Upgrade to 2022-era LLVM LIBCXX

third_party/libcxx/float.h

@@ -0,0 +1,95 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_FLOAT_H
+#define _LIBCPP_FLOAT_H
+
+/*
+    float.h synopsis
+
+Macros:
+
+    FLT_ROUNDS
+    FLT_EVAL_METHOD     // C99
+    FLT_RADIX
+
+    FLT_MANT_DIG
+    DBL_MANT_DIG
+    LDBL_MANT_DIG
+
+    FLT_HAS_SUBNORM     // C11
+    DBL_HAS_SUBNORM     // C11
+    LDBL_HAS_SUBNORM    // C11
+
+    DECIMAL_DIG         // C99
+    FLT_DECIMAL_DIG     // C11
+    DBL_DECIMAL_DIG     // C11
+    LDBL_DECIMAL_DIG    // C11
+
+    FLT_DIG
+    DBL_DIG
+    LDBL_DIG
+
+    FLT_MIN_EXP
+    DBL_MIN_EXP
+    LDBL_MIN_EXP
+
+    FLT_MIN_10_EXP
+    DBL_MIN_10_EXP
+    LDBL_MIN_10_EXP
+
+    FLT_MAX_EXP
+    DBL_MAX_EXP
+    LDBL_MAX_EXP
+
+    FLT_MAX_10_EXP
+    DBL_MAX_10_EXP
+    LDBL_MAX_10_EXP
+
+    FLT_MAX
+    DBL_MAX
+    LDBL_MAX
+
+    FLT_EPSILON
+    DBL_EPSILON
+    LDBL_EPSILON
+
+    FLT_MIN
+    DBL_MIN
+    LDBL_MIN
+
+    FLT_TRUE_MIN        // C11
+    DBL_TRUE_MIN        // C11
+    LDBL_TRUE_MIN       // C11
+
+*/
+
+#include <__config>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#  pragma GCC system_header
+#endif
+
+#if __has_include_next(<float.h>)
+#  include_next <float.h>
+#endif
+
+#ifdef __cplusplus
+
+#ifndef FLT_EVAL_METHOD
+#define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
+#endif
+
+#ifndef DECIMAL_DIG
+#define DECIMAL_DIG __DECIMAL_DIG__
+#endif
+
+#endif // __cplusplus
+
+#endif // _LIBCPP_FLOAT_H