Merge branch 'cherry-pick-75fa89c9' into 'releases/2.6'

Merge branch 'bugfix/cmake-apply-compile-options-in-add-dune-all-flags' into 'master'

See merge request !461

cmake/modules/DuneMacros.cmake

@@ -1263,9 +1263,11 @@ macro(add_dune_all_flags targets)
   get_property(incs GLOBAL PROPERTY ALL_PKG_INCS)
   get_property(defs GLOBAL PROPERTY ALL_PKG_DEFS)
   get_property(libs GLOBAL PROPERTY ALL_PKG_LIBS)
+  get_property(opts GLOBAL PROPERTY ALL_PKG_OPTS)
   foreach(target ${targets})
     set_property(TARGET ${target} APPEND PROPERTY INCLUDE_DIRECTORIES ${incs})
     set_property(TARGET ${target} APPEND PROPERTY COMPILE_DEFINITIONS ${defs})
     target_link_libraries(${target} ${DUNE_LIBS} ${libs})
+    target_compile_options(${target} PUBLIC ${opts})
   endforeach()
 endmacro(add_dune_all_flags targets)