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[flang] Fix POSIX.1/XPG checks in intrinsics-library.cpp #201072

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Merged
rorth merged 4 commits into from
Jul 30, 2026
Merged

[flang] Fix POSIX.1/XPG checks in intrinsics-library.cpp #201072

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1aad7df
[flang] Fix POSIX.1/XPG checks in intrinsics-library.cpp
rorth Jun 2, 2026
58fa090
Check both `_POSIX_C_SOURCE` and `_POSIX_VERSION`, `_XOPEN_SOURCE` an…
rorth Jun 2, 2026
56a8100
Fix POSIX.1/XPG check.
rorth Jul 30, 2026
9485992
Don't include <unistd.h> on Windows.
rorth Jul 30, 2026
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111 changes: 57 additions & 54 deletions flang/lib/Evaluate/intrinsics-library.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,9 @@
#include "flang/Common/float128.h"
#include "flang/Common/float80.h"
#include <type_traits>
#ifndef _WIN32
#include <unistd.h> // _POSIX_VERSION, _XOPEN_VERSION
#endif

namespace Fortran::evaluate {

Expand Down Expand Up @@ -440,7 +443,7 @@ struct HostRuntimeLibrary<std::complex<double>, LibraryVersion::Libm> {
// clang libc++ (ok in GNU libstdc++). Instead, the Posix libm
// extensions are used when available below.

#if _POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600
#if _POSIX_VERSION >= 200112L || _XOPEN_VERSION >= 600
/// Define libm extensions
/// Bessel functions are defined in POSIX.1-2001.

Expand All @@ -460,7 +463,58 @@ template <> struct HostRuntimeLibrary<float, LibraryVersion::LibmExtensions> {
static constexpr HostRuntimeMap map{table};
static_assert(map.Verify(), "map must be sorted");
};
#endif
#endif // !_AIX && !__APPLE__

template <> struct HostRuntimeLibrary<double, LibraryVersion::LibmExtensions> {
using F = FuncPointer<double, double>;
using FN = FuncPointer<double, int, double>;
static constexpr HostRuntimeFunction table[]{
FolderFactory<F, F{::j0}>::Create("bessel_j0"),
FolderFactory<F, F{::j1}>::Create("bessel_j1"),
FolderFactory<FN, FN{::jn}>::Create("bessel_jn"),
FolderFactory<F, F{::y0}>::Create("bessel_y0"),
FolderFactory<F, F{::y1}>::Create("bessel_y1"),
FolderFactory<FN, FN{::yn}>::Create("bessel_yn"),
};
static constexpr HostRuntimeMap map{table};
static_assert(map.Verify(), "map must be sorted");
};

#if defined(__GLIBC__) && (HAS_FLOAT80 || HAS_LDBL128)
template <>
struct HostRuntimeLibrary<long double, LibraryVersion::LibmExtensions> {
using F = FuncPointer<long double, long double>;
using FN = FuncPointer<long double, int, long double>;
static constexpr HostRuntimeFunction table[]{
FolderFactory<F, F{::j0l}>::Create("bessel_j0"),
FolderFactory<F, F{::j1l}>::Create("bessel_j1"),
FolderFactory<FN, FN{::jnl}>::Create("bessel_jn"),
FolderFactory<F, F{::y0l}>::Create("bessel_y0"),
FolderFactory<F, F{::y1l}>::Create("bessel_y1"),
FolderFactory<FN, FN{::ynl}>::Create("bessel_yn"),
};
static constexpr HostRuntimeMap map{table};
static_assert(map.Verify(), "map must be sorted");
};
#endif // __GLIBC__ && (HAS_FLOAT80 || HAS_LDBL128)
#endif // _POSIX_VERSION >= 200112L || _XOPEN_VERSION >= 600

