[Bug plugins/67122] New: [5/6 Regression] installed plugin headers not sufficient

[doko at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67122

            Bug ID: 67122
           Summary: [5/6 Regression] installed plugin headers not
                    sufficient
           Product: gcc
           Version: 5.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: plugins
          Assignee: unassigned at gcc dot gnu.org
          Reporter: doko at gcc dot gnu.org
  Target Milestone: ---

[forwarded from https://bugs.debian.org/794605]

gcc -E -shared - -o /dev/null -I`gcc -print-file-name=plugin`/include 2>&1
<<EOF
 #include "gcc-plugin.h"
 #include "tree.h"
 #include "tm.h"
 #include "rtl.h"
 #ifdef ENABLE_BUILD_WITH_CXX
 #warning g++
 #else
 #warning gcc
 #endif
EOF

It yields on my system:
In file included from
/usr/lib/gcc/x86_64-linux-gnu/5/plugin/include/hash-set.h:24:0,
                 from
/usr/lib/gcc/x86_64-linux-gnu/5/plugin/include/gcc-plugin.h:33,
                 from <stdin>:1:
/usr/lib/gcc/x86_64-linux-gnu/5/plugin/include/hash-table.h:201:15: fatal
error: new: No such file or directory
compilation terminated.

This looks to me like some very basic parts are not working correctly.
Currently the build-essential is updated from 4.9 to 5.2.1, but this problem
prevents the gcc-plugins from working.

At the location gcc-plugin-dev breaks on the "#include <new>" rule:
..
#define TYPED_HASHTAB_H

#include "ggc.h"
#include "hashtab.h"
#include <new>

template<typename, typename, typename> class hash_map;
template<typename, typename> class hash_set;

/* The ordinary memory allocator.  */
..