Eigen: explicitly disable Fortran usage #704
Merged
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We don't want different packages be created wheter a Fortran compiler is available or not. As Eigen 3.4.0 has no flags to disable the Fortran related code hook into the
CheckLanguge CMake feature.
For the variable
CMAKE_<LANG>_COMPILER
the documentation states the following:We use this to effectively force Eigen to think that there was no Fortan compiler.
Fixes the ninja and nmake vs-16-2019 based toolchains.