Merge branch 'mgis-patch-fix' into 'master'

[cmake] Only apply mgis patch when CPM_SOURCE_CACHE is defined

See merge request ogs/ogs!5098

scripts/cmake/Dependencies.cmake

@@ -165,15 +165,22 @@ if(OGS_USE_MFRONT)
  find_package(MFrontGenericInterface REQUIRED)
  else()
  set(CMAKE_REQUIRE_FIND_PACKAGE_TFEL TRUE)
+ # Patch only works when CPM_SOURCE_CACHE is set. Following conditional
+ # logic can be removed if
+ # https://github.com/cpm-cmake/CPM.cmake/issues/577 is resolved.
+ if(NOT "${CPM_SOURCE_CACHE}" STREQUAL "")
+ set(_mgis_patch_args
+ PATCHES ${PROJECT_SOURCE_DIR}/scripts/cmake/mgis-flags.patch
+ )
+ message(STATUS "Adding mgis-flags.patch.")
+ endif()
  CPMAddPackage(
  NAME MGIS
  GITHUB_REPOSITORY thelfer/MFrontGenericInterfaceSupport
  GIT_TAG rliv-2.0
  OPTIONS "enable-doxygen-doc OFF" "enable-fortran-bindings OFF"
  "enable-website OFF"
- EXCLUDE_FROM_ALL
- YES SYSTEM TRUE PATCHES
- ${PROJECT_SOURCE_DIR}/scripts/cmake/mgis-flags.patch
+ EXCLUDE_FROM_ALL YES SYSTEM TRUE ${_mgis_patch_args}
  )
  list(APPEND DISABLE_WARNINGS_TARGETS MFrontGenericInterface)
  endif()