"
+                "src/Makefile",
+                "src/cg/Makefile",
+                "src/hrg/Makefile",
+                "src/lexicon/Makefile",
+                "src/regex/Makefile",
+                "src/speech/Makefile",
+                "src/stats/Makefile",
+                "src/synth/Makefile",
+                "src/utils/Makefile",
+                "src/wavesynth/Makefile",
+                "lang/cmu_indic_lang/Makefile",
+                "lang/cmu_indic_lex/Makefile",
+                "lang/cmu_time_awb/Makefile",
+                "lang/cmu_us_awb/Makefile",
+                "lang/cmu_us_kal/Makefile",
+                "lang/cmu_us_kal16/Makefile",
+                "lang/cmu_us_rms/Makefile",
+                "lang/cmu_us_slt/Makefile",
+                "lang/cmulex/Makefile",
+                "src/audio/Makefile",
+                "lang/usenglish/Makefile",
+                "lang/cmulex/make_cmulex",
+                "lang/usenglish/make_us_regexes",
+                "lang/usenglish/us_pos.tree",
+                // vcproj - Windows visual studio files
+                "lang/cmulex/libflite-cmulex.vcproj",
+                "lang/cmu_us_rms/cmu_us_rms.vcproj",
+                "lang/usenglish/libflite-usenglish.vcproj"
+            ],
+            sources:[
+                // Main sources
+                "src",
+                // Voices sourses
+                "lang/cmu_us_slt/",
+                "lang/cmu_us_awb/",
+                "lang/cmu_indic_lang/",
+                "lang/cmu_indic_lex/",
+                "lang/cmu_time_awb/",
+                "lang/cmu_us_awb/",
+                "lang/cmu_us_kal/",
+                "lang/cmu_us_kal16/",
+                "lang/cmu_us_rms/",
+                "lang/usenglish/",
+                "lang/cmulex/"
+            ],
+            publicHeadersPath:"include/",
+            cSettings: [
+                .headerSearchPath("include/**"),
+                .headerSearchPath("lang/**"),
+                .headerSearchPath("lang/usenglish/"),
+                .headerSearchPath("lang/cmulex/"),
+            ]
+        )
+    ],
+    cLanguageStandard: .c17,
+    cxxLanguageStandard: .cxx17
+)