#ifdef _WIN32
template <> struct HostRuntimeLibrary<double, LibraryVersion::LibmExtensions> {
using F = FuncPointer<double, double>;
using FN = FuncPointer<double, int, double>;
static constexpr HostRuntimeFunction table[]{
FolderFactory<F, F{::_j0}>::Create("bessel_j0"),
FolderFactory<F, F{::_j1}>::Create("bessel_j1"),
FolderFactory<FN, FN{::_jn}>::Create("bessel_jn"),
FolderFactory<F, F{::_y0}>::Create("bessel_y0"),
FolderFactory<F, F{::_y1}>::Create("bessel_y1"),
FolderFactory<FN, FN{::_yn}>::Create("bessel_yn"),
};
static constexpr HostRuntimeMap map{table};
static_assert(map.Verify(), "map must be sorted");
};
#endif // _WIN32

#if HAS_QUADMATHLIB
template <> struct HostRuntimeLibrary<__float128, LibraryVersion::Libm> {
Expand Down Expand Up @@ -523,58 +577,7 @@ template <> struct HostRuntimeLibrary<__complex128, LibraryVersion::Libm> {
static constexpr HostRuntimeMap map{table};
static_assert(map.Verify(), "map must be sorted");
};
#endif

template <> struct HostRuntimeLibrary<double, LibraryVersion::LibmExtensions> {
using F = FuncPointer<double, double>;
using FN = FuncPointer<double, int, double>;
static constexpr HostRuntimeFunction table[]{
FolderFactory<F, F{::j0}>::Create("bessel_j0"),
FolderFactory<F, F{::j1}>::Create("bessel_j1"),
FolderFactory<FN, FN{::jn}>::Create("bessel_jn"),
FolderFactory<F, F{::y0}>::Create("bessel_y0"),
FolderFactory<F, F{::y1}>::Create("bessel_y1"),
FolderFactory<FN, FN{::yn}>::Create("bessel_yn"),
};
static constexpr HostRuntimeMap map{table};
static_assert(map.Verify(), "map must be sorted");
};

#if defined(__GLIBC__) && (HAS_FLOAT80 || HAS_LDBL128)
template <>
struct HostRuntimeLibrary<long double, LibraryVersion::LibmExtensions> {
using F = FuncPointer<long double, long double>;
using FN = FuncPointer<long double, int, long double>;
static constexpr HostRuntimeFunction table[]{
FolderFactory<F, F{::j0l}>::Create("bessel_j0"),
FolderFactory<F, F{::j1l}>::Create("bessel_j1"),
FolderFactory<FN, FN{::jnl}>::Create("bessel_jn"),
FolderFactory<F, F{::y0l}>::Create("bessel_y0"),
FolderFactory<F, F{::y1l}>::Create("bessel_y1"),
FolderFactory<FN, FN{::ynl}>::Create("bessel_yn"),
};
static constexpr HostRuntimeMap map{table};
static_assert(map.Verify(), "map must be sorted");
};
#endif // HAS_FLOAT80 || HAS_LDBL128
#endif //_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600

#ifdef _WIN32
template <> struct HostRuntimeLibrary<double, LibraryVersion::LibmExtensions> {
using F = FuncPointer<double, double>;
using FN = FuncPointer<double, int, double>;
static constexpr HostRuntimeFunction table[]{
FolderFactory<F, F{::_j0}>::Create("bessel_j0"),
FolderFactory<F, F{::_j1}>::Create("bessel_j1"),
FolderFactory<FN, FN{::_jn}>::Create("bessel_jn"),
FolderFactory<F, F{::_y0}>::Create("bessel_y0"),
FolderFactory<F, F{::_y1}>::Create("bessel_y1"),
FolderFactory<FN, FN{::_yn}>::Create("bessel_yn"),
};
static constexpr HostRuntimeMap map{table};
static_assert(map.Verify(), "map must be sorted");
};
#endif
#endif // HAS_QUADMATHLIB

/// Define pgmath description
#if LINK_WITH_LIBPGMATH
Expand Down
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