openexr: 2.4.1 -> 2.5.2

Needed to apply patch to fix pkg-config files so also removed patch that is unused since the switch to CMake during patches refactoring.

pkgs/development/libraries/ilmbase/cross.patch

@@ -1,35 +0,0 @@
-From: Helmut Grohne <>
-Subject: compile build tools with the build architecture compiler
-
-Patch-Source: https://github.com/openexr/openexr/issues/221
-
-Index: ilmbase-2.2.0/configure.ac
-===================================================================
---- ilmbase-2.2.0.orig/configure.ac
-+++ ilmbase-2.2.0/configure.ac
-@@ -28,6 +28,7 @@
- AC_PROG_LN_S
- AC_PROG_LIBTOOL
- AC_PROG_MAKE_SET
-+AX_PROG_CXX_FOR_BUILD
- 
- dnl
- dnl PKGCONFIG preparations
-Index: ilmbase-2.2.0/Half/Makefile.am
-===================================================================
---- ilmbase-2.2.0.orig/Half/Makefile.am
-+++ ilmbase-2.2.0/Half/Makefile.am
-@@ -17,9 +17,11 @@
- 
- CLEANFILES = eLut eLut.h toFloat toFloat.h
- 
--eLut_SOURCES = eLut.cpp
-+eLut$(EXEEXT): eLut.cpp
-+	$(CXX_FOR_BUILD) $(CXXFLAGS_FOR_BUILD) $< -o $@
- 
--toFloat_SOURCES = toFloat.cpp
-+toFloat$(EXEEXT): toFloat.cpp
-+	$(CXX_FOR_BUILD) $(CXXFLAGS_FOR_BUILD) $< -o $@
- 
- eLut.h:	eLut
- 	./eLut > eLut.h

pkgs/development/libraries/ilmbase/default.nix

@@ -12,26 +12,23 @@ stdenv.mkDerivation rec {
 
   # the project no longer provides separate tarballs. We may even want to merge
   # the ilmbase package into openexr in the future.
-  src = openexr.src;
-
-  sourceRoot = "source/IlmBase";
+  inherit (openexr) src patches;
 
   outputs = [ "out" "dev" ];
 
   nativeBuildInputs = [ cmake libtool ];
   depsBuildBuild = [ buildPackages.stdenv.cc ];
 
-  patches = [
-    ./cross.patch
-  ] ++ lib.optionals (stdenv.hostPlatform.isLinux && stdenv.hostPlatform.libc != "glibc") [
-    openexr.non_glibc_fpstate_patch # see description of this patch in `openexr`
-  ];
-
   # fails 1 out of 1 tests with
   # "lt-ImathTest: testBoxAlgo.cpp:892: void {anonymous}::boxMatrixTransform(): Assertion `b21 == b2' failed"
   # at least on i686. spooky!
   doCheck = stdenv.isx86_64;
 
+  preConfigure = ''
+    # Need to cd after patches for openexr patches to apply.
+    cd IlmBase
+  '';
+
   meta = with stdenv.lib; {
     description = " A library for 2D/3D vectors and matrices and other mathematical objects, functions and data types for computer graphics";
     homepage = "https://www.openexr.com/";