From 0f4be28af526a8421efeb820e529f66d083cb0a2 Mon Sep 17 00:00:00 2001
From: Steve Purcell <steve@sanityinc.com>
Date: Wed, 6 Jan 2021 13:03:51 +1300
Subject: [PATCH]  hdf4: fix build on darwin

The fix here is to not include libtirc on Darwin, on which platform
the library is unavailable.
---
 pkgs/tools/misc/hdf4/default.nix | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/pkgs/tools/misc/hdf4/default.nix b/pkgs/tools/misc/hdf4/default.nix
index a1aff8575279..b5269a15867a 100644
--- a/pkgs/tools/misc/hdf4/default.nix
+++ b/pkgs/tools/misc/hdf4/default.nix
@@ -8,7 +8,8 @@
 , zlib
 , szip ? null
 }:
-
+let uselibtirpc = stdenv.isLinux;
+in
 stdenv.mkDerivation rec {
   pname = "hdf";
   version = "4.2.15";
@@ -49,12 +50,13 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     libjpeg
-    libtirpc
     szip
     zlib
+  ] ++ stdenv.lib.optionals uselibtirpc [
+    libtirpc
   ];
 
-  preConfigure = ''
+  preConfigure = stdenv.lib.optionalString uselibtirpc ''
     # Make tirpc discovery work with CMAKE_PREFIX_PATH
     substituteInPlace config/cmake/FindXDR.cmake \
       --replace 'find_path(XDR_INCLUDE_DIR NAMES rpc/types.h PATHS "/usr/include" "/usr/include/tirpc")' \