cycle in constraints graph

[andlaus]

recently cmake started to spit the following warning at me:

CMake Warning at /home/and/src/opm-common/cmake/Modules/OpmSatellites.cmake:295 (add_executable):
  Cannot generate a safe runtime search path for target tutorial1 because
  there is a cycle in the constraint graph:

    dir 0 is [/home/and/src/opm-common/lib]
    dir 1 is [/home/and/src/opm-material/lib]
    dir 2 is [/home/and/src/opm-grid/lib]
    dir 3 is [/home/and/src/ert/install/lib/x86_64-linux-gnu]
      dir 5 must precede it due to runtime library [libecl.so.2]
    dir 4 is [/home/and/tmp/boost-clang-install/lib]
    dir 5 is [/home/and/src/ert/build/lib/x86_64-linux-gnu]
      dir 3 must precede it due to runtime library [libecl.so.2]
    dir 6 is [/usr/lib/openmpi/lib]

  Some of these libraries may not be found correctly.
Call Stack (most recent call first):
  CMakeLists.txt:297 (opm_add_test)

without going into it too deeply, this looks like a problem caused by sibling builds. (maybe FindERT.cmake detects an installed version of the library as well as a sibling one?) also, this may or not be due to the fact that I compiled using ERT using GCC 5.2.1 while I used clang 3.6.2 for Dune and OPM. (given that ERT is plain-C, I consider this being the culprit somewhat unlikely.)

[atgeirr]

What should I do to reproduce?

[andlaus]

I have not too much of an idea since I have not looked into this deeply. In retrospect, I noticed that I accidentially switched between clang and gcc for some modules, but I guess that there is an independent bug somewhere: if ERT's installation directory is specified via ERT_ROOT and happens to be in a sibling directory (in my case ~/src/ert/install), it should not add the library path twice, right?

[atgeirr]

it should not add the library path twice, right?

Should not, but I cannot claim with certainty it doesn't (I use a make installed ert).

[andlaus]

(I use a make installed ert).

Me too, but my install prefix is a sibling of the build and the devel directories...

[atgeirr]

Is this still happening?

[andlaus]

at least not to me ;) closing