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include/cxx/cmath: Fix compatibility with external toolchains

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Guard float_t, double_t, and standard math functions with FLT_EVAL_METHOD checks. This ensures compilation when external toolchain's math.h lacks C99/C++11 definitions.

Signed-off-by: aviralgarg05 <gargaviral99@gmail.com>
This commit is contained in:
aviralgarg05
2026-02-02 15:09:31 +05:30
committed by Xiang Xiao
parent 2ec7d90eba
commit 7113b61b1d
1 changed files with 11 additions and 6 deletions
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include/cxx/cmath
+11 -6
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@@ -44,10 +44,15 @@
namespace std
{
#if defined(FLT_EVAL_METHOD) && FLT_EVAL_METHOD == 0
using ::float_t;
using ::double_t;
#else
typedef float float_t;
typedef double double_t;
#endif
#ifdef CONFIG_HAVE_FLOAT
#if defined(CONFIG_HAVE_FLOAT) && defined(FLT_EVAL_METHOD) && FLT_EVAL_METHOD == 0
using ::acosf;
using ::asinf;
using ::atanf;
@@ -82,7 +87,7 @@ namespace std
signbit(float __x)
{ return __builtin_signbit(__x); }
constexpr int
constexpr int
fpclassify(float __x)
{ return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL,
FP_SUBNORMAL, FP_ZERO, __x); }
@@ -105,7 +110,7 @@ namespace std
#endif
#ifdef CONFIG_HAVE_DOUBLE
#if defined(CONFIG_HAVE_DOUBLE) && defined(FLT_EVAL_METHOD) && FLT_EVAL_METHOD == 0
using ::acos;
using ::asin;
using ::atan;
@@ -138,7 +143,7 @@ namespace std
signbit(double __x)
{ return __builtin_signbit(__x); }
constexpr int
constexpr int
fpclassify(double __x)
{ return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL,
FP_SUBNORMAL, FP_ZERO, __x); }
@@ -161,7 +166,7 @@ namespace std
#endif
#ifdef CONFIG_HAVE_LONG_DOUBLE
#if defined(CONFIG_HAVE_LONG_DOUBLE) && defined(FLT_EVAL_METHOD) && FLT_EVAL_METHOD == 0
using ::acosl;
using ::asinl;
using ::atanl;
@@ -192,7 +197,7 @@ namespace std
signbit(long double __x)
{ return __builtin_signbit(__x); }
constexpr int
constexpr int
fpclassify(long double __x)
{ return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL,
FP_SUBNORMAL, FP_ZERO, __x); }