Hello;
after merging the opm-cmake Pull Requests I am now in the process of trying to
simplify the build system in opm-cmake. Currently my focus is on removing the
sibling-build features.
Much of the build system is permeated by the assumption that the different
modules are in ${module} subdirectory, i.e. if we invoke cmake as:
cmake -DOPM_ROOT=/path/opm
The build system will search for headers and libraries of opm-core in:
header-search : /path/opm/opm-core/include/{...}
library-search : /path/opm/opm-core/lib64/{...}
Whereas when the opm modules are installed with 'make install' they will go to:
header-install : ${CMAKE_INSTALL_PREFIX}/include/{...}
library-install : ${CMAKE_INSTALL_PREFIX}/lib64/{...}
I.e. the module subdirectory is absent. My suggestion plan is that:
1. The implicit ${module} subdirectory is removed from the eventual
search path - if you invoke cmake with -DOPM_ROOT= cmake will search for
headers and libraries in ${OPM_ROOT}/include and ${OPM_ROOT}/lib64 respectively.
2. If you want to employ a different version of one the modules you can
invoke cmake as:
cmake -DOPM_ROOT=/default/root
-DDUNE_CORNERPOINT_ROOT=/special/dune-cornerpoint
The use of module subdirectories is not strictly bound to sibling builds; but
they certainly simplify sibling-build search semantics. Dune also seems to have
these directories.
Any opinions on this? Are there some fundamental issues with the use of module
subdirectories which I have overlooked?
Joakim
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