The 8.4.1 cmake throws an error because of the "-gdwarf-2" flag on the 
Intel compiler. Is that flag needed? If no, how can I disable it?

This is what I found in the CmakeError:

Run Build Command:"/usr/bin/gmake" "cmTryCompileExec3077733329/fast"

gmake[1]: Entering directory 
`/work/00434/eijkhout/dealii/build-8.4.1/CMakeFiles/CMakeTmp'

/usr/bin/gmake -f CMakeFiles/cmTryCompileExec3077733329.dir/build.make 
CMakeFiles/cmTryCompileExec3077733329.dir/build

gmake[2]: Entering directory 
`/work/00434/eijkhout/dealii/build-8.4.1/CMakeFiles/CMakeTmp'

/opt/apps/cmake/3.1.0/bin/cmake -E cmake_progress_report 
/work/00434/eijkhout/dealii/build-8.4.1/CMakeFiles/CMakeTmp/CMakeFiles 1

Building CXX object CMakeFiles/cmTryCompileExec3077733329.dir/src.cxx.o

/opt/apps/intel15/mvapich2/2.1/bin/mpicxx    
-DDEAL_II_HAVE_CXX14_CLANGAUTODEBUG_BUG_OK -std=c++14 -O0 -g -gdwarf-2 
-grecord-gcc-switches   -o 
CMakeFiles/cmTryCompileExec3077733329.dir/src.cxx.o -c 
/work/00434/eijkhout/dealii/build-8.4.1/CMakeFiles/CMakeTmp/src.cxx

/work/00434/eijkhout/dealii/build-8.4.1/CMakeFiles/CMakeTmp/src.cxx(6) 
(col. 11): internal error: assertion failed: dump_type_declaration: bad 
type kind (shared/cfe/edgglue/edg_type.c, line 433)



compilation aborted for 
/work/00434/eijkhout/dealii/build-8.4.1/CMakeFiles/CMakeTmp/src.cxx (code 4)

gmake[2]: *** [CMakeFiles/cmTryCompileExec3077733329.dir/src.cxx.o] Error 4

gmake[2]: Leaving directory 
`/work/00434/eijkhout/dealii/build-8.4.1/CMakeFiles/CMakeTmp'

gmake[1]: *** [cmTryCompileExec3077733329/fast] Error 2

gmake[1]: Leaving directory 
`/work/00434/eijkhout/dealii/build-8.4.1/CMakeFiles/CMakeTmp'


Source file was:


      struct foo

      {

        auto func();

      };

      int main()

      {

        foo bar;

      }


Here is my own experimenting:

[staff:compiler:109] cat auto.cxx 

      struct foo

      {

        auto func();

      };

      int main()

      {

        foo bar;

      }

[staff:compiler:110] mpicxx -std=c++11  -c auto.cxx 

auto.cxx(3): error: "auto" function requires a trailing return type

          auto func();

          ^


compilation aborted for auto.cxx (code 2)

[staff:compiler:111] mpicxx -std=c++14  -c auto.cxx 

[staff:compiler:112] mpicxx -std=c++14 -gdwarf-2 -c auto.cxx 

auto.cxx(5) (col. 11): internal error: assertion failed: 
dump_type_declaration: bad type kind (shared/cfe/edgglue/edg_type.c, line 
433)



compilation aborted for auto.cxx (code 4)

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