Hi Joaquin, Its been a really long time since I compiled Lapack manually and linked it against deal.II (at that time, before we used CMake). I've attached for you a file with my personal notes on how I used to compile Lapack then (circa 2012). I think that you've pretty much covered all of the steps listed there, so "point 7" is the one that I think is most useful on this occasion. Lapack is built as a static library, and I think (although I stand to be corrected) that unless you specifically point CMake/deal.II to a static library then, when building a shared library version of deal.II, it will expect that the libraries it is to link against are also shared libraries.
So what you could do (i.e. what might be easiest right now) is convert the static library of Lapack into a shared one. That you built it with the -FPIC flag would have ensured that this is possible. If you navigate to the lapack library location and run a sensibly modified version of the following two lines > ar -x liblapack.a && gcc -shared *.o -o liblapack.so > -L$DIR_BASE/OpenBLAS/build/lib -lopenblas && rm *.o > ar -x libtmglib.a && gcc -shared *.o -o libtmglib.so > -L$DIR_BASE/OpenBLAS/build/lib -lopenblas && rm *.o then you should be left with both a static and shared version of these two libraries. You can verify that the libraries were correctly assembled by running > ld $DIR_BASE/LAPACK/build/lib/liblapack.so > ld $DIR_BASE/LAPACK/build/lib/libtmglib.so If there are streams of "undefined reference to", then something's gone wrong. I hope that this finally gets you going. Best, Jean-Paul > After *$ make -j8 install*, the next error I got: > > > > > > > > > > > > > *[100%] Built target obj_fe.releaseLinking CXX shared library > ../lib/libdeal_II.so/usr/bin/ld: cannot find -llapackcollect2: error: ld > returned 1 exit statusmake[2]: *** [lib/libdeal_II.so.8.4.1] Error > 1make[1]: *** [source/CMakeFiles/deal_II.dir/all] Error 2make[1]: *** > Waiting for unfinished jobs..../usr/bin/ld: cannot find -llapackcollect2: > error: ld returned 1 exit statusmake[2]: *** [lib/libdeal_II.g.so.8.4.1] > Error 1make[1]: *** [source/CMakeFiles/deal_II.g.dir/all] Error 2make: *** > [all] Error 2* > > Apparently something else I need to do in the installation. > > Please help. > -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
==================================================================================================================================== 4. LAPACK http://www.netlib.org/lapack/ ==================================================================================================================================== 1. Install OpenMPI and OpenBLAS 2. Make directory structure and unzip source mkdir -p $DIR_BASE/LAPACK/build/lib && cd $DIR_BASE/LAPACK tar -zxvf $DIR_SOURCE/LAPACK/lapack-$VSN_LAPACK.tgz -C $DIR_BASE/LAPACK cd $DIR_BASE/LAPACK/lapack-$VSN_LAPACK 3. Copy make.inc.example to make.inc cp make.inc.example make.inc 4. Edit make.inc Old lines to be replaced: FORTRAN = gfortran OPTS = -O2 DRVOPTS = $(OPTS) NOOPT = -O0 LOADER = gfortran LOADOPTS = BLASLIB = ../../librefblas.a LAPACKLIB = liblapack.a TMGLIB = libtmglib.a LAPACKELIB = liblapacke.a Lines 22-27: FORTRAN = $(DIR_BASE)/OpenMPI/build/bin/mpif90 -fimplicit-none -g OPTS = -m64 -fPIC -pthread -fopenmp DRVOPTS = $(OPTS) NOOPT = -g -O0 -fPIC LOADER = $(DIR_BASE)/OpenMPI/build/bin/mpif90 -g LOADOPTS = -pthread -fopenmp CC = $(DIR_BASE)/OpenMPI/build/bin/mpicc CFLAGS = -m64 -fPIC -pthread -fopenmp Line 54: BLASLIB = $(DIR_BASE)/OpenBLAS/build/lib/libopenblas.a LAPACKLIB = liblapack.a TMGLIB = libtmglib.a LAPACKELIB = liblapacke.a 5. Build LAPACK (can't multithread the build) make 2>&1 | tee make_LAPACK.log 6. Testing (need single thread build) make Testing should be done automatically See results in TESTING/*.out 7. Make and "install" shared objects cd $DIR_BASE/LAPACK/lapack-$VSN_LAPACK Copy the files ("too many symbolic links" error when linking to this library if the links are symbolic) ar -x liblapack.a && gcc -shared *.o -o liblapack.so -L$DIR_BASE/OpenBLAS/build/lib -lopenblas && rm *.o cp liblapack.a $DIR_BASE/LAPACK/build/lib && cp liblapack.so $DIR_BASE/LAPACK/build/lib ar -x libtmglib.a && gcc -shared *.o -o libtmglib.so -L$DIR_BASE/OpenBLAS/build/lib -lopenblas && rm *.o cp libtmglib.a $DIR_BASE/LAPACK/build/lib && cp libtmglib.so $DIR_BASE/LAPACK/build/lib ls $DIR_BASE/LAPACK/build/lib 8. Test that libraries were linked properly (there should not be streams of "undefined reference to") ld $DIR_BASE/LAPACK/build/lib/liblapack.so ld $DIR_BASE/LAPACK/build/lib/libtmglib.so 9. Add library to path export LD_LIBRARY_PATH=$DIR_BASE/LAPACK/build/lib:$LD_LIBRARY_PATH
