Merge pull request #2119 from alalek:fix_sfm_build_with_eigen

modules/sfm/src/libmv_light/libmv/base/CMakeLists.txt

-# define the source files
-SET(BASE_SRC )
-
-# define the header files (make the headers appear in IDEs.)
-FILE(GLOB BASE_HDRS *.h)
-
-ADD_LIBRARY(base STATIC ${BASE_SRC} ${BASE_HDRS})
-
-LIBMV_INSTALL_LIB(base)
\ No newline at end of file

modules/sfm/src/libmv_light/libmv/correspondence/CMakeLists.txt

@@ -8,6 +8,10 @@ FILE(GLOB CORRESPONDENCE_HDRS *.h)
 
 ADD_LIBRARY(correspondence STATIC ${CORRESPONDENCE_SRC} ${CORRESPONDENCE_HDRS})
 
-TARGET_LINK_LIBRARIES(correspondence multiview)
+TARGET_LINK_LIBRARIES(correspondence LINK_PRIVATE multiview)
+IF(TARGET Eigen3::Eigen)
+  TARGET_LINK_LIBRARIES(correspondence LINK_PUBLIC Eigen3::Eigen)
+ENDIF()
+
 
 LIBMV_INSTALL_LIB(correspondence)

modules/sfm/src/libmv_light/libmv/multiview/CMakeLists.txt

@@ -17,6 +17,9 @@ SET(MULTIVIEW_SRC conditioning.cc
 FILE(GLOB MULTIVIEW_HDRS *.h)
 
 ADD_LIBRARY(multiview STATIC ${MULTIVIEW_SRC} ${MULTIVIEW_HDRS})
-TARGET_LINK_LIBRARIES(multiview ${GLOG_LIBRARY} numeric)
+TARGET_LINK_LIBRARIES(multiview LINK_PRIVATE ${GLOG_LIBRARY} numeric)
+IF(TARGET Eigen3::Eigen)
+  TARGET_LINK_LIBRARIES(multiview LINK_PUBLIC Eigen3::Eigen)
+ENDIF()
 
 LIBMV_INSTALL_LIB(multiview)

modules/sfm/src/libmv_light/libmv/numeric/CMakeLists.txt

@@ -7,6 +7,8 @@ FILE(GLOB NUMERIC_HDRS *.h)
 
 ADD_LIBRARY(numeric STATIC ${NUMERIC_SRC} ${NUMERIC_HDRS})
 
-TARGET_LINK_LIBRARIES(numeric)
+IF(TARGET Eigen3::Eigen)
+  TARGET_LINK_LIBRARIES(numeric LINK_PUBLIC Eigen3::Eigen)
+ENDIF()
 
 LIBMV_INSTALL_LIB(numeric)

modules/sfm/src/libmv_light/libmv/simple_pipeline/CMakeLists.txt

@@ -17,6 +17,6 @@ FILE(GLOB SIMPLE_PIPELINE_HDRS *.h)
 
 ADD_LIBRARY(simple_pipeline STATIC ${SIMPLE_PIPELINE_SRC} ${SIMPLE_PIPELINE_HDRS})
 
-TARGET_LINK_LIBRARIES(simple_pipeline multiview ${CERES_LIBRARIES})
+TARGET_LINK_LIBRARIES(simple_pipeline LINK_PRIVATE multiview ${CERES_LIBRARIES})
 
 LIBMV_INSTALL_LIB(simple_pipeline)