set template depth on MAC OS

diff --git a/cmake/checks/check_02_system_features.cmake b/cmake/checks/check_02_system_features.cmake
index 9485bae7f4a90c99ef854f54699194dfc495b406..cd58f4141609ebeccfbfc73c611008b3d5832208 100644 (file)
--- a/cmake/checks/check_02_system_features.cmake
+++ b/cmake/checks/check_02_system_features.cmake
@@ -89,6 +89,12 @@ IF(CMAKE_SYSTEM_NAME MATCHES "Darwin")
   # TODO: MM: Check whether this is still necessary...
   #
   STRIP_FLAG(DEAL_II_LINKER_FLAGS "-rdynamic")
+
+  #
+  # At least on Clang 5.0.0 the template depth is set to 128, which is too low
+  # to compile parts of the library. Fix this by setting a large value.
+  #
+  ENABLE_IF_SUPPORTED(DEAL_II_CXX_FLAGS "-ftemplate-depth=1024")  
 ENDIF()