Makefile for compiling multiple source files

[Vijay M]

Something else i noticed just now is that when i rename an example
file in snes directory from .F to .F90 or .f90, the code cannot
compile it and i get the previously stated warning message

g77: C.F90: linker input file unused because linking not done

Not sure if it helps but it is just a sanity check that at least the
error is consistent for all .F90 and not something specific to my
code.

Vijay

On 5/14/07, Satish Balay <balay at mcs.anl.gov> wrote:
> Ah - I missed this part.
>
> You have PETSc+MPI [LAM] installed with gcc+g77. However you want to
> use these libraries from 'f90' [Is this absoft or something else?]
>
> You'll have to build both PETSc & MPI with the same set of compilers
> you intend to use with your code.
>
> You can do:
>
> ./config/configure.py CC=gcc FC=f90 --download-mpich=1 --download-f-blas-lapack=1
>
> Satish
>
> On Mon, 14 May 2007, Vijay M wrote:
>
> > Running "mpif77 -show" gives the following output
> >
> > g77: unrecognized option `-show'
> > /usr/lib/gcc/x86_64-redhat-linux/3.4.6/libfrtbegin.a(frtbegin.o)(.text+0x1e):
> > In function `main':
> > : undefined reference to `MAIN__'
> > collect2: ld returned 1 exit status
> > mpif77: No such file or directory
> >
> > I dont think that is a valid option in the current version of gcc i am using.
> >
> > Otherwise, when i try to compile and run the tutorial examples,
> > everything works perfectly. Hence, both the c and fortran compiler are
> > working as expected. I have attached the detailed commands with all
> > linker options used for the compilation.
> > ================================================
> > [vijay at linux src]$ cd ~/work/petsc/src/ksp/ksp/examples/tutorials
> >
> > [vijay at linux tutorials]$ make ex2
> > mpicc -c -fPIC -Wall -Wwrite-strings -Wno-strict-aliasing -g3
> > -I/home/vijay/work/petsc/src/dm/mesh/sieve -I/home/vijay/work/petsc
> > -I/home/vijay/work/petsc/bmake/linux-gnu-c-debug
> > -I/home/vijay/work/petsc/include -I/usr/include
> > -D__SDIR__="src/ksp/ksp/examples/tutorials/" ex2.c
> >
> > mpicc -fPIC -Wall -Wwrite-strings -Wno-strict-aliasing -g3  -o ex2
> > ex2.o  -Wl,-rpath,/home/vijay/work/petsc/lib/linux-gnu-c-debug
> > -L/home/vijay/work/petsc/lib/linux-gnu-c-debug -lpetscksp -lpetscdm
> > -lpetscmat -lpetscvec -lpetsc     -llapack -lblas -lm
> > -Wl,-rpath,/usr/lib64 -L/usr/lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../..
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../..
> > -Wl,-rpath,/lib/../lib64 -L/lib/../lib64 -Wl,-rpath,/usr/lib/../lib64
> > -L/usr/lib/../lib64 -ldl -llammpio -llamf77mpi -lmpi -llam -laio
> > -lutil -lgcc_s -lpthread -lg2c -lm -Wl,-rpath,/usr/lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../..
> > -Wl,-rpath,/lib/../lib64 -Wl,-rpath,/usr/lib/../lib64 -lm
> > -Wl,-rpath,/usr/lib64 -L/usr/lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../..
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../..
> > -Wl,-rpath,/lib/../lib64 -L/lib/../lib64 -Wl,-rpath,/usr/lib/../lib64
> > -L/usr/lib/../lib64 -ldl -llammpio -llamf77mpi -lmpi -llam -laio
> > -lutil -lgcc_s -lpthread -ldl
> > /bin/rm -f ex2.o
> >
> > [vijay at linux tutorials]$ make ex2f
> > mpif77 -c  -fPIC -Wall -g   -I/home/vijay/work/petsc
> > -I/home/vijay/work/petsc/bmake/linux-gnu-c-debug
> > -I/home/vijay/work/petsc/include -I/usr/include        -o ex2f.o
> > ex2f.F
> >
> > mpif77 -fPIC -Wall -g   -o ex2f ex2f.o
> > -Wl,-rpath,/home/vijay/work/petsc/lib/linux-gnu-c-debug
> > -L/home/vijay/work/petsc/lib/linux-gnu-c-debug -lpetscksp -lpetscdm
> > -lpetscmat -lpetscvec -lpetsc     -llapack -lblas -lm
> > -Wl,-rpath,/usr/lib64 -L/usr/lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../..
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../..
> > -Wl,-rpath,/lib/../lib64 -L/lib/../lib64 -Wl,-rpath,/usr/lib/../lib64
> > -L/usr/lib/../lib64 -ldl -llammpio -llamf77mpi -lmpi -llam -laio
> > -lutil -lgcc_s -lpthread -lg2c -lm -Wl,-rpath,/usr/lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../..
> > -Wl,-rpath,/lib/../lib64 -Wl,-rpath,/usr/lib/../lib64 -lm
