fixed: do not execute library unit tests with an in-tree ifem

CMakeLists.txt

@@ -29,6 +29,7 @@ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
                       ${CMAKE_SOURCE_DIR}/cmake/Modules)
 
 INCLUDE(Apps/Common/cmake/UseMultiArch.cmake)
+set(IFEM_LIBRARY_BUILD 1)
 
 if(NOT IFEM_AS_SUBMODULE)
   FIND_PACKAGE(IFEMDeps)

cmake/Modules/IFEMTesting.cmake

@@ -40,7 +40,7 @@ macro(add_check_target)
     add_library(gtest IMPORTED ${GTEST_LIBRARIES})
     include_directories(${GTEST_INCLUDE_DIRS})
   endif()
-  if(IFEM_AS_SUBMODULE OR NOT IFEM_COMMON_APP_BUILD)
+  if(IFEM_AS_SUBMODULE OR IFEM_LIBRARY_BUILD)
     ifem_add_unittests(${IFEM_PATH})
   endif()
   if(NOT TARGET gtest)