Rewrite FindGMP to provide imported targets

Summary

This MR adds imported-targets to the FindGMP.cmake module, following modern cmake guidelines.

Details

Instead of exporting include directories and libraries as variables, the find modules exports an imported target that contains all the necessary information to include and link GMP. Two such imported targets are provided: GMP::gmp and GMP::gmpxx for the C and C++ library, respectively.

Acknowledgements

This find-module is developed together with @lukas.riedel

changed milestone to %New CMake Build-System

added 1 commit

• 0f0086ed - Link GMPxx library to C library GMP

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added buildsystem label

added 1 commit

• fb2b3dad - Update AddGMPFlags to link to imported target

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added 1 commit

• 88545960 - link against GMP::gmpxx and set ENABLE_GMP=1 in add_dune_gmp_flags

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added 1 commit

• 4967af23 - set ENABLE_GMP=1 for package flags

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added 1 commit

• 9ec4e981 - Move HAVE_GMP and dune_register_package_flags to AddGMPFlags

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added 1 commit

• 4cbbe8a8 - Update AddGMPFlags to link to imported target

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added 2 commits

• a8e4ff18 - Rewrite FindGMP to provide imported targets
• b88054d7 - Update AddGMPFlags to link to imported target

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enabled an automatic merge when the pipeline for b88054d7 succeeds

merged

mentioned in commit 2917908b

mentioned in issue #199 (closed)