diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2026-01-02 20:32:05 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2026-05-29 22:57:31 +0000 |
| commit | 6960284840f8178cb86e359da3b2d4cbe1581b23 (patch) | |
| tree | 0c973a2d6062592fa17696a8e545079fd0cf7426 | |
| parent | 030fd7fb65c38d889f1dd6f81cb2971de5a09e5d (diff) | |
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
(cherry picked from commit 718e5874be0306ea302fd2b8e1d97fc79682abbe)
| -rw-r--r-- | contrib/llvm-project/libc/include/llvm-libc-macros/float-macros.h | 5 |
1 files changed, 5 insertions, 0 deletions
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_DIG |