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- # Definition of features which introduce new libc ABI versions. This
- # file is used to create a header file with definitions for the various
- # versions. The static linker will encode in the EI_ABIVERSION field in
- # the e_ident array in the ELF program header the required ABI version.
- # This is not a bitmask. The maximum ABI version required must be
- # encoded.
- #
- # Adding new features should always happen by appending new lines. Never
- # add entries in the middle or where they seem "logical". Once a version
- # is assigned to a feature it must not change again. Since some features
- # are conditionally added this can only ever be done securely without much
- # risk is by adding at the end.
- #
- # The following lines have one of two formats:
- #
- # SYMBOL
- # With just a symbol on the line this is the name of a feature which
- # is architecture independent.
- #
- # SYMBOL PLATFORM
- # Using this form architecture (and platform) dependent features can be
- # specified. The PLATFORM name can use the wildcards available in
- # the Bourne shell's case expression.
- #
- # Note that the same symbol can be used using different platform triples.
- # They don't have to be in the same order relative to other entries. This
- # can happen if the feature is implemented for different architectures
- # at different times.
- #
- # This file is parsed by a script which produces a header file containing
- # a single enum definition. An extra symbol is added as entry zero to
- # specify the default ABI with number 0 and an artificial last entry is
- # added to allow computing the maximum ABI version for the platform.
- #
- # Feature Name Configuration
- # ------------ -------------
- #
- # Unique symbol definitions for C++.
- # Architecture independent, all ELF targets (== all targets)
- UNIQUE
- #
- # Indirect PLT relocations. Architecture dependent.
- IFUNC x86_64-*-linux*
- IFUNC i?86-*-linux*
- IFUNC powerpc64-*-linux*
- IFUNC powerpc-*-linux*
- IFUNC sparc64-*-linux*
- IFUNC sparc-*-linux*
- # Absolute (SHN_ABS) symbols working correctly.
- ABSOLUTE
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