kmod: build devdoc

Switch from autoreconfHook to running autogen.sh ourselves so that
gtkdocize gets run.  The GTK_DOC_CHECK autoconf macro isn't
cross-friendly, so we have to disable it when cross-compiling.

pkgs/os-specific/linux/kmod/default.nix

@@ -1,5 +1,7 @@
-{ stdenv, lib, fetchurl, autoreconfHook, pkg-config
+{ stdenv, lib, fetchzip, autoconf, automake, docbook_xml_dtd_42
+, docbook_xml_dtd_43, docbook_xsl, gtk-doc, libtool, pkg-config
 , libxslt, xz, zstd, elf-header
+, withDevdoc ? stdenv.hostPlatform == stdenv.buildPlatform
 , withStatic ? stdenv.hostPlatform.isStatic
 }:
 
@@ -11,21 +13,35 @@ in stdenv.mkDerivation rec {
   pname = "kmod";
   version = "29";
 
-  src = fetchurl {
-    url = "mirror://kernel/linux/utils/kernel/${pname}/${pname}-${version}.tar.xz";
-    sha256 = "0am54mi5rk72g5q7k6l6f36gw3r9vwgjmyna43ywcjhqmakyx00b";
+  # autogen.sh is missing from the release tarball,
+  # and we need to run it to regenerate gtk_doc.make,
+  # because the version in the release tarball is broken.
+  # Possibly this will be fixed in kmod 30?
+  # https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git/commit/.gitignore?id=61a93a043aa52ad62a11ba940d4ba93cb3254e78
+  src = fetchzip {
+    url = "https://git.kernel.org/pub/scm/utils/kernel/kmod/kmod.git/snapshot/kmod-${version}.tar.gz";
+    sha256 = "sha256-7O5VdBd8rBZdIERPE+2zkjj5POvSurwlV2EpWmkFUD0=";
   };
 
-  outputs = [ "out" "dev" "lib" ];
+  outputs = [ "out" "dev" "lib" ] ++ lib.optional withDevdoc "devdoc";
 
-  nativeBuildInputs = [ autoreconfHook pkg-config libxslt ];
+  nativeBuildInputs = [
+    autoconf automake docbook_xsl libtool libxslt pkg-config
+
+    docbook_xml_dtd_42 # for the man pages
+  ] ++ lib.optionals withDevdoc [ docbook_xml_dtd_43 gtk-doc ];
   buildInputs = [ xz zstd ] ++ lib.optional stdenv.isDarwin elf-header;
 
+  preConfigure = ''
+    ./autogen.sh
+  '';
+
   configureFlags = [
     "--sysconfdir=/etc"
     "--with-xz"
     "--with-zstd"
     "--with-modulesdirs=${modulesDirs}"
+    (lib.enableFeature withDevdoc "gtk-doc")
   ] ++ lib.optional withStatic "--enable-static";
 
   patches = [ ./module-dir.patch ]