[Trilinos-Users] Fortran name mangling

Baker, Christopher G. bakercg at ornl.gov
Tue Dec 14 03:54:40 MST 2010

Try looking at libmyappLib.a so see what the symbol is called:
nm libmyappLib.a | grep -i trilinos_interface

Also, it won't hurt to verify what the Fortran compiler is doing:
mpif90 $(FORT_FLAGS) $(INCLUDE_DIRS) $(DEFINES) -c Fortran_calls_Trilinos_CC_Interface.f90
nm Fortran_calls_Trilinos_CC_Interface.o | grep -i trilinos_interface


On 12/13/10 11:02 PM, "Alireza Nejadmalayeri" <Alireza.Nejadmalayeri at colorado.edu<mailto:Alireza.Nejadmalayeri at colorado.edu>> wrote:


I have been trying to compile a simple mixed Fortran/CC code using makefile build system, but it is not going so well.
I would appreciate any advice on how to debug this problem:

1) I have just 2 source files:   Fortran_calls__Trilinos_CC_Interface.f90   &  Trilinos_Interface.cpp

2) Trilinos_Interface.cpp  contains a function,  void Trilinos_Interface(...)  , which is communicating with Trilinos

3) Inside Fortran_calls__Trilinos_CC_Interface.f90,     Trilinos_Interface(...)   is called

4) Inside Trilinos_Interface.cpp,  I have defined:
#define Trilinos_Interface  trilinos_interface_

5) And the build part of the makefile:

MyApp.exe: libmyappLib.a
 mpif90 $(FORT_FLAGS) $(LINK_FLAGS) $(INCLUDE_DIRS) $(DEFINES) $(LIBRARY_DIRS) libmyappLib.a $(LIBRARIES) Fortran_calls__Trilinos_CC_Interface.f90 -o MyApp.exe

libmyappLib.a: Trilinos_Interface.o
 $(Trilinos_AR) cr libmyappLib.a Trilinos_Interface.o

 $(CXX) -c $(CXX_FLAGS) $(INCLUDE_DIRS) $(DEFINES) Trilinos_Interface.cpp

The reason I use mpif90 is that  $FORT  is  mpif77, though I think there is no difference here.

But I am getting this:

/tmp/iforteBcFzw.o: In function `fortran_calls_c':
/usr/rmt_share/scratch95/a/alireza/The_Trilions_Project/Trilinos_Users/TrilinosUsers__EpetraOperatorAztecOO__FcallsCC2/Fortran_calls__Trilinos_CC_Interface.f90:270: undefined reference to `trilinos_interface_'
make: *** [MyApp.exe] Error 1

Besides, I notice "lower under" mangling while configuring:

FORTRAN_MANGLING: Bingo!  LOWER UNDER is the correct fortran name mangling!

-- Fortran name mangling: LOWER UNDER
-- Detecting Fortran/C Interface

Thank you,

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