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Fix compilation on clang-21 / libc++-21 (#4477)

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`<cstdlib>` was not being included, so malloc and free were only declared
via transitive includes. Some includes changed in the latest libc++-21
build which broke fmt.

Also changed `malloc`/`free` to `std::malloc` and `std::free`, as
putting those symbols in the global namespace is optional for the
implementation when including `<cstdlib>`.
This commit is contained in:
Remy Jette
2025-06-21 07:28:14 -07:00
committed by GitHub
parent 1ef8348070
commit f4345467fc
1 changed files with 3 additions and 2 deletions
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5
include/fmt/format.h
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@ -44,6 +44,7 @@
# include <cmath> // std::signbit
# include <cstddef> // std::byte
# include <cstdint> // uint32_t
# include <cstdlib> // std::malloc, std::free
# include <cstring> // std::memcpy
# include <limits> // std::numeric_limits
# include <new> // std::bad_alloc
@ -755,12 +756,12 @@ template <typename T> struct allocator : private std::decay<void> {
T* allocate(size_t n) {
FMT_ASSERT(n <= max_value<size_t>() / sizeof(T), "");
T* p = static_cast<T*>(malloc(n * sizeof(T)));
T* p = static_cast<T*>(std::malloc(n * sizeof(T)));
if (!p) FMT_THROW(std::bad_alloc());
return p;
}
void deallocate(T* p, size_t) { free(p); }
void deallocate(T* p, size_t) { std::free(p); }
};
} // namespace detail