Merge staging into closure-size

The most complex problems were from dealing with switches reverted in
the meantime (gcc5, gmp6, ncurses6).
It's likely that darwin is (still) broken nontrivially.

pkgs/misc/cups/drivers/mfcj470dw/default.nix

@@ -0,0 +1,50 @@
+{ stdenv, fetchurl, cups, dpkg, ghostscript, patchelf, bash, file }:
+
+stdenv.mkDerivation rec {
+  name = "mfcj470dw-cupswrapper-${version}";
+  version = "3.0.0-1";
+
+  srcs =
+    [ (fetchurl {
+        url = "http://download.brother.com/welcome/dlf006843/mfcj470dwlpr-${version}.i386.deb";
+        sha256 = "7202dd895d38d50bb767080f2995ed350eed99bc2b7871452c3c915c8eefc30a";
+      })
+      (fetchurl {
+        url = "http://download.brother.com/welcome/dlf006845/mfcj470dwcupswrapper-${version}.i386.deb";
+        sha256 = "92af9024e821159eccd78a8925fc77fb92b4f247f2d2c824ca303004077076a7";
+      })
+    ];
+
+  buildInputs = [ dpkg cups patchelf bash ];
+
+  unpackPhase = "true";
+
+  installPhase = ''
+    for s in $srcs; do dpkg-deb -x $s $out; done
+
+    substituteInPlace $out/opt/brother/Printers/mfcj470dw/cupswrapper/cupswrappermfcj470dw \
+      --replace /opt "$out/opt" \
+      --replace /usr "$out/usr" \
+      --replace /etc "$out/etc"
+
+    substituteInPlace $out/opt/brother/Printers/mfcj470dw/lpd/filtermfcj470dw \
+      --replace /opt "$out/opt" \
+      --replace file "/run/current-system/sw/bin/file"
+
+    sed -i '/GHOST_SCRIPT=/c\GHOST_SCRIPT=gs' $out/opt/brother/Printers/mfcj470dw/lpd/psconvertij2
+
+    patchelf --set-interpreter ${stdenv.glibc}/lib/ld-linux.so.2 $out/opt/brother/Printers/mfcj470dw/lpd/brmfcj470dwfilter
+    patchelf --set-interpreter ${stdenv.glibc}/lib/ld-linux.so.2 $out/opt/brother/Printers/mfcj470dw/cupswrapper/brcupsconfpt1
+
+    mkdir -p $out/lib/cups/filter/
+    ln -s $out/opt/brother/Printers/mfcj470dw/lpd/filtermfcj470dw $out/lib/cups/filter/brother_lpdwrapper_mfcj470dw
+  '';
+
+  meta = {
+    homepage = http://www.brother.com/;
+    description = "A driver for brother mfcj470dw printers to print over WiFi and USB";
+    license = stdenv.lib.licenses.unfree;
+    platforms = stdenv.lib.platforms.linux;
+    downloadPage = http://support.brother.com/g/b/downloadlist.aspx?c=us&lang=en&prod=mfcj470dw_us_eu_as&os=128;
+  };
+}

pkgs/misc/cups/filters.nix

@@ -10,11 +10,14 @@ stdenv.mkDerivation rec {
     sha256 = "07wwlqcykfjfqcwj1bxk60ggahyaw7wcx32n5s104d1qkhham01i";
   };
 
-  patches = [(fetchpatch { # drop on update
-    name = "poppler-0.34.patch";
-    url = "https://bugs.linuxfoundation.org/attachment.cgi?id=493";
-    sha256 = "18za83q0b0n4hpvvw76jsv0hm89zmijvps2z5kg1srickqlxj891";
-  })];
+  patches = [
+    ./longer-shell-path.patch
+    (fetchpatch { # drop on update
+      name = "poppler-0.34.patch";
+      url = "https://bugs.linuxfoundation.org/attachment.cgi?id=493";
+      sha256 = "18za83q0b0n4hpvvw76jsv0hm89zmijvps2z5kg1srickqlxj891";
+    })
+  ];
 
   buildInputs = [
     pkgconfig cups poppler poppler_utils fontconfig libjpeg libpng perl

pkgs/misc/cups/longer-shell-path.patch

@@ -0,0 +1,13 @@
+diff --git a/filter/foomatic-rip/foomaticrip.c b/filter/foomatic-rip/foomaticrip.c
+index 90a851c..689a2bd 100644
+--- a/filter/foomatic-rip/foomaticrip.c
++++ b/filter/foomatic-rip/foomaticrip.c
+@@ -174,7 +174,7 @@ char cupsfilterpath[PATH_MAX] = "/usr/local/lib/cups/filter:"
+                                 "/opt/cups/filter:"
+                                 "/usr/lib/cups/filter";
+
+-char modern_shell[64] = SHELL;
++char modern_shell[] = SHELL;
+
+ void config_set_option(const char *key, const char *value)
+ {