68f4e80e2c
* Fix CMake package config file There are currently a few issues with how the COIN-OR dependencies are resolved when using `find_package(ortools CONFIG)` to add or-tools to an external CMake project. * With CMake >=3.9.6, we try to find the Clp and Cbc packages using the CONFIG mode of `find_package`. This always fails since neither library provides a CMake config file. * If we address the above issue by instead using the MODULE mode of `find_package`, then we need to add `FindCbc.cmake` and `FindCpl.cmake` scripts to the CMAKE_MODULE_PATH in order to teach CMake how to find these dependencies. I propose that or-tools should install these scripts alongside its config file so that they're available to external CMake projects. * Finally, the `FindCbc.cmake` script included with or-tools defines the variable `CBC_FOUND` when it's successful, rather than `Cbc_FOUND` as expected (CMake variables are case-sensitive). The `FindCpl.cmake` script has a similar issue. As a result, even when the above two points are addressed, `find_package(ortools CONFIG)` will still fail because CMake erroneously thinks that these two dependencies weren't succesfully found. This commit attempts to address the above issues with the following changes: * The or-tools CMake config file is modified to allow searching for Cbc and Cpl using the MODULE mode of `find_package`. * `FindCbc.cmake` and `FindCpl.cmake` are installed with the CMake package config files and are added to the CMAKE_MODULE_PATH if `USE_COINOR` was truthy. * The `FindCbc.cmake` and `FindCpl.cmake` files are modified to change the case of variables they export. * Only install FindXXX.cmake modules if COIN-OR support was enabled
31 lines
803 B
CMake
31 lines
803 B
CMake
#[=======================================================================[.rst:
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FindCbc
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--------
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This module determines the Cbc library of the system.
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IMPORTED Targets
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^^^^^^^^^^^^^^^^
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This module defines :prop_tgt:`IMPORTED` target ``Coin::Cbc`` and ``Coin::OsiCbc``, if
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Cbc has been found.
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Result Variables
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^^^^^^^^^^^^^^^^
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This module defines the following variables:
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::
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Cbc_FOUND - True if Cbc found.
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#]=======================================================================]
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find_package(PkgConfig REQUIRED)
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pkg_check_modules(Cbc REQUIRED cbc IMPORTED_TARGET GLOBAL)
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add_library(Coin::Cbc ALIAS PkgConfig::Cbc)
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add_library(Coin::CbcSolver ALIAS PkgConfig::Cbc)
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pkg_check_modules(OSI_CBC REQUIRED osi-cbc IMPORTED_TARGET GLOBAL)
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add_library(Coin::OsiCbc ALIAS PkgConfig::OSI_CBC)
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