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This patch adds a new macro, libm_alias_finite, to define all _finite symbol. It sets all _finite symbol as compat symbol based on its first version (obtained from the definition at built generated first-versions.h). The <fn>f128_finite symbols were introduced in GLIBC 2.26 and so need special treatment in code that is shared between long double and float128. It is done by adding a list, similar to internal symbol redifinition, on sysdeps/ieee754/float128/float128_private.h. Alpha also needs some tricky changes to ensure we still emit 2 compat symbols for sqrt(f). Passes buildmanyglibc. Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
/* Finite math compatibility macros.
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Copyright (C) 2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _LIBM_ALIAS_FINITE_H
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#define _LIBM_ALIAS_FINITE_H
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#include <first-versions.h>
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#include <shlib-compat.h>
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/* The -ffinite-math symbols were added on GLIBC 2.15 and moved to compat
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symbol so newer architectures do not require to support it. */
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#if SHLIB_COMPAT (libm, GLIBC_2_15, GLIBC_2_31)
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# define libm_alias_finite(from, to) \
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libm_alias_finite1(from, to)
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# define libm_alias_finite1(from, to) \
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compat_symbol (libm, \
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from, \
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to ## _finite, \
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FIRST_VERSION_libm_ ## to ## _finite);
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#else
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# define libm_alias_finite(from, to)
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#endif
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#endif
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