Compilation error GNU Fortran - finalization - gcc

Question

I am trying to compile a large code in using GNU compiler.
However, when I try to compile the attached piece of code with GNU Fortran (GCC) 6.1.0, some routines using type fn_grid_nodes_t throw this error message:
#bld .. linking, ...
Undefined symbols for architecture x86_64:
"___final_fn_core_grids_dts_Fn_grid_nodes_t.3665", referenced from:
___fn_depot_utils_MOD_fn_clean_depot in fn_depot_utils.o
Note that using Intel compiler > 15.0, the compilation is successful.
I suspect it is due to how GNU and Intel handle finalization.
Does anyone have any suggestion/workaround about this?
type :: fn_grid_nodes_t
! mpi communicator
type(fmpi_fcomm_t) :: fcomm
! grid description
type(fn_grid_descrp_t) :: grid_descrp
! grid partition description
type(fn_parts_descrp_t) :: parts_descrp
! node hdr plan
type(fn_node_hdr_plan_t) :: node_hdr_plan
! node elem plan
type(fn_node_elem_plan_t) :: node_elem_plan
! exchanger
type(fn_exchr_t) :: exchr_nghb
! active node count
integer(kp_i) :: active_ncnt = -1_kp_i
! dynamic node array
type(fn_node_t),allocatable :: nodes(:)
! auxiliary
real(kp_r),allocatable :: aux_block(:,:,:,:)
end type fn_grid_nodes_t
Thanks for your answers - some additional details:
OS = MacOS Sierra 10.12.1
Compilation: Makefile
Flags: -g -Wall -Wextra -fbacktrace -fbounds-check -fcheck-array-temporaries
Optimization: -O2
Example of compilation of the module:
# FORCE DEPENDECY BETWEEN MODULE AND OBJECT FILES:
$(INCLUDE_DIR)/fn_core_grids_dts.mod \
: $(OBJ_DIR)/fn_core_grids_dts.o
#printf "$(MK_DECOR_BLD) .. build assumed, <$(MK_COLOR_PURPLE)$#$(MK_COLOR_NORMAL)> <-- <$(MK_COLOR_PURPLE)$<$(MK_COLOR_NORMAL)> ... "
#set -e; \
$(MK_COLOR_CMD_SET_RED); \
_tic=$$($(DATE_EPOCH_SEC)); \
$(TOUCH) $#; \
_toc=$$($(DATE_EPOCH_SEC)); \
$(MK_COLOR_CMD_SET_NORMAL); \
printf "[$(MK_COLOR_BLUE)%3.3ds$(MK_COLOR_NORMAL)]" $$(( $$_toc - $$_tic ))
#printf "$(MK_DECOR_OK)\n"
# COMPILE MODULE:
$(OBJ_DIR)/fn_core_grids_dts.o \
: .concoct/fnode-3d/drv/./src/core/grids/write_fn_core_grids_dts/fn_core_grids_dts.f90 \
$(INCLUDE_DIR)/fn_core_nodes_dts.mod \
$(INCLUDE_DIR)/fn_infix_fmpi.mod \
$(INCLUDE_DIR)/fn_core_grids_common.mod \
$(INCLUDE_DIR)/fn_core_exchangers_dts.mod
#printf "$(MK_DECOR_BLD) .. compiling <$(MK_COLOR_YELLOW)$#$(MK_COLOR_NORMAL)> ... "
#set -e; \
$(MK_COLOR_CMD_SET_RED); \
_tic=$$($(DATE_EPOCH_SEC)); \
$(MKDIRP) $(OBJ_DIR) $(INCLUDE_DIR); \
$(FC) -c $< -o $# $(FCFLAGS) $(FCFT_DIRSRCH_MOD) $(INCLUDE_DIR) $(addprefix $(FCFT_DIRSRCH_INCLUDE),$(wildcard $(IDIRS) $(PREPROC_DIR))); \
$(TOUCH) $#; \
_toc=$$($(DATE_EPOCH_SEC)); \
$(MK_COLOR_CMD_SET_NORMAL); \
printf "[$(MK_COLOR_BLUE)%3.3ds$(MK_COLOR_NORMAL)]" $$(( $$_toc - $$_tic ))
#printf "$(MK_DECOR_OK)\n"
Portion of makefile causing the issue:
# FORCE DEPENDECY BETWEEN MODULE AND OBJECT FILES:
$(INCLUDE_DIR)/fn_depot_utils.mod \
: $(OBJ_DIR)/fn_depot_utils.o
#printf "$(MK_DECOR_BLD) .. build assumed, <$(MK_COLOR_PURPLE)$#$(MK_COLOR_NORMAL)> <-- <$(MK_COLOR_PURPLE)$<$(MK_COLOR_NORMAL)> ... "
#set -e; \
$(MK_COLOR_CMD_SET_RED); \
_tic=$$($(DATE_EPOCH_SEC)); \
$(TOUCH) $#; \
_toc=$$($(DATE_EPOCH_SEC)); \
$(MK_COLOR_CMD_SET_NORMAL); \
printf "[$(MK_COLOR_BLUE)%3.3ds$(MK_COLOR_NORMAL)]" $$(( $$_toc - $$_tic ))
#printf "$(MK_DECOR_OK)\n"
# COMPILE MODULE:
$(OBJ_DIR)/fn_depot_utils.o \
: .concoct/fnode-3d/drv/./src/depot/write_fn_depot_utils/fn_depot_utils.f90 \
$(INCLUDE_DIR)/fn_depot_common.mod \
$(INCLUDE_DIR)/fn_depot_share.mod
#printf "$(MK_DECOR_BLD) .. compiling <$(MK_COLOR_YELLOW)$#$(MK_COLOR_NORMAL)> ... "
#set -e; \
$(MK_COLOR_CMD_SET_RED); \
_tic=$$($(DATE_EPOCH_SEC)); \
$(MKDIRP) $(OBJ_DIR) $(INCLUDE_DIR); \
$(FC) -c $< -o $# $(FCFLAGS) $(FCFT_DIRSRCH_MOD) $(INCLUDE_DIR) $(addprefix $(FCFT_DIRSRCH_INCLUDE),$(wildcard $(IDIRS) $(PREPROC_DIR))); \
$(TOUCH) $#; \
_toc=$$($(DATE_EPOCH_SEC)); \
$(MK_COLOR_CMD_SET_NORMAL); \
printf "[$(MK_COLOR_BLUE)%3.3ds$(MK_COLOR_NORMAL)]" $$(( $$_toc - $$_tic ))
#printf "$(MK_DECOR_OK)\n"
Note that fn_depot_common.mod includes module fn_core_grids_dts.
It is definitely not an issue related to a missing module not being included where needed.