Description of problem:
Consider this program, in pplver.cpp:

#include <cstddef>
#include "ppl.hh"
#include <iostream>
int main() {
   Parma_Polyhedra_Library::C_Polyhedron dummy;
   std::cout << PPL_VERSION_MAJOR << "." << PPL_VERSION_MINOR << "." << PPL_VERSION_REVISION;
   return 0;
}

On an F-25 or Rawhide machine, compile it with 'g++ -std=c++11 -o pplver pplver.cpp -lppl -lgmp'.  The result is a series of errors, starting with this one:

In file included from /usr/include/ppl.hh:25:0,
                 from test.cpp:2:
/usr/include/ppl-x86_64.hh:10677:29: error: typedef ‘Parma_Polyhedra_Library::Checked::typeof’ is initialized (use decltype instead)
 typedef typeof(__mpz_struct()._mp_size) mp_size_field_t;

With C++11 or C++14, decltype has to be used instead of typeof.  Add '-Dtypeof(x)=decltype(x)' to the compiler flags and the build succeeds.

Version-Release number of selected component (if applicable):
ppl-1.1-14.fc25.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Try to build ppl-using code with -std=c++11 or -std=c++14
2.
3.

Actual results:
The errors reported above.

Expected results:
A clean build.

Additional info:
PPL version 1.2 has a fix for this bug.