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Improve check for incomplete <execution> header #1342

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Merged
mborland merged 2 commits into from
Dec 18, 2025
+6 −2
Merged

Improve check for incomplete <execution> header #1342

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9267c0a
Improve check for incomplete <execution> header
mbs-c Dec 9, 2025
f31a06e
Only include <version> if it exists
mbs-c Dec 18, 2025
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8 changes: 6 additions & 2 deletions include/boost/math/tools/config.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -84,6 +84,10 @@

#else // Things from boost/config that are required, and easy to replicate

#if __has_include(<version>)
#include <version>
#endif

#define BOOST_MATH_PREVENT_MACRO_SUBSTITUTION
#define BOOST_MATH_NO_REAL_CONCEPT_TESTS
#define BOOST_MATH_NO_DISTRIBUTION_CONCEPT_TESTS
Expand All @@ -102,9 +106,9 @@
#if ((__cplusplus > 201700L) || (defined(_MSVC_LANG) && (_MSVC_LANG > 201700L)))
#define BOOST_MATH_IF_CONSTEXPR if constexpr

// Clang on mac provides the execution header with none of the functionality. TODO: Check back on this
// libc++ currently provides the execution header with none of the functionality.
// https://en.cppreference.com/w/cpp/compiler_support "Standardization of Parallelism TS"
# if !__has_include(<execution>) || (defined(__APPLE__) && defined(__clang__))
# if !__has_include(<execution>) || !defined(__cpp_lib_execution) || (__cpp_lib_execution < 201603L)
# define BOOST_MATH_NO_CXX17_HDR_EXECUTION
# endif
#else
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