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45 lines
1.8 KiB
Plaintext
45 lines
1.8 KiB
Plaintext
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# Definition of features which introduce new libc ABI versions. This
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# file is used to create a header file with definitions for the various
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# versions. The static linker will encode in the EI_ABIVERSION field in
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# the e_ident array in the ELF program header the required ABI version.
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# This is not a bitmask. The maximum ABI version required must be
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# encoded.
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#
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# Adding new features should always happen by appending new lines. Never
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# add entries in the middle or where they seem "logical". Once a version
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# is assigned to a feature it must not change again. Since some features
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# are conditionally added this can only ever be done securely without much
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# risk is by adding at the end.
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#
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# The following lines have one of two formats:
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#
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# SYMBOL
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# With just a symbol on the line this is the name of a feature which
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# is architecture independent.
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#
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# SYMBOL PLATFORM
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# Using this form architecture (and platform) dependent features can be
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# specified. The PLATFORM name can use the wildcards available in
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# the Bourne shell's case expression.
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#
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# Note that the same symbol can be used using different platform triples.
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# They don't have to be in the same order relative to other entries. This
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# can happen if the feature is implemented for different architectures
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# at different times.
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#
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# This file is parsed by a script which produces a header file containing
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# a single enum definition. An extra symbol is added as entry zero to
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# specify the default ABI with number 0 and an artificial last entry is
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# added to allow computing the maximum ABI version for the platform.
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#
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# Feature Name Configuration
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# ------------ -------------
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#
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# Unique symbol definitions for C++.
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# Architecture independent, all ELF targets (== all targets)
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UNIQUE
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#
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# Indirect PLT relocations. Architecture dependent.
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IFUNC x86_64-*-linux*
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IFUNC i?86-*-linux*
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