gnu: Add rust-glib-macros-0.19.

* gnu/packages/crates-gtk.scm (rust-glib-macros-0.19): New variable.
(rust-glib-macros-0.18): Inherit from rust-glib-macros-0.19.

Change-Id: I8dcf545632581ac11550b69a0f169f3fb34a4572

gnu/packages/crates-gtk.scm

@@ -1796,8 +1796,37 @@
        #:cargo-development-inputs
        (("rust-tempfile" ,rust-tempfile-3))))))
 
+(define-public rust-glib-macros-0.19
+  (package
+    (name "rust-glib-macros")
+    (version "0.19.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "glib-macros" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1mzsh8jkg8vldvgvr9gsaidvn2myn5cbdn8a6m8rgbhlg8kv0aa4"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs (("rust-heck" ,rust-heck-0.5)
+                       ("rust-proc-macro-crate" ,rust-proc-macro-crate-3)
+                       ("rust-proc-macro2" ,rust-proc-macro2-1)
+                       ("rust-quote" ,rust-quote-1)
+                       ("rust-syn" ,rust-syn-2))
+       #:cargo-development-inputs (("rust-glib" ,rust-glib-0.19)
+                                   ("rust-trybuild2" ,rust-trybuild2-1))))
+    (native-inputs (list pkg-config))
+    (inputs (list glib))
+    (home-page "https://gtk-rs.org/")
+    (synopsis "Rust bindings for the GLib library, proc macros crate")
+    (description
+     "This package provides Rust bindings for the GLib library, proc macros crate.")
+    (license license:expat)))
+
 (define-public rust-glib-macros-0.18
   (package
+    (inherit rust-glib-macros-0.19)
     (name "rust-glib-macros")
     (version "0.18.5")
     (source
@@ -1807,7 +1836,6 @@
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
         (base32 "1p5cla53fcp195zp0hkqpmnn7iwmkdswhy7xh34002bw8y7j5c0b"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:cargo-inputs
        (("rust-heck" ,rust-heck-0.4)
@@ -1819,13 +1847,7 @@
        #:cargo-development-inputs
        (("rust-glib" ,rust-glib-0.18)
         ("rust-once-cell" ,rust-once-cell-1)
-        ("rust-trybuild2" ,rust-trybuild2-1))))
+        ("rust-trybuild2" ,rust-trybuild2-1))))))
-    (native-inputs (list pkg-config))
-    (inputs (list glib))
-    (home-page "https://gtk-rs.org/")
-    (synopsis "Rust bindings for the GLib library, proc macros crate")
-    (description "Rust bindings for the GLib library, proc macros crate.")
-    (license license:expat)))
 
 (define-public rust-glib-macros-0.17
   (package