Change Kokkos namespace to InlineKokkos at compile time

This crappy change is done to avoid potential conflicts with third
party libraries that may use another version of Kokkos (e.g. new
versions of packaged PETSc embeds Trilinos which comes with its own
Kokkos)

CMakeLists.txt

@@ -86,6 +86,10 @@ endif()
 set(GNU_CXX_MIN_VERSION "9.0.0")
 set(CLANG_CXX_MIN_VERSION "10.0.0")
 
+#------------------------------------------------------
+# Change Kokkos namespace to avoid conflicts
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DKokkos=InlineKokkos")
+
 #------------------------------------------------------
 # Pugs default compiler flags
 set(PUGS_CXX_FLAGS "${PUGS_CXX_FLAGS} -Wall -Wextra -pedantic")