> > -Wl,-rpath,/usr/lib64 -L/usr/lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../../../lib64
> > -Wl,-rpath,/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../..
> > -L/usr/lib/gcc/x86_64-redhat-linux/3.4.6/../../..
> > -Wl,-rpath,/lib/../lib64 -L/lib/../lib64 -Wl,-rpath,/usr/lib/../lib64
> > -L/usr/lib/../lib64 -ldl -llammpio -llamf77mpi -lmpi -llam -laio
> > -lutil -lgcc_s -lpthread -ldl
> > /bin/rm -f ex2f.o
> > ================================================
> > Satish, the only difference between these examples and my code is that
> > i have multiple files to compile with and without petsc calls and each
> > mpif77 call does not create an object file but instead tries to link
> > and create an output executable. I am not sure how to get around this.
> > Any ideas ?
> >
> > Vijay
> >
> > On 5/14/07, Satish Balay <balay at mcs.anl.gov> wrote:
> > >
> > > Looks like this is a problem with your mpif77.
> > >
> > > What do you have for:
> > >
> > > mpif77 -show
> > >
> > > Did PETSc configure fine with it? Are you able to run PETSc examples?
> > >
> > > cd src/ksp/ksp/examples/tutorials
> > > make ex2
> > > make ex2f
> > >
> > > Satish
> > >
> > > On Mon, 14 May 2007, Vijay M wrote:
> > >
> > > > Satish,
> > > >
> > > > Thanks for the reply. I modified your makefile (which is quite close
> > > > to what i had to start with) and when i run it, I get an error message
> > > > to the effect
> > > >
> > > > mpif77 -c  -fPIC -Wall -g   -I/home/vijay/work/petsc
> > > > -I/home/vijay/work/petsc/bmake/linux-gnu-c-debug
> > > > -I/home/vijay/work/petsc/include -I/usr/include        -o C.o C.F90
> > > > g77: C.F90: linker input file unused because linking not done
> > > >
> > > > mpif77 -c  -fPIC -Wall -g    -o A.o A.f90
> > > > g77: A.f90: linker input file unused because linking not done
> > > >
> > > > This is repeated for all source files. Hence when the linker command
> > > > is issued, there are no object files created in my local directory. I
> > > > observed this message previously and hence went through the manual cpp
> > > > route. Do i have to set some environment or configuration variable to
> > > > get this working ?
> > > >
> > > > Vijay
> > > >
> > > >
> > > > On 5/14/07, Satish Balay <balay at mcs.anl.gov> wrote:
> > > > >
> > > > > On Mon, 14 May 2007, Vijay M wrote:
> > > > >
> > > > > > Hi,
> > > > > >
> > > > > > I've been trying to use PETSc for one of my projects lately and I was
> > > > > > wondering how to create the makefile to compile multiple source files
> > > > > > with and without PETSc calls in fortran efficiently. I am sure it is a
> > > > > > newbie question but I could not find much information about this
> > > > > > anywhere.
> > > > > >
> > > > > > For example, you could take 4 files. A.f90, B.f90 without petsc calls
> > > > > > and C.f90 and D.f90 with petsc calls. If I were to compile them I have
> > > > > > to use
> > > > >
> > > > > If C, D are PETSc sources, then they should be C.F90, D.F90 [not .f90
> > > > > sufix]
> > > > >
> > > > > >
> > > > > > f90 -c A.f90 -o A.o
> > > > > > f90 -c B.f90 -o B.o
> > > > > > cpp C.f90 -I<include dir> > Ctemp.f90
> > > > > > f90 -c Ctemp.f90 -o C.o
> > > > > > cpp  D.f90 -I<include dir> > Dtemp.f90
> > > > > > f90 -c Dtemp.f90 -o D.o
> > > > > >
> > > > > > g77 <PETSC options> A.o B.o C.o D.o -o out.exe
> > > > >
> > > > > this assumes A.o has the main subroutine - if not - you should list
> > > > > the corresponding .o file first.
> > > > >
> > > > > >
> > > > > > PETSc is configured to use g77 as the linker in my server but since I
> > > > > > am compiling each file separately, I cannot quite use the linker
> > > > > > directly (It treats the source as a linker script). Is there a
> > > > > > simplified way to do this or have I missed something vital ?!
> > > > >
> > > > >
> > > > > I'm attaching a suitable PETSc makefile for your config.
> > > > >
> > > > > Satish
> > > > >
> > > > > > I would appreciate any kind of help you can provide. If you need more
> > > > > > information, let me know. Thanks.
> > > > > >
> > > > > > vijay
> > > > > >
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