Date: Sat, 25 Apr 2026 14:20:03 +0000 From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: 718e5874be03 - main - llvm-libc-macros: work around gcc defining LDBL_MANT_DIG as 53 on i386 Message-ID: <69eccd93.37ac5.26148e96@gitrepo.freebsd.org>
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The branch main has been updated by dim: URL: https://cgit.FreeBSD.org/src/commit/?id=718e5874be0306ea302fd2b8e1d97fc79682abbe commit 718e5874be0306ea302fd2b8e1d97fc79682abbe Author: Dimitry Andric <dim@FreeBSD.org> AuthorDate: 2026-01-02 20:32:05 +0000 Commit: Dimitry Andric <dim@FreeBSD.org> CommitDate: 2026-04-25 14:14:11 +0000 llvm-libc-macros: work around gcc defining LDBL_MANT_DIG as 53 on i386 Otherwise, gcc will not be able to compile parts of libc++ 21 in -m32 mode, resulting in errors similar to: In file included from /usr/src/contrib/llvm-project/libc/shared/str_to_float.h:13, from /usr/src/contrib/llvm-project/libcxx/src/include/from_chars_floating_point.h:14, from /usr/src/contrib/llvm-project/libcxx/src/charconv.cpp:12: /usr/src/contrib/llvm-project/libc/src/__support/str_to_float.h: In function 'void __llvm_libc::internal::set_implicit_bit(__llvm_libc::fputil::FPBits<T>&) [with T = long double]': /usr/src/contrib/llvm-project/libc/src/__support/str_to_float.h:77:10: error: 'struct __llvm_libc::fputil::FPBits<long double>' has no member named 'set_implicit_bit' 77 | result.set_implicit_bit(result.get_biased_exponent() != 0); | ^~~~~~~~~~~~~~~~ PR: 292067 MFC after: 1 month --- contrib/llvm-project/libc/include/llvm-libc-macros/float-macros.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/contrib/llvm-project/libc/include/llvm-libc-macros/float-macros.h b/contrib/llvm-project/libc/include/llvm-libc-macros/float-macros.h index a25ef60a293d..3bf92bc7b6c9 100644 --- a/contrib/llvm-project/libc/include/llvm-libc-macros/float-macros.h +++ b/contrib/llvm-project/libc/include/llvm-libc-macros/float-macros.h @@ -61,6 +61,11 @@ #define DBL_MANT_DIG __DBL_MANT_DIG__ #endif // DBL_MANT_DIG +// Kludge for gcc defining LDBL_MANT_DIG as 53 on i386 +#if defined(LDBL_MANT_DIG) && defined(__GNUC__) && !defined(__clang__) && defined(__i386__) +#undef LDBL_MANT_DIG +#endif + #ifndef LDBL_MANT_DIG #define LDBL_MANT_DIG __LDBL_MANT_DIG__ #endif // LDBL_MANT_DIGhome | help
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