[CMake] fix build with glpk

CMakeLists.txt

@@ -78,7 +78,7 @@ SET(${PROJECT_NAME}_SOURCES
 
 if(USE_GLPK)
   SET(${PROJECT_NAME}_SOURCES ${${PROJECT_NAME}_SOURCES}
-    glpk-wrapper.cpp
+    src/glpk-wrapper.cpp
     )
 endif(USE_GLPK)
 
@@ -88,7 +88,7 @@ TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PUBLIC $<INSTALL_INTERFACE:include>)
 TARGET_LINK_LIBRARIES(${PROJECT_NAME} curves::curves hpp-centroidal-dynamics::hpp-centroidal-dynamics)
 
 if(USE_GLPK)
-  TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} ${glpk_INCLUDE_DIR})
+  TARGET_INCLUDE_DIRECTORIES(${PROJECT_NAME} PUBLIC ${glpk_INCLUDE_DIR})
   TARGET_LINK_LIBRARIES(${PROJECT_NAME} ${glpk_LIBRARY})
 endif(USE_GLPK)