allow postgresql cross compiling

pkgs/development/libraries/libossp-uuid/default.nix

@@ -1,4 +1,4 @@
-{stdenv, fetchurl}:
+{stdenv, fetchurl, buildPackages}:
 
 let version = "1.6.2"; in
 
@@ -12,6 +12,12 @@ stdenv.mkDerivation {
 
   configureFlags = stdenv.lib.optional stdenv.isFreeBSD "--with-pic";
 
+  patches = [ ./shtool.patch ];
+
+  preConfigure = ''
+  export ac_cv_va_copy=yes
+  '';
+
   meta = with stdenv.lib; {
     homepage = http://www.ossp.org/pkg/lib/uuid/;
     description = "OSSP uuid ISO-C and C++ shared library";

pkgs/development/libraries/libossp-uuid/shtool.patch

@@ -0,0 +1,11 @@
+--- a/shtool	2008-07-05 05:43:08.000000000 +0800
++++ b/shtool	2018-07-25 15:45:40.559587471 +0800
+@@ -1400,7 +1400,7 @@
+             if [ ".$opt_t" = .yes ]; then
+                 echo "strip $dsttmp" 1>&2
+             fi
+-            strip $dsttmp || shtool_exit $?
++            $STRIP $dsttmp || shtool_exit $?
+         fi
+         if [ ".$opt_o" != . ]; then
+             if [ ".$opt_t" = .yes ]; then

pkgs/servers/sql/postgresql/default.nix

@@ -1,4 +1,4 @@
-{ lib, stdenv, glibc, fetchurl, zlib, readline, libossp_uuid, openssl, libxml2, makeWrapper }:
+{ lib, stdenv, glibc, fetchurl, zlib, readline, libossp_uuid, openssl, libxml2, makeWrapper, tzdata, symlinkJoin }:
 
 let
 
@@ -14,8 +14,15 @@ let
     outputs = [ "out" "lib" "doc" "man" ];
     setOutputFlags = false; # $out retains configureFlags :-/
 
+    combinedLibXML2 = symlinkJoin {
+      name = "libxml2-combined";
+      paths = [ libxml2 libxml2.dev ];
+    };
+
+    nativeBuildInputs = [ combinedLibXML2 ];
+
     buildInputs =
-      [ zlib readline openssl libxml2 makeWrapper ]
+      [ zlib readline openssl makeWrapper ]
       ++ lib.optionals (!stdenv.isDarwin) [ libossp_uuid ];
 
     enableParallelBuilding = true;
@@ -28,8 +35,9 @@ let
       "--sysconfdir=/etc"
       "--libdir=$(lib)/lib"
     ]
-      ++ lib.optional (stdenv.isDarwin)  "--with-uuid=e2fs"
-      ++ lib.optional (!stdenv.isDarwin) "--with-ossp-uuid";
+      ++ lib.optional stdenv.isDarwin  "--with-uuid=e2fs"
+      ++ lib.optional (!stdenv.isDarwin) "--with-ossp-uuid"
+      ++ lib.optional stdenv.isCross "--with-system-tzdata=${tzdata}";
 
     patches =
       [ (if atLeast "9.4" then ./disable-resolve_symlinks-94.patch else ./disable-resolve_symlinks.patch)