[CMake] Creating a list of link directories from a variable

[Hendrik Sattler]

Hi,

If the library is a shared object, try to NOT use all those libraries. If they are used in the library but are not part of its public API, you most likely don't need to link them. If you have no missing symbols when linking, you can avoid overlinking you program.

If this is a static library, you have a lot more work. For each library without -l, use find_library() and use the library dirs as hints. Do NOT use link_directories().

HS




Am 1. April 2016 00:22:09 MESZ, schrieb "Salazar De Troya, Miguel" <salazardetro1 at llnl.gov>:
>Hello
>
>I am trying to compile a program with a library that provides a bash
>script to generate the dependencies, libraries and the link directories
>for the Makefile. I want to generate a CMakeLists.txt that can handle
>these dependencies from that library. I have been able to come up with
>regexp that can extract the information and put it into a variable with
>the dirs or library names separated by comma, for instance:
>
>INCLUDE_DIRS =
>
>/g/g92/miguel/code/libmesh_2D/include;/usr/include/curl;/usr/include/glpk;/usr/local/tools/vtk-6.1.0/include/vtk-6.1;/g/g92/miguel/petsc-3.6.2/include;/g/g92/miguel/petsc-3.6.2/miguel-opt/include;/usr/local/tools/openmpi-intel-1.8.4/include/openmpi/opal/mca/hwloc/hwloc191/hwloc/include;/usr/local/tools/openmpi-intel-1.8.4/include/openmpi/opal/mca/event/libevent2021/libevent;/usr/local/tools/openmpi-intel-1.8.4/include/openmpi/opal/mca/event/libevent2021/libevent/include;/usr/local/tools/openmpi-intel-1.8.4/include;/usr/local/tools/openmpi-intel-1.8.4/include/openmpi;/usr/local/tools/boost-mpi-1.55.0//include
>
>
>LIBS =
>
>-lcurl;-lhdf5;-lglpk;-lvtkIOCore-6.1;-lvtkCommonCore-6.1;-lvtkCommonDataModel-6.1;-lvtkFiltersCore-6.1;-lvtkIOXML-6.1;-lvtkImagingCore-6.1;-lvtkIOImage-6.1;-lvtkImagingMath-6.1;-lz;-lpetsc;-lcmumps;-ldmumps;-lsmumps;-lzmumps;-lmumps_common;-lpord;-lscalapack;-lHYPRE;-lml;-llapack;-lblas;-lparmetis;-lmetis;-lX11;-lhwloc;-lssl;-lcrypto;-lmpi_usempif08;-lmpi_usempi_ignore_tkr;-lmpi_mpifh;-lifport;-lifcore;-lm;-lmpi;-limf;-lsvml;-lirng;-lipgo;-ldecimal;-lcilkrts;-lstdc++;-lgcc_s;-lirc;-lpthread;-lirc_s;-ldl;-lmesh_opt
>
>
>LIB_DIRS =
>
>/usr/lib;/lib;/usr/lib64;/usr/local/tools/vtk-6.1.0/lib;/g/g92/miguel/petsc-3.6.2/miguel-opt/lib;/usr/local/tools/openmpi-intel-1.8.4/lib;/usr/local/tools/ic-14.0.174/composer_xe_2013_sp1.3.174/compiler/lib/intel64;/usr/lib/gcc/x86_64-redhat-linux/4.4.7;/g/g92/miguel/code/libmesh_2D/lib
>
>
>These are variables in my environment that I use in CMake with
>$ENV{VAR}. How can I use this information for the commands:
>
>include_directories($ENV{INCLUDE_DIRS})
>
>link_directories($ENV{LIB_DIRS})
>
>target_link_libraries($ENV{LIBS}) ?
>
>
>It seems that cmake can digest the include directories and the
>target_link_libraries (because they appear correctly in the
>compilation), but not the link_directories. Why? Also, I’ve read that
>it is more correct to use find_library() instead. How would I iterate
>over the LIBS? Can I use a single LIB_DIRS (with all the information
>above) in the PATHS argument of find_library()
>
>
>Thanks
>
>Miguel
>
>
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