simpleitk: enable SimpleElastix module

Note that building SimpleITK with shared libraries had to be disabled
when building against Elastix (which doesn't support building with
shared libraries for some reason) due to a linker error.
However, the Python package correctly builds the needed shared objects.

pkgs/development/libraries/simpleitk/default.nix

@@ -4,6 +4,7 @@
 , cmake
 , swig4
 , lua
+, elastix
 , itk
 }:
 
@@ -23,6 +24,7 @@ stdenv.mkDerivation (finalAttrs: {
     swig4
   ];
   buildInputs = [
+    elastix
     lua
     itk
   ];
@@ -30,7 +32,8 @@ stdenv.mkDerivation (finalAttrs: {
   # 2.0.0: linker error building examples
   cmakeFlags = [
     "-DBUILD_EXAMPLES=OFF"
-    "-DBUILD_SHARED_LIBS=ON"
+    "-DBUILD_SHARED_LIBS=OFF"
+    "-DSimpleITK_USE_ELASTIX=ON"
   ];
 
   meta = with lib; {

pkgs/development/python-modules/simpleitk/default.nix

@@ -4,6 +4,7 @@
 , fetchFromGitHub
 , cmake
 , swig4
+, elastix
 , itk
 , numpy
 , simpleitk
@@ -20,8 +21,17 @@ buildPythonPackage rec {
     make
   '';
 
-  nativeBuildInputs = [ cmake swig4 scikit-build ];
-  propagatedBuildInputs = [ itk simpleitk numpy ];
+  nativeBuildInputs = [
+    cmake
+    swig4
+    scikit-build
+  ];
+  propagatedBuildInputs = [
+    elastix
+    itk
+    simpleitk
+    numpy
+  ];
 
   pythonImportsCheck = [ "SimpleITK" ];
 }