[CMake] Using cmake to compile mixed C++ and Fortran code

[Bill Hoffman]

On 6/2/2012 8:26 AM, Shipeng Shu wrote:
> Hi, I'm writing a C++ code but I want to also use some of the Fortran
> code that has been previously tested.
> And I'm new to cmake.
>
> My CmakeList.txt looks like this:
>
> PROJECT (IRR CXX Fortran)
> ENABLE_LANGUAGE(Fortran)
>
> SET(SRC_LIST demo.cpp global.cpp global_variables.cpp init_config.cpp
> input.cpp irr.cpp output.cpp ./src_tools/rng.cpp global.h
> global_variables.h init_config.h input.h irr.h ./src_tools/nr3.h
> output.h ./src_tools/rng.h ./src_tools/vector3.h
> ./src_tools/tool_output.h ./src_tools/tools.cpp ./src_tools/tools.h
> ./src_tools/timer.h ./src_tools/timer.cpp ./src_tools/difconnector.h)
> SET(SRC_FORTRAN_LIST ./src_tools/difquat.f ./src_tools/fourn.f)
>
> SET(CMAKE_CXX_FLAGS "-O3 -ip")
> ADD_EXECUTABLE(irr.x ${SRC_LIST} ${SRC_FORTRAN_LIST})
>
> But the compiler gives me error information like these:
>
>
> CMakeFiles/irr.x.dir/src_tools/difquat.o: In function `difquat_':
> /home/spshu/9_new_KMC_code/12.irr/src_tools/difquat.f:(.text+0xc4):
> undefined reference to `for_write_seq_lis'
> /home/spshu/9_new_KMC_code/12.irr/src_tools/difquat.f:(.text+0xef):
> undefined reference to `for_write_seq_lis_xmit'
> /home/spshu/9_new_KMC_code/12.irr/src_tools/difquat.f:(.text+0x159):
> undefined reference to `for_open'
> /home/spshu/9_new_KMC_code/12.irr/src_tools/difquat.f:(.text+0x1cc):
> undefined reference to `for_open'
> /home/spshu/9_new_KMC_code/12.irr/src_tools/difquat.f:(.text+0x214):
> undefined reference to `for_read_seq_lis'
> /home/spshu/9_new_KMC_code/12.irr/src_tools/difquat.f:(.text+0x24e):
> undefined reference to `for_close'
> /home/spshu/9_new_KMC_code/12.irr/src_tools/difquat.f:(.text+0xb94):
> undefined reference to `for_write_seq_fmt'
> /home/spshu/9_new_KMC_code/12.irr/src_tools/difquat.f:(.text+0xbb9):
> undefined reference to `for_write_seq_fmt_xmit'
>
>
> It seems to me that I need some Fortran library, but I think Cmake
> should have include them since I enabled Fortran. I'm confused about it.
>
> Could you please tell me why I get all these things?
>
> How should I modify the CmakeList.txt to get things work?
>


Looks like you are not linking all the libraries you are using or you 
left source code out of the project.  Where does this symbol come from: 
for_write_seq_fmt_xmit

-Bill