[petsc-users] cmake, pkg-config and Libs.private

[Yann Jobic]

Hi all,

I solved my problem, but i don't know if it's the right way to do it. 
Libs.private is used in case of static linking. So I added:
execute_process ( COMMAND pkg-config PETSc --libs --static 
OUTPUT_VARIABLE STATIC_LIBS)
string(STRIP ${STATIC_LIBS} STATIC_LIBS)
message("Libs static : " ${STATIC_LIBS})

And it works. Is it the right way to do it ?

Thanks,

Best regards,

Yann


Le 11/03/2020 à 11:59, Yann Jobic a écrit :
> Hi all,
> 
> I'm trying to create a correct CMakeLists.txt in order to compile a 
> petsc program.
> I can compile my code, but i cannot link it.
> 
> I have this link command :
> /local/lib/openmpi/gcc8/4.0.3/bin/mpicc -g  -rdynamic 
> CMakeFiles/Test1.dir/src/dvm_dg1D_qff_2dV.c.o 
> CMakeFiles/Test1.dir/src/computeHermCoeff.c.o 
> CMakeFiles/Test1.dir/src/dg1DFuncs.c.o  -o Test1 
> -L/local/lib/petsc/3.12/p4/gcc_8.3.1/openmpi-gcc-opti/lib -lpetscts 
> -lpetscsnes -lpetscksp -lpetscdm -lpetscmat -lpetscvec -lpetscsys
> /bin/ld: 
> /local/lib/petsc/3.12/p4/gcc_8.3.1/openmpi-gcc-opti/lib/libpetscsys.a(dlimpl.o): 
> référence au symbole non défini « dlclose@@GLIBC_2.2.5 »
> //usr/lib64/libdl.so.2 : erreur lors de l'ajout de symboles : DSO 
> manquant dans la ligne de commande
> 
> But if i add Libs.private to this line in a terminal to test the 
> command, it works:
> mpicc   -rdynamic CMakeFiles/Test1.dir/src/dvm_dg1D_qff_2dV.c.o 
> CMakeFiles/Test1.dir/src/computeHermCoeff.c.o 
> CMakeFiles/Test1.dir/src/dg1DFuncs.c.o  -o Test1 
> -L/local/lib/petsc/3.12/p4/gcc_8.3.1/openmpi-gcc-opti/lib -lpetscts 
> -lpetscsnes -lpetscksp -lpetscdm -lpetscmat -lpetscvec -lpetscsys 
> -L/local/lib/petsc/3.12/p4/gcc_8.3.1/openmpi-gcc-opti/lib 
> -L/local/lib/openmpi/gcc8/4.0.3/lib -L/usr/lib/gcc/x86_64-redhat-linux/8 
> -lHYPRE -lcmumps -ldmumps -lsmumps -lzmumps -lmumps_common -lpord 
> -lscalapack -lumfpack -lklu -lcholmod -lbtf -lccolamd -lcolamd -lcamd 
> -lamd -lsuitesparseconfig -lsuperlu -lsuperlu_dist -lml -lp4est -lsc 
> -lflapack -lfblas -lptesmumps -lptscotchparmetis -lptscotch 
> -lptscotcherr -lesmumps -lscotch -lscotcherr -lnetcdf -lhdf5hl_fortran 
> -lhdf5_fortran -lhdf5_hl -lhdf5 -lparmetis -lmetis -ltriangle -lm -lz 
> -lsz -lX11 -lstdc++ -ldl -lmpi_usempif08 -lmpi_usempi_ignore_tkr 
> -lmpi_mpifh -lmpi -lgfortran -lm -lgfortran -lm -lgcc_s -lquadmath 
> -lpthread -lrt -lquadmath -lstdc++ -ldl
> 
> So I should be using Libs.private in the link command, but i don't know 
> how to tell cmake to do so.
> 
> What is the correct line that i have to add to CMakeLists.txt in order 
> to have Libs and Libs.private from the PETSc.pc file ?
> What I am doing wrong ?
> 
> Thanks,
> 
> Best regards,
> 
> Yann
> 
> PS : My CMakeLists.txt so far :
> cmake_minimum_required(VERSION 2.8.11)
> 
> list (APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake-modules)
> 
> set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
> 
> # set root of location to find PETSc configuration
> set(PETSC $ENV{PETSC_DIR}/$ENV{PETSC_ARCH})
> set(ENV{PKG_CONFIG_PATH} ${PETSC}/lib/pkgconfig)
> 
> # Determine PETSc compilers
> execute_process ( COMMAND pkg-config PETSc --variable=ccompiler COMMAND 
> tr -d '\n' OUTPUT_VARIABLE C_COMPILER)
> SET(CMAKE_C_COMPILER ${C_COMPILER})
>    execute_process ( COMMAND pkg-config PETSc --variable=cxxcompiler 
> COMMAND tr -d '\n' OUTPUT_VARIABLE CXX_COMPILER)
> if (CXX_COMPILER)
>    SET(CMAKE_CXX_COMPILER ${CXX_COMPILER})
> endif (CXX_COMPILER)
> execute_process ( COMMAND pkg-config PETSc --variable=fcompiler COMMAND 
> tr -d '\n' OUTPUT_VARIABLE FORTRAN_COMPILER)
> if (FORTRAN_COMPILER)
>    SET(CMAKE_Fortran_COMPILER ${FORTRAN_COMPILER})
>    enable_language(Fortran)
> endif (FORTRAN_COMPILER)
> 
> find_package(PkgConfig REQUIRED)
> pkg_search_module(PETSC REQUIRED PETSc)
> 
> set(SOURCES src/dvm_dg1D_qff_2dV.c src/computeHermCoeff.c src/dg1DFuncs.c)
> include_directories(${PETSC_INCLUDE_DIRS})
> include_directories(includes)
> 
> add_executable(Test1 ${SOURCES})
> target_link_libraries(Test1 ${PETSC_LDFLAGS})