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/applications/search/recoll/default.nix

@@ -1,6 +1,6 @@
 { stdenv, fetchurl
-, qt4, xapian, file, python
-, djvulibre, groff, libxslt, unzip, xpdf, antiword, catdoc, lyx
+, qt4, xapian, file, python, perl
+, djvulibre, groff, libxslt, unzip, poppler_utils, antiword, catdoc, lyx
 , libwpd, unrtf, untex
 , ghostscript, gawk, gnugrep, gnused, gnutar, gzip, libiconv }:
 
@@ -34,7 +34,7 @@ stdenv.mkDerivation rec {
       substituteInPlace  $f --replace gunzip        ${gzip}/bin/gunzip
       substituteInPlace  $f --replace iconv         ${libiconv.bin}/bin/iconv
       substituteInPlace  $f --replace lyx           ${lyx}/bin/lyx
-      substituteInPlace  $f --replace pdftotext     ${xpdf}/bin/pdftotext
+      substituteInPlace  $f --replace pdftotext     ${poppler_utils}/bin/pdftotext
       substituteInPlace  $f --replace pstotext      ${ghostscript}/bin/ps2ascii 
       substituteInPlace  $f --replace sed           ${gnused}/bin/sed
       substituteInPlace  $f --replace tar           ${gnutar}/bin/tar
@@ -44,6 +44,7 @@ stdenv.mkDerivation rec {
       substituteInPlace  $f --replace unrtf         ${unrtf}/bin/unrtf
       substituteInPlace  $f --replace untex         ${untex}/bin/untex
       substituteInPlace  $f --replace wpd2html      ${libwpd}/bin/wpd2html
+      substituteInPlace  $f --replace /usr/bin/perl ${perl}/bin/perl
     done
   '';