WIP: new cmake build system

Summary

• Separate cmake files instead of one big DuneMacros.cmake !957 (closed)
• Give all cmake functions the prefix dune_ (included in !957 (closed))
• Add argument to dune_project(<target>) to allow creation of a module library directly
• Remove global include_directories in favor of target_include_directories !944 (closed)
• Link tests created by dune_add_test automatically against module library
• Remove the cmake module include CMakeParseArguments !1008 (merged)
• Remove the cmake variable DUNE_DEFAULT_LIBS !1009 (merged)
• Simplify dune_library_add_sources by using target_sources !1010 (merged)
• Simplify enforcement of required c++ standard in cmake !862 (merged)
• Simplify functions from DuneModuleDependencies.cmake !1249 (merged)
• Set CMAKE_MODULE_PATH in <module>-config.cmake !1038 (closed)
• Move include(DuneModules) into dune-common-config.cmake
• Remove pkg-config support for finding dune packages (was not working before and not used. May be activated later again)
• Extract version of module dependencies from package file (instead of the dune.module file)
• Remove dune_enable_all_packages from default dune project

Superbuild

In order to build several modules in one run, prepare a CMakeLists.txt file in the root directory of all dune modules:

cmake_minimum_required(VERSION 3.13)
project(dune VERSION 2.9 LANGUAGES CXX)

set(dune_modules dune-common dune-geometry dune-localfunctions dune-uggrid dune-grid dune-istl)

set(CMAKE_PREFIX_PATH ${PROJECT_BINARY_DIR})
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/dune-common/cmake/modules)
set(DUNE_DISABLE_SIMD_TESTS TRUE)

enable_testing()
foreach (mod ${dune_modules})
  add_subdirectory(${mod})
endforeach(mod)

include(FeatureSummary)
feature_summary(WHAT ALL)

bin/duneproject

@@ -336,6 +336,8 @@ NAME=`echo $PROJECT | sed -e 's/dune[_-]//'`
 NAME_=`echo $NAME | tr '-' '_'`
 # module name in uppercase with _ instead of -
 UNAME=`echo $PROJECT | tr '-' '_' | sed 's/\(.*\)/\U\1/'`
+# $PROJECT with all non-alphanumeric characters removed
+LIBNAME=`echo $NAME | sed 's/[^a-zA-Z0-9]//'`
 
 ################## README ##################
 echo "- $PROJECT/README"
@@ -373,9 +375,9 @@ An example options file might look like this:
 
 #use this options to configure and make if no other options are given
 CMAKE_FLAGS=" \\
--DCMAKE_CXX_COMPILER=g++-5 \\
+-DCMAKE_CXX_COMPILER=g++-7 \\
 -DCMAKE_CXX_FLAGS='-Wall -pedantic' \\
--DCMAKE_INSTALL_PREFIX=/install/path" #Force g++-5 and set compiler flags
+-DCMAKE_INSTALL_PREFIX=/install/path" #Force g++-7 and set compiler flags
 
 If you save this information into example.opts you can pass the opts file to
 dunecontrol via the --opts option, e. g.
@@ -416,9 +418,7 @@ list(APPEND CMAKE_MODULE_PATH "\${PROJECT_SOURCE_DIR}/cmake/modules"
 include(DuneMacros)
 
 # start a dune project with information from dune.module
-dune_project()
-
-dune_enable_all_packages()
+dune_project($LIBNAME)
 
 add_subdirectory(src)
 add_subdirectory(dune)
@@ -648,7 +648,7 @@ CC_DELIM
 echo "- $PROJECT/doc/doxygen/CMakeLists.txt"
 cat> "$PROJECT/doc/doxygen/CMakeLists.txt" << CC_DELIM
 # shortcut for creating the Doxyfile.in and Doxyfile
-add_doxygen_target()
+dune_add_doxygen_target()
 CC_DELIM
 
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