migrate to gir v0.15

The upstream of gtk-rs/gir got changes which loses backward
compatibility. This commit follows to it so that:

 * Rust language v1.57 or later (edition 2021)
 * glib/gobject crate v0.15

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

6 files changed, 19 insertions, 37 deletions

diff --git a/Makefile b/Makefile
deleted file mode 100644
index 11c7952..0000000
--- a/Makefile
+++ /dev/null
@@ -1,34 +0,0 @@
-#!/usr/bin/make -f
-
-GIR_EXEC = gir/target/release/gir
-
-.PHONY: all clean test
-
-all: hinawa-sys hinawa
-
-clean:
-	rm -rf gir-files/Hinawa-3.0.gir
-	rm -rf hinawa-sys
-	rm -rf hinawa/src/auto hinawa/target hinawa/Cargo.lock
-
-gir/Cargo.toml:
-	git submodule update --init gir
-
-$(GIR_EXEC): gir/Cargo.toml
-	cd gir && cargo build --release
-
-gir-files/GLib-2.0.toml:
-	git submodule update --init gir-files
-
-gir-files/Hinawa-3.0.gir: Hinawa-3.0.gir gir-files/GLib-2.0.toml
-	cp Hinawa-3.0.gir gir-files/Hinawa-3.0.gir
-
-hinawa-sys/src: conf/gir-hinawa-sys.toml gir-files/Hinawa-3.0.gir $(GIR_EXEC)
-	$(GIR_EXEC) -c conf/gir-hinawa-sys.toml -d gir-files -m sys -o hinawa-sys
-
-hinawa-sys: hinawa-sys/src
-
-hinawa/src/auto: conf/gir-hinawa.toml gir-files/Hinawa-3.0.gir $(GIR_EXEC)
-	$(GIR_EXEC) -c conf/gir-hinawa.toml -d gir-files -m normal -o hinawa
-
-hinawa: hinawa-sys hinawa/src/auto
diff --git a/README.rst b/README.rst
index 2f9d544..6ae2c7d 100644
--- a/README.rst
+++ b/README.rst
@@ -2,15 +2,15 @@
 hinawa Rust bindings
 ====================
 
-2021/11/17
+2022/03/17
 Takashi Sakamoto
 
 Introduction
 ============
 
-* This repository includes FFI and API bindings for ``libhinawa 2`` which provides ``Hinawa-3.0.gir``.
+* This repository includes FFI and API bindings for ``libhinawa2`` which provides ``Hinawa-3.0.gir``.
 
-  * https://github.com/alsa-project/libhinawa
+  * `<https://github.com/alsa-project/libhinawa>`_
 
 * Unfortunately, it includes no support for ``libhinawa 1`` or former (``Hinawa-2.0.gir`` or ``Hinawa-1.0.gir``).
 
@@ -19,6 +19,12 @@ License
 
 MIT License
 
+Dependencies
+============
+
+* Rust version 1.57 or later (edition 2021)
+* `libhinawa <https://github.com/alsa-project/libhinawa>`_
+
 Sample code
 ===========
 
@@ -57,3 +63,12 @@ Read 1 quadlet from address ``0xfffff0000404`` on the node represented as ``/dev
         cntr.quit();
         th.join().unwrap();
     }
+
+How to generate FFI and API crates
+==================================
+
+::
+
+    $ ./generator.py
+
+end
diff --git a/generate.py b/generate.py
new file mode 120000
index 0000000..09c770c
--- /dev/null
+++ b/generate.py
@@ -0,0 +1 @@
+gir/generator.py
\ No newline at end of file
diff --git a/gir b/gir
-Subproject a6737c72ae70ee7a17ae4ac7729905f9bb87e4e
+Subproject 78e3d3c223436bd056b312fe54d845eea8d29f2
diff --git a/gir-files b/gir-files
-Subproject c31e734527636b4ace7972e1c61f8da17cc4f67
+Subproject 5ca60543e148201f01474866273c35a2c79fc6d
diff --git a/conf/gir-hinawa-sys.toml b/hinawa-sys/Gir.toml
index 8364af6..8364af6 100644
--- a/conf/gir-hinawa-sys.toml
+++ b/hinawa-sys/Gir.toml