mv the mpreal copy in its own folder

(transplanted from ea4a1960f0cfd64ecccda5f52a6c43ede1e6c271
)

unsupported/Eigen/MPRealSupport

@@ -45,6 +45,8 @@ namespace Eigen {
     * via the <a href="http://www.holoborodko.com/pavel/?page_id=12">MPFR C++</a>
     * library which itself is built upon <a href="http://www.mpfr.org/">MPFR</a>/<a href="http://gmplib.org/">GMP</a>.
     *
+    * You can find a copy of MPFR C++ that is known to be compatible in the unsupported/test/mpreal folder.
+    *
     * Here is an example:
     *
 \code
@@ -129,18 +131,6 @@ int main()
     return a + (b-a) * random<mpfr::mpreal>();
   }
 
-  template<> struct conj_impl<mpfr::mpreal> { inline static const mpfr::mpreal& run(const mpfr::mpreal& x) { return x; } };
-  template<> struct real_impl<mpfr::mpreal> { inline static const mpfr::mpreal& run(const mpfr::mpreal& x) { return x; } };
-  template<> struct imag_impl<mpfr::mpreal> { inline static const mpfr::mpreal run(const mpfr::mpreal&)   { return mpfr::mpreal(0); } };
-  template<> struct abs_impl<mpfr::mpreal> { inline static const mpfr::mpreal run(const mpfr::mpreal& x)  { return mpfr::fabs(x); } };
-  template<> struct abs2_impl<mpfr::mpreal> { inline static const mpfr::mpreal run(const mpfr::mpreal& x) { return x*x; } };
-  template<> struct sqrt_impl<mpfr::mpreal> { inline static const mpfr::mpreal run(const mpfr::mpreal& x) { return mpfr::sqrt(x); } };
-  template<> struct exp_impl<mpfr::mpreal> { inline static const mpfr::mpreal run(const mpfr::mpreal& x)  { return mpfr::exp(x); } };
-  template<> struct log_impl<mpfr::mpreal> { inline static const mpfr::mpreal run(const mpfr::mpreal& x)  { return mpfr::log(x); } };
-  template<> struct sin_impl<mpfr::mpreal> { inline static const mpfr::mpreal run(const mpfr::mpreal& x)  { return mpfr::sin(x); } };
-  template<> struct cos_impl<mpfr::mpreal> { inline static const mpfr::mpreal run(const mpfr::mpreal& x)  { return mpfr::cos(x); } };
-  template<> struct pow_impl<mpfr::mpreal> { inline static const mpfr::mpreal run(const mpfr::mpreal& x, const mpfr::mpreal& y)  { return mpfr::pow(x, y); } };
-
   bool isMuchSmallerThan(const mpfr::mpreal& a, const mpfr::mpreal& b, const mpfr::mpreal& prec)
   {
     return mpfr::abs(a) <= mpfr::abs(b) * prec;

unsupported/test/CMakeLists.txt

@@ -80,7 +80,7 @@ ei_add_test(FFT)
 find_package(MPFR 2.3.0)
 find_package(GMP)
 if(MPFR_FOUND)
-  include_directories(${MPFR_INCLUDES})
+  include_directories(${MPFR_INCLUDES} ./mpreal)
   ei_add_property(EIGEN_TESTED_BACKENDS "MPFR C++, ")
   set(EIGEN_MPFR_TEST_LIBRARIES ${MPFR_LIBRARIES} ${GMP_LIBRARIES})
   ei_add_test(mpreal_support "" "${EIGEN_MPFR_TEST_LIBRARIES}" )

unsupported/test/mpreal_support.cpp

@@ -42,6 +42,6 @@ void test_mpreal_support()
 }
 
 extern "C" {
-#include "dlmalloc.c"
+#include "mpreal/dlmalloc.c"
 }
-#include "mpreal.cpp"
+#include "mpreal/mpreal.cpp"