From 571d549ddd76a6836ba30e48e6bc74cf2d4b384f Mon Sep 17 00:00:00 2001
From: Eric Fiselier <eric@efcs.ca>
Date: Wed, 22 Jun 2016 00:50:09 +0000
Subject: [PATCH] Guard use of non-standard macros in denorm_min() tests.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@273344 91177308-0d34-0410-b5e6-96231b3b80d8
---
 .../limits/numeric.limits.members/denorm_min.pass.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/test/std/language.support/support.limits/limits/numeric.limits.members/denorm_min.pass.cpp b/test/std/language.support/support.limits/limits/numeric.limits.members/denorm_min.pass.cpp
index a452d4e99..8deb28d3f 100644
--- a/test/std/language.support/support.limits/limits/numeric.limits.members/denorm_min.pass.cpp
+++ b/test/std/language.support/support.limits/limits/numeric.limits.members/denorm_min.pass.cpp
@@ -12,6 +12,7 @@
 // denorm_min()
 
 #include <limits>
+#include <cfloat>
 #include <cassert>
 
 template <class T>
@@ -47,7 +48,17 @@ int main()
     test<__int128_t>(0);
     test<__uint128_t>(0);
 #endif
+#if defined(__FLT_DENORM_MIN__) // guarded because these macros are extensions.
     test<float>(__FLT_DENORM_MIN__);
     test<double>(__DBL_DENORM_MIN__);
     test<long double>(__LDBL_DENORM_MIN__);
+#endif
+#if defined(FLT_TRUE_MIN) // not currently provided on linux.
+    test<float>(FLT_TRUE_MIN);
+    test<double>(DBL_TRUE_MIN);
+    test<long double>(LDBL_TRUE_MIN);
+#endif
+#if !defined(__FLT_DENORM_MIN__) && !defined(FLT_TRUE_MIN)
+#error Test has no expected values for floating point types
+#endif
 }