mdadm: Make 4.0 the default

4.0 has been out for a year without another upstream release, so
presumably 4.x's quite stable enough (and already in Arch & Debian
Buster for instance).

pkgs/os-specific/linux/mdadm/4.nix

···
-{ stdenv
-, fetchurl, groff
-, buildPlatform, hostPlatform
-}:
-
-assert stdenv.isLinux;
-
-stdenv.mkDerivation rec {
-  name = "mdadm-4.0";
-
-  src = fetchurl {
-    url = "mirror://kernel/linux/utils/raid/mdadm/${name}.tar.xz";
-    sha256 = "1ad3mma641946wn5lsllwf0lifw9lps34fv1nnkhyfpd9krffshx";
-  };
-
-  # This is to avoid self-references, which causes the initrd to explode
-  # in size and in turn prevents mdraid systems from booting.
-  allowedReferences = [ stdenv.glibc.out ];
-
-  patches = [ ./no-self-references.patch ];
-
-  makeFlags = [
-    "NIXOS=1" "INSTALL=install" "INSTALL_BINDIR=$(out)/sbin"
-    "MANDIR=$(out)/share/man" "RUN_DIR=/dev/.mdadm"
-    "STRIP="
-  ] ++ stdenv.lib.optionals (hostPlatform != buildPlatform) [
-    "CROSS_COMPILE=${stdenv.cc.targetPrefix}"
-  ];
-
-  nativeBuildInputs = [ groff ];
-
-  preConfigure = ''
-    sed -e 's@/lib/udev@''${out}/lib/udev@' \
-        -e 's@ -Werror @ @' \
-        -e 's@/usr/sbin/sendmail@/run/wrappers/bin/sendmail@' -i Makefile
-  '';
-
-  meta = {
-    description = "Programs for managing RAID arrays under Linux";
-    homepage = http://neil.brown.name/blog/mdadm;
-    platforms = stdenv.lib.platforms.linux;
-  };
-}

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

···
 assert stdenv.isLinux;
 
 stdenv.mkDerivation rec {
-  name = "mdadm-3.3.4";
+  name = "mdadm-4.0";
 
   src = fetchurl {
     url = "mirror://kernel/linux/utils/raid/mdadm/${name}.tar.xz";
-    sha256 = "0s6a4bq7v7zxiqzv6wn06fv9f6g502dp047lj471jwxq0r9z9rca";
+    sha256 = "1ad3mma641946wn5lsllwf0lifw9lps34fv1nnkhyfpd9krffshx";
   };
 
   # This is to avoid self-references, which causes the initrd to explode
···
   ];
 
   nativeBuildInputs = [ groff ];
-
-  # Attempt removing if building with gcc5 when updating
-  NIX_CFLAGS_COMPILE = "-std=gnu89";
 
   preConfigure = ''
     sed -e 's@/lib/udev@''${out}/lib/udev@' \

pkgs/top-level/all-packages.nix

···
 
   mbpfan = callPackage ../os-specific/linux/mbpfan { };
 
-  mdadm = callPackage ../os-specific/linux/mdadm { };
-  mdadm4 = callPackage ../os-specific/linux/mdadm/4.nix { };
+  mdadm = mdadm4;
+  mdadm4 = callPackage ../os-specific/linux/mdadm { };
 
   mingetty = callPackage ../os-specific/linux/mingetty { };