ilmbase: fix cross

pkgs/development/libraries/ilmbase/cross.patch

@@ -0,0 +1,35 @@
+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

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, automake, autoconf, libtool, which }:
+{ stdenv, fetchurl, buildPackages, automake, autoconf, libtool, which }:
 
 stdenv.mkDerivation rec {
   name = "ilmbase-${version}";
@@ -16,11 +16,12 @@ stdenv.mkDerivation rec {
     ./bootstrap
   '';
 
-  buildInputs = [ automake autoconf libtool which ];
+  depsBuildBuild = [ buildPackages.stdenv.cc ];
+  nativeBuildInputs = [ automake autoconf libtool which ];
 
   NIX_CFLAGS_LINK = [ "-pthread" ];
 
-  patches = [ ./bootstrap.patch ];
+  patches = [ ./bootstrap.patch ./cross.patch ];
 
   # fails 1 out of 1 tests with
   # "lt-ImathTest: testBoxAlgo.cpp:892: void {anonymous}::boxMatrixTransform(): Assertion `b21 == b2' failed"