CMake: Fix model debug builds (#2222)

Debug flags were set too late so that most of the model extension was built without them.

src/CMakeLists.template.cmake

@@ -39,6 +39,18 @@ find_package(Amici TPL_AMICI_VERSION REQUIRED HINTS
              ${CMAKE_CURRENT_LIST_DIR}/../../build)
 message(STATUS "Found AMICI ${Amici_DIR}")
 
+# Debug build?
+if("$ENV{ENABLE_AMICI_DEBUGGING}" OR "$ENV{ENABLE_GCOV_COVERAGE}")
+  add_compile_options(-UNDEBUG -O0 -g)
+  set(CMAKE_BUILD_TYPE "Debug")
+endif()
+
+# coverage options
+if($ENV{ENABLE_GCOV_COVERAGE})
+  string(APPEND CMAKE_CXX_FLAGS_DEBUG " --coverage")
+  string(APPEND CMAKE_EXE_LINKER_FLAGS_DEBUG " --coverage")
+endif()
+
 set(MODEL_DIR ${CMAKE_CURRENT_LIST_DIR})
 
 set(SRC_LIST_LIB TPL_SOURCES ${MODEL_DIR}/wrapfunctions.cpp)
@@ -66,18 +78,6 @@ if(NOT "${AMICI_PYTHON_BUILD_EXT_ONLY}")
   target_link_libraries(simulate_${PROJECT_NAME} ${PROJECT_NAME})
 endif()
 
-# Debug build?
-if("$ENV{ENABLE_AMICI_DEBUGGING}" OR "$ENV{ENABLE_GCOV_COVERAGE}")
-  add_compile_options(-UNDEBUG -O0 -g)
-  set(CMAKE_BUILD_TYPE "Debug")
-endif()
-
-# coverage options
-if($ENV{ENABLE_GCOV_COVERAGE})
-  string(APPEND CMAKE_CXX_FLAGS_DEBUG " --coverage")
-  string(APPEND CMAKE_EXE_LINKER_FLAGS_DEBUG " --coverage")
-endif()
-
 # SWIG
 option(ENABLE_SWIG "Build swig/python library?" ON)
 if(ENABLE_SWIG)