From 19f85b39592cf3cc1f15cd976c649fb9a6cfcc21 Mon Sep 17 00:00:00 2001
From: Markus Blatt <markus@dr-blatt.de>
Date: Fri, 23 Dec 2022 10:31:12 +0100
Subject: [PATCH] Also search for Alberta with pkgconfig to be DUNE compliant

If OPM modules are used as DUNE modules then CMake otherwise
complains about missing targets:

```
CMake Error at /usr/lib/x86_64-linux-gnu/cmake/dune-grid/dune-grid-targets.cmake:78 (set_target_properties):
  The link interface of target "dunealbertagrid1d" contains:

    PkgConfig::Alberta1d

  but the target was not found.  Possible reasons include:

    * There is a typo in the target name.
    * A find_package call is missing for an IMPORTED target.
    * An ALIAS target is missing.

```
---
 cmake/Modules/FindAlberta.cmake | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/cmake/Modules/FindAlberta.cmake b/cmake/Modules/FindAlberta.cmake
index e6fcd5853..685c1c6b0 100644
--- a/cmake/Modules/FindAlberta.cmake
+++ b/cmake/Modules/FindAlberta.cmake
@@ -44,3 +44,17 @@ else()
   set(ALBERTA_FOUND OFF)
   set(Alberta_FOUND OFF)
 endif()
+
+# PkgConfig targets are required if OPM modules are used as DUNE modules
+# (e.g. in Debian's Packaging automatic tests)
+find_package(PkgConfig)
+if(PkgConfig_FOUND)
+  set(_opm_alberta_bkup_path  ${CMAKE_PREFIX_PATH})
+  set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} ${ALBERTA_ROOT})
+
+  foreach(dim RANGE 1 ${ALBERTA_MAX_WORLD_DIM})
+    pkg_check_modules(Alberta${dim}d IMPORTED_TARGET GLOBAL "alberta-grid_${dim}d")
+  endforeach()
+
+  set(CMAKE_PREFIX_PATH ${_opm_alberta_bkup_path})
+endif()