[cmake] Remove GLPK which is not used by dumux

If a downstream package uses GLPK they have to find and link it themselves

cmake/modules/DumuxMacros.cmake

@@ -7,7 +7,6 @@ include(AddInputFileLinks)
 include(DumuxDoxygen)
 include(DumuxTestMacros)
 
-find_package(GLPK QUIET)
 find_package(Gnuplot QUIET)
 set(DUMUX_HAVE_GNUPLOT ${GNUPLOT_FOUND})
 find_package(Gstat QUIET)

cmake/modules/FindGLPK.cmake

-# SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-#
-# Module that checks whether GLPK is available and usable.
-#
-# Variables used by this module which you may want to set:
-# GLPK_ROOT         Path list to search for GLPK
-#
-# Sets the following variable:
-#
-# GLPK_FOUND           True if GLPK available and usable.
-# GLPK_INCLUDE_DIRS    Path to the GLPK include dirs.
-# GLPK_LIBRARIES       Name to the GLPK library.
-#
-include_guard(GLOBAL)
-
-# look for header files, only at positions given by the user
-find_path(GLPK_INCLUDE_DIR
-  NAMES glpk.h
-  PATHS ${GLPK_PREFIX}
-        ${GLPK_ROOT}
-        "${CMAKE_SOURCE_DIR}/../external/glpk"
-  PATH_SUFFIXES "glpk" "include/glpk" "include" "SRC" "src"
-  NO_DEFAULT_PATH
-)
-
-# look for header files, including default paths
-find_path(GLPK_INCLUDE_DIR
-  NAMES glpk.h
-  PATH_SUFFIXES "glpk" "include/glpk" "include" "SRC" "src"
-)
-
-# look for library, only at positions given by the user
-find_library(GLPK_LIBRARY
-  NAMES "glpk"
-  PATHS ${GLPK_PREFIX}
-        ${GLPK_ROOT}
-        "${CMAKE_SOURCE_DIR}/../external/glpk"
-  PATH_SUFFIXES "lib" "lib32" "lib64" "libglpk" "src" "src/.libs"
-  NO_DEFAULT_PATH
-)
-
-# look for library files, including default paths
-find_library(GLPK_LIBRARY
-  NAMES "glpk"
-  PATH_SUFFIXES "lib" "lib32" "lib64" "libglpk"
-)
-
-# check version specific macros
-include(CheckCSourceCompiles)
-include(CMakePushCheckState)
-cmake_push_check_state()
-
-# we need if clauses here because variable is set variable-NOTFOUND
-#
-if(GLPK_INCLUDE_DIR)
-  set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${GLPK_INCLUDE_DIR})
-endif(GLPK_INCLUDE_DIR)
-if(GLPK_LIBRARY)
-  set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} ${GLPK_LIBRARY})
-endif(GLPK_LIBRARY)
-
-# handle package arguments
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(
-  "GLPK"
-  DEFAULT_MSG
-  GLPK_INCLUDE_DIR
-  GLPK_LIBRARY
-)
-
-mark_as_advanced(GLPK_INCLUDE_DIR GLPK_LIBRARY)
-
-# if both headers and library are found, store results
-if(GLPK_FOUND)
-  set(GLPK_INCLUDE_DIRS ${GLPK_INCLUDE_DIR})
-  set(GLPK_LIBRARIES    ${GLPK_LIBRARY})
-  # log result
-  file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
-    "Determining location of GLPK succeeded:\n"
-    "Include directory: ${GLPK_INCLUDE_DIRS}\n"
-    "Library directory: ${GLPK_LIBRARIES}\n\n")
-  set(GLPK_DUNE_COMPILE_FLAGS "${GLPK_INCLUDE_DIRS}"
-    CACHE STRING "Compile flags used by DUNE when compiling GLPK programs")
-  set(GLPK_DUNE_LIBRARIES ${GLPK_LIBRARIES}
-    CACHE STRING "Libraries used by DUNE when linking GLPK programs")
-else(GLPK_FOUND)
-  # log erroneous result
-  file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-    "Determining location of GLPK failed:\n"
-    "Include directory: ${GLPK_INCLUDE_DIRS}\n"
-    "Library directory: ${GLPK_LIBRARIES}\n\n")
-endif(GLPK_FOUND)
-
-# set HAVE_GLPK for config.h
-set(HAVE_GLPK ${GLPK_FOUND})
-
-# register all GLPK related flags
-if(GLPK_FOUND)
-  dune_register_package_flags(COMPILE_DEFINITIONS "ENABLE_GLPK=1"
-                              LIBRARIES "${GLPK_DUNE_LIBRARIES}"
-                              INCLUDE_DIRS "${GLPK_INCLUDE_DIRS}")
-endif()
-
-# text for feature summary
-include(FeatureSummary)
-set_package_properties("GLPK" PROPERTIES
-  DESCRIPTION "GNU Linear Programming Kit")