Define C11 macros such as FLT_DECIMAL_DIG for C++17
* testsuite/18_support/headers/cfloat/values_c++17.cc: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@272615 138bc75d-0d04-0410-961f-82ee72b054a4
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4242c98..85c286a 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2019-06-24 Jonathan Wakely <jwakely@redhat.com>
+
+ * ginclude/float.h (FLT_DECIMAL_DIG, DBL_DECIMAL_DIG, LDBL_DECIMAL_DIG)
+ (FLT_HAS_SUBNORM, DBL_HAS_SUBNORM, LDBL_HAS_SUBNORM, FLT_TRUE_MIN)
+ (DBL_TRUE_MIN, LDBL_TRUE_MIN): Also define for C++17.
+
2019-06-23 Iain Sandoe <iain@sandoe.co.uk>
* config/rs6000/darwin.h: Handle GCC target pragma.
diff --git a/gcc/ginclude/float.h b/gcc/ginclude/float.h
index 9ebae05..4767d7b 100644
--- a/gcc/ginclude/float.h
+++ b/gcc/ginclude/float.h
@@ -210,7 +210,8 @@
#endif /* C99 */
-#if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+#if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \
+ || (defined (__cplusplus) && __cplusplus >= 201703L)
/* Versions of DECIMAL_DIG for each floating-point type. */
#undef FLT_DECIMAL_DIG
#undef DBL_DECIMAL_DIG
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index ac98c0d..2acb150 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,7 @@
+2019-06-24 Jonathan Wakely <jwakely@redhat.com>
+
+ * testsuite/18_support/headers/cfloat/values_c++17.cc: New test.
+
2019-06-20 Jonathan Wakely <jwakely@redhat.com>
* acinclude.m4 (GLIBCXX_ENABLE_DEBUG): Only do debug build for final
diff --git a/libstdc++-v3/testsuite/18_support/headers/cfloat/values_c++17.cc b/libstdc++-v3/testsuite/18_support/headers/cfloat/values_c++17.cc
new file mode 100644
index 0000000..f3efd20
--- /dev/null
+++ b/libstdc++-v3/testsuite/18_support/headers/cfloat/values_c++17.cc
@@ -0,0 +1,37 @@
+// { dg-options "-std=gnu++17" }
+// { dg-do compile { target c++17 } }
+
+// Copyright (C) 2019 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3. If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <cfloat>
+#include "values.cc"
+
+namespace gnu17
+{
+ double d1 = DBL_DECIMAL_DIG;
+ double d2 = DBL_HAS_SUBNORM;
+ double d3 = DBL_TRUE_MIN;
+
+ float f1 = FLT_DECIMAL_DIG;
+ float f2 = FLT_HAS_SUBNORM;
+ float f3 = FLT_TRUE_MIN;
+
+ long double ld1 = LDBL_DECIMAL_DIG;
+ long double ld2 = LDBL_HAS_SUBNORM;
+ long double ld3 = LDBL_TRUE_MIN;
+}
