Fixed compilation without GPU.

CMakeLists.txt

@@ -286,6 +286,9 @@ if (OPT_ENABLE_GPU_SOLVER)
         add_library(gmshdg SHARED ${LIBGMSHDG_SOURCES})
         target_link_libraries(gmshdg ${LINK_LIBS})
     endif()
+else()
+    add_library(gmshdg SHARED ${LIBGMSHDG_SOURCES})
+    target_link_libraries(gmshdg ${LINK_LIBS})
 endif()
 
 
@@ -309,31 +312,34 @@ if (OPT_ENABLE_GPU_SOLVER)
         add_executable(maxwell_solver ${MAXWELL_SOURCES})
         target_link_libraries(maxwell_solver gmshdg)
     endif()
+else()
+    add_executable(maxwell_solver ${MAXWELL_SOURCES})
+    target_link_libraries(maxwell_solver gmshdg)
 endif()
 
 ########## tests
 option(OPT_BUILD_TESTS "Build tests" OFF)
 if (OPT_BUILD_TESTS)
     add_executable(test_basics tests/test_basics.cpp)
-    target_link_libraries(test_basics gmshdg)
+    target_link_libraries(test_basics gmshdg ${LINK_LIBS})
 
     add_executable(test_mass tests/test_mass.cpp)
-    target_link_libraries(test_mass gmshdg)
+    target_link_libraries(test_mass gmshdg ${LINK_LIBS})
 
     add_executable(test_differentiation tests/test_differentiation.cpp)
-    target_link_libraries(test_differentiation gmshdg)
+    target_link_libraries(test_differentiation gmshdg ${LINK_LIBS})
 
     add_executable(test_lifting tests/test_lifting.cpp)
-    target_link_libraries(test_lifting gmshdg)
+    target_link_libraries(test_lifting gmshdg ${LINK_LIBS})
 
     if (OPT_ENABLE_GPU_SOLVER)
         add_executable(test_differentiation_gpu tests/test_differentiation_gpu.cpp)
-        target_link_libraries(test_differentiation_gpu gmshdg)
+        target_link_libraries(test_differentiation_gpu gmshdg ${LINK_LIBS})
 
         add_executable(profile_differentiation_gpu tests/profile_differentiation_gpu.cpp)
-        target_link_libraries(profile_differentiation_gpu gmshdg)
+        target_link_libraries(profile_differentiation_gpu gmshdg ${LINK_LIBS})
 
         add_executable(test_lifting_gpu tests/test_lifting_gpu.cpp)
-        target_link_libraries(test_lifting_gpu gmshdg)
+        target_link_libraries(test_lifting_gpu gmshdg ${LINK_LIBS})
     endif()
 endif()