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Change <quadmath.h> config to not use it at all if we don't have __has_include as GCC may be configured with --disable-libquadmath but still signal that it supports __float128

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jzmaddock
2016-01-01 16:49:48 +00:00
parent 587eb660aa
commit 74ff2db959
2 changed files with 13 additions and 15 deletions
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16
include/boost/math/special_functions/fpclassify.hpp
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@@ -81,7 +81,12 @@ is used.
#include <float.h>
#endif
#ifdef BOOST_MATH_USE_FLOAT128
#ifdef __has_include
#if __has_include("quadmath.h")
#include "quadmath.h"
#define BOOST_MATH_HAS_QUADMATH_H
#endif
#endif
#endif
#ifdef BOOST_NO_STDC_NAMESPACE
@@ -124,9 +129,14 @@ inline bool is_nan_helper(T, const boost::false_type&)
{
return false;
}
#ifdef BOOST_MATH_USE_FLOAT128
#if defined(BOOST_MATH_USE_FLOAT128)
#if defined(BOOST_MATH_HAS_QUADMATH_H)
inline bool is_nan_helper(__float128 f, const boost::true_type&) { return ::isnanq(f); }
inline bool is_nan_helper(__float128 f, const boost::false_type&) { return ::isnanq(f); }
#else
inline bool is_nan_helper(__float128 f, const boost::true_type&) { return ::isnan(static_cast<double>(f)); }
inline bool is_nan_helper(__float128 f, const boost::false_type&) { return ::isnan(static_cast<double>(f)); }
#endif
#endif
}
@@ -519,7 +529,7 @@ inline bool (isinf)(long double x)
return detail::isinf_impl(static_cast<value_type>(x), method());
}
#endif
#ifdef BOOST_MATH_USE_FLOAT128
#if defined(BOOST_MATH_USE_FLOAT128) && defined(BOOST_MATH_HAS_QUADMATH_H)
template<>
inline bool (isinf)(__float128 x)
{
@@ -611,7 +621,7 @@ inline bool (isnan)(long double x)
return detail::isnan_impl(x, method());
}
#endif
#ifdef BOOST_MATH_USE_FLOAT128
#if defined(BOOST_MATH_USE_FLOAT128) && defined(BOOST_MATH_HAS_QUADMATH_H)
template<>
inline bool (isnan)(__float128 x)
{

12
include/boost/math/tools/config.hpp
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@@ -265,18 +265,6 @@
# define BOOST_MATH_INT_VALUE_SUFFIX(RV, SUF) RV##SUF
#endif
//
// Test whether to support __float128, if we don't have quadmath.h then this can't currently work:
//
#ifndef BOOST_MATH_USE_FLOAT128
#ifdef __has_include
#if ! __has_include("quadmath.h")
#define BOOST_MATH_DISABLE_FLOAT128
#endif
#elif !defined(BOOST_ARCH_X86)
#define BOOST_MATH_DISABLE_FLOAT128
#endif
#endif
//
// And then the actual configuration:
//
#if defined(_GLIBCXX_USE_FLOAT128) && defined(BOOST_GCC) && !defined(__STRICT_ANSI__) \