can successfully compile openmvg into project.

src/CMakeLists.txt

@@ -2,30 +2,83 @@
 # installed. You should not increase this version, as doing so will cause
 # the plugin to fail to compile for some customers of the plugin.
 cmake_minimum_required(VERSION 3.10)
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
-include(ExternalProject)
+function(dump_cmake_variables)
+    get_cmake_property(_variableNames VARIABLES)
+    list (SORT _variableNames)
+    foreach (_variableName ${_variableNames})
+        if (ARGV0)
+            unset(MATCHED)
 
-project(archimedes_mobile_lib_library VERSION 0.0.1 LANGUAGES C)
+            #case sensitive match
+            # string(REGEX MATCH ${ARGV0} MATCHED ${_variableName})
+            #
+            #case insenstitive match
+            string( TOLOWER "${ARGV0}" ARGV0_lower )
+            string( TOLOWER "${_variableName}" _variableName_lower )
+            string(REGEX MATCH ${ARGV0_lower} MATCHED ${_variableName_lower})
 
-ExternalProject_Add(openMVG
-  GIT_REPOSITORY "git@github.com:src-r-r/openMVG.git"
-  GIT_TAG "develop"
-  SOURCE_SUBDIR "src"
-  CMAKE_ARGS "-DCMAKE_INSTALL_PREFIX=${CMAKE_BUILD_DIR} -DCMAKE_INCLUDE-PATH=${CMAKE_BUILD_DIR}/include"
-  PREFIX ${CMAKE_BUILD_DIR}
-  INSTALL_DIR ${CMAKE_BUILD_DIR}
+            if (NOT MATCHED)
+                continue()
+            endif()
+        endif()
+        message(STATUS "${_variableName}=${${_variableName}}")
+    endforeach()
+endfunction()
+
+project(archimedes_mobile_lib_library VERSION 0.0.1 LANGUAGES CXX)
+
+set (OPENMVG_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/../../openMVG/src)
+set (FFMPEG_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/../../ffmpeg_install/include)
+set (ARCHIMEDES_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR})
+find_package(
+  OpenMVG
+  REQUIRED
 )
 
+set(PNG_SHARED ON CACHE BOOL "" FORCE)
+set(PNG_STATIC OFF CACHE BOOL "" FORCE)
+set(PNG_EXECUTABLES OFF CACHE BOOL "" FORCE) # we only want lib
+set(PNG_TESTS OFF CACHE BOOL "" FORCE) # we only want lib
+set(SKIP_INSTALL_ALL OFF CACHE BOOL "" FORCE) # we only want lib
+
+# find_package(PNG
+#   REQUIRED
+#   HINTS "../"
+# )
+
+add_definitions(${PNG_DEFINITIONS})
+
 add_library(archimedes_mobile_lib SHARED
-  "archimedes_mobile_lib.c"
+  "image.cxx"
 )
 
-target_link_libraries(archimedes_mobile_lib ${OPENMVG_LIBRARIES})
-include_directories(${OPENMVG_INCLUDE_DIRS})
 
-set_target_properties(archimedes_mobile_lib PROPERTIES
-  PUBLIC_HEADER archimedes_mobile_lib.h
+dump_cmake_variables("^png")
+
+message("LIBRARIES:" ${OpenMVG_LIBRARIES})
+
+target_link_libraries(
+   archimedes_mobile_lib
+   ${CMAKE_CURRENT_SOURCE_DIR}/../../libpng/_install/lib/libpng16.so
+   ${CMAKE_CURRENT_SOURCE_DIR}/../../openMVG/build/_install/lib/libopenMVG_image.a
+   ${OPENMVG_LIBRARIES}
+)
+
+include_directories(
+  ${FFMPEG_INCLUDE_DIRS}
+  ${OPENMVG_INCLUDE_DIRS}
+  ${ARCHIMEDES_INCLUDE_DIRS}
+  ${PNG_INCLUDE_DIRS}
+)
+
+set_target_properties(archimedes_mobile_lib
+  PROPERTIES
+  PUBLIC_HEADER image.h
   OUTPUT_NAME "archimedes_mobile_lib"
 )
+target_link_options(archimedes_mobile_lib PRIVATE "-Wl,-Bstatic")
+target_link_options(archimedes_mobile_lib PRIVATE "-Wl,-Bdynamic")
 
-target_compile_definitions(archimedes_mobile_lib PUBLIC DART_SHARED_LIB)
+target_compile_definitions(archimedes_mobile_lib PUBLIC DART_SHARED_LIB)