[committed] libstdc++: Restore test for generate_cannonical with __float128.

[Tomasz Kamiński]

Accidentally dropped from commit.

libstdc++-v3/ChangeLog:

	* testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon_eng.cc:
	Test __float128 when available.
---
Pushed to trunk. Tested x86_64-linux, gencanon_eng.cc
tested with/without -m32 and all standard modes.

 .../uniform_real_distribution/operators/gencanon_eng.cc      | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libstdc++-v3/testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon_eng.cc b/libstdc++-v3/testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon_eng.cc
index c8d5b5d263b..662e3568a30 100644
--- a/libstdc++-v3/testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon_eng.cc
+++ b/libstdc++-v3/testsuite/26_numerics/random/uniform_real_distribution/operators/gencanon_eng.cc
@@ -36,4 +36,9 @@ int main()
   test_all_engines<float>();
   test_all_engines<double>();
   test_all_engines<long double>();
+#ifndef _GLIBCXX_GENERATE_CANONICAL_STRICT
+#  ifdef __SIZEOF_FLOAT128__
+  test_all_engines<__float128>();
+#  endif
+#endif 
 }
-- 
2.52.0