Build OpenMVS with eigen3.4

SuperBuild/cmake/External-OpenMVS.cmake

@@ -12,6 +12,17 @@ externalproject_add(vcg
     INSTALL_COMMAND ""
 )
 
+externalproject_add(eigen34
+    GIT_REPOSITORY  https://gitlab.com/libeigen/eigen.git
+    GIT_TAG         3.4
+    UPDATE_COMMAND  ""
+    SOURCE_DIR      ${SB_SOURCE_DIR}/eigen34
+    CONFIGURE_COMMAND ""
+    BUILD_IN_SOURCE 1
+    BUILD_COMMAND   ""
+    INSTALL_COMMAND ""
+)
+
 SET(ARM64_CMAKE_ARGS "")
 if(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "aarch64" )
   SET(ARM64_CMAKE_ARGS -DOpenMVS_USE_SSE=OFF)
@@ -25,7 +36,7 @@ if(UNIX)
 endif()
 
 ExternalProject_Add(${_proj_name}
-  DEPENDS           ceres opencv vcg
+  DEPENDS           ceres opencv vcg eigen34
   PREFIX            ${_SB_BINARY_DIR}
   TMP_DIR           ${_SB_BINARY_DIR}/tmp
   STAMP_DIR         ${_SB_BINARY_DIR}/stamp
@@ -40,6 +51,7 @@ ExternalProject_Add(${_proj_name}
   CMAKE_ARGS
     -DOpenCV_DIR=${SB_INSTALL_DIR}/lib/cmake/opencv4
     -DVCG_ROOT=${SB_SOURCE_DIR}/vcg
+    -DEIGEN3_INCLUDE_DIR=${SB_SOURCE_DIR}/eigen34/
     -DCMAKE_BUILD_TYPE=Release
     -DCMAKE_INSTALL_PREFIX=${SB_INSTALL_DIR}
     ${GPU_CMAKE_ARGS}