CMake: Also ignore -Wignored-attributes for external includes

diff --git a/include/deal.II/base/config.h.in b/include/deal.II/base/config.h.in
index 7472b2b8db887dd333dbf68750c9db69fa98248f..978d4d7504c0f049141f863cd1c67b88602fbb14 100644 (file)
--- a/include/deal.II/base/config.h.in
+++ b/include/deal.II/base/config.h.in
@@ -311,6 +311,7 @@ _Pragma("GCC diagnostic ignored \"-Wunused-private-field\"")     \
 _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")  \
 _Pragma("GCC diagnostic ignored \"-Wunused-but-set-variable\"")  \
 _Pragma("GCC diagnostic ignored \"-Wexpansion-to-defined\"")     \
+_Pragma("GCC diagnostic ignored \"-Wignored-attributes\"")       \
 _Pragma("GCC diagnostic warning \"-Wpragmas\"")
 
 #  define DEAL_II_ENABLE_EXTRA_DIAGNOSTICS                       \