Replace the call to int64_t in the blasutil test by explicit types

Some platforms define int64_t to be long long even for C++03. If this is
the case we miss the definition of internal::make_unsigned for this
type. If we just define the template we get duplicated definitions
errors for platforms defining int64_t as signed long for C++03.

We need to find a way to distinguish both cases at compile-time.

Eigen/src/Core/util/Meta.h

diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h
index c892e49..68452ec 100755
--- a/Eigen/src/Core/util/Meta.h
+++ b/Eigen/src/Core/util/Meta.h
@@ -160,6 +160,10 @@
 template<> struct make_unsigned<signed __int64>   { typedef unsigned __int64 type; };
 template<> struct make_unsigned<unsigned __int64> { typedef unsigned __int64 type; };
 #endif
+
+// TODO: Some platforms define int64_t as long long even for C++03. In this case
+// we are missing the definition for make_unsigned. If we just define it, we get
+// duplicated definitions for platforms defining int64_t as signed long for C++03
 #endif
 
 template <typename T> struct add_const { typedef const T type; };

test/blasutil.cpp

diff --git a/test/blasutil.cpp b/test/blasutil.cpp
index cd87163..255d2a6 100644
--- a/test/blasutil.cpp
+++ b/test/blasutil.cpp
@@ -186,11 +186,17 @@
 {
     for(int i = 0; i < g_repeat; i++)
     {
-        CALL_SUBTEST_1(run_test<int8_t>());
-        CALL_SUBTEST_2(run_test<int16_t>());
-        CALL_SUBTEST_3(run_test<int32_t>());
-        CALL_SUBTEST_4(run_test<int64_t>());
-        CALL_SUBTEST_5(run_test<float_t>());
-        CALL_SUBTEST_6(run_test<double_t>());
+        CALL_SUBTEST_1(run_test<numext::int8_t>());
+        CALL_SUBTEST_2(run_test<numext::int16_t>());
+        CALL_SUBTEST_3(run_test<numext::int32_t>());
+// TODO: Replace this by a call to numext::int64_t as soon as we have a way to
+// detect the typedef for int64_t on all platforms
+#if EIGEN_HAS_CXX11
+        CALL_SUBTEST_4(run_test<signed long long>());
+#else
+        CALL_SUBTEST_4(run_test<signed long>());
+#endif
+        CALL_SUBTEST_5(run_test<numext::float_t>());
+        CALL_SUBTEST_6(run_test<numext::double_t>());
     }
 }
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