libc/kernel/tools/defaults.py - android_bionic - Gitiles

 # All the defaults used to generate the cleaned-up uapi headers for bionic.

 # the list of include directories that belong to the kernel
 # tree. used when looking for sources...
 kernel_dirs = [ "linux", "asm", "asm-generic", "mtd" ]

 # a special value that is used to indicate that a given macro is known to be
 # undefined during optimization
 kCppUndefinedMacro = "<<<undefined>>>"

 # this is the set of known macros we want to totally optimize out from the
 # final headers
 kernel_known_macros = {
     "__KERNEL__": kCppUndefinedMacro,
     "__KERNEL_STRICT_NAMES":"1",
     "__CHECKER__": kCppUndefinedMacro,
     "__CHECK_ENDIAN__": kCppUndefinedMacro,
     "CONFIG_64BIT": "__LP64__",
     "CONFIG_X86_32": "__i386__",
     "__EXPORTED_HEADERS__": "1",
     "__HAVE_BUILTIN_BSWAP16__": "1",
     "__HAVE_BUILTIN_BSWAP32__": "1",
     "__HAVE_BUILTIN_BSWAP64__": "1",
     # Use this to remove the struct __kernel_old_timeval definition.
     # Otherwise, there will be two struct timeval definitions when
     # __kernel_old_timeval is renamed to timeval.
     "__kernel_old_timeval": "1",
     # Drop the custom byte swap functions and just use the clang builtins.
     # https://github.com/android/ndk/issues/2107
     "__arch_swab16": kCppUndefinedMacro,
     "__arch_swab16p": kCppUndefinedMacro,
     "__arch_swab16s": kCppUndefinedMacro,
     "__arch_swab32": kCppUndefinedMacro,
     "__arch_swab32p": kCppUndefinedMacro,
     "__arch_swab32s": kCppUndefinedMacro,
     "__arch_swab64": kCppUndefinedMacro,
     "__arch_swab64p": kCppUndefinedMacro,
     "__arch_swab64s": kCppUndefinedMacro,
     "__arch_swahb32": kCppUndefinedMacro,
     "__arch_swahb32p": kCppUndefinedMacro,
     "__arch_swahb32s": kCppUndefinedMacro,
     "__arch_swahw32": kCppUndefinedMacro,
     "__arch_swahw32p": kCppUndefinedMacro,
     "__arch_swahw32s": kCppUndefinedMacro,
     }

 # This is the set of known kernel data structures we want to remove from
 # the final headers. If the map value is non-empty, that means that in
 # addition to removing the structure, add a #include to the file.
 kernel_structs_to_remove = {
     # Remove these structures since they are still the same as
     # timeval, itimerval. Also, add an include of linux/time.h
     # since __kernel_old_timeval is being changed to timeval, and
     # is only present in linux/time.h.
     "__kernel_old_timeval": "linux/time.h",
     "__kernel_old_itimerval": None,
     # Replace all of the below structures with #include <bits/STRUCT.h>
     "__kernel_sockaddr_storage": "bits/sockaddr_storage.h",
     "epoll_event": "bits/epoll_event.h",
     "flock": "bits/flock.h",
     "flock64": "bits/flock64.h",
     "in_addr": "bits/in_addr.h",
     "ip_mreq_source": "bits/ip_mreq_source.h",
     "ip_msfilter": "bits/ip_msfilter.h",
     "tcphdr": "bits/tcphdr.h",
     "timespec": "bits/timespec.h",
     }

 # define to true if you want to remove all defined(CONFIG_FOO) tests
 # from the clean headers. testing shows that this is not strictly necessary
 # but just generates cleaner results
 kernel_remove_config_macros = True

 # Maps an architecture to a set of default macros that would be provided by
 # the toolchain's preprocessor. Currently only used to remove confusing
 # big-endian junk from the 32-bit arm headers.
 kernel_default_arch_macros = {
     "arm": {"__ARMEB__": kCppUndefinedMacro, "__ARM_EABI__": "1"},
     }

 # Replace tokens in the output according to this mapping.
 kernel_token_replacements = {
     # The kernel usage of __unused for unused struct fields conflicts with the macro defined in <sys/cdefs.h>.
     "__unused": "__linux_unused",
     # The kernel usage of C++ keywords causes problems for C++ code so rename.
     "class": "__linux_class",
     "private": "__linux_private",
     "virtual": "__linux_virtual",
     # The non-64 stuff is legacy; msqid64_ds/ipc64_perm is what userspace wants.
     "msqid_ds": "__kernel_legacy_msqid_ds",
     "semid_ds": "__kernel_legacy_semid_ds",
     "shmid_ds": "__kernel_legacy_shmid_ds",
     "ipc_perm": "__kernel_legacy_ipc_perm",
     # The kernel semun isn't usable (https://github.com/android-ndk/ndk/issues/400).
     "semun": "__kernel_legacy_semun",
     # The kernel's _NSIG/NSIG are one less than the userspace value, so we need to move them aside.
     "_NSIG": "_KERNEL__NSIG",
     "NSIG": "_KERNEL_NSIG",
     # The kernel's SIGRTMIN/SIGRTMAX are absolute limits; userspace steals a few.
     "SIGRTMIN": "__SIGRTMIN",
     "SIGRTMAX": "__SIGRTMAX",
     # We want to support both BSD and Linux member names in struct udphdr.
     "udphdr": "__kernel_udphdr",
     # This causes problems when trying to export the headers for the ndk.
     "__attribute_const__": "__attribute__((__const__))",
     # The kernel started using struct __kernel_old_timeval in some places,
     # which is the exact same as struct timeval. Replace that name with
     # timeval so that kernel structures all use the same named structure.
     # If struct __kernel_old_timeval and struct timeval become different,
     # then a different solution needs to be implemented.
     "__kernel_old_timeval": "timeval",
     # Do the same for __kernel_old_itimerval as for timeval.
     "__kernel_old_itimerval": "itimerval",
     # Do the same for __kernel_sockaddr_storage.
     "__kernel_sockaddr_storage": "sockaddr_storage",
     # Replace __packed with __attribute__((__packed__)) to avoid depending
     # on sys/cdefs.h
     "__packed": "__attribute__((__packed__))",
     # Remove unused macros (http://b/262917450).
     "__force": "",
     "__user": "",
     # Rename the kernel's sigaction so we can expose our POSIX one publicly,
     # but translate to the kernel's one internally.
     "sigaction": "__kernel_sigaction",
     }


 # Static inline functions that we want to keep.
 kernel_known_generic_statics = set(
         [
           "ipt_get_target",  # uapi/linux/netfilter_ipv4/ip_tables.h
           "ip6t_get_target", # uapi/linux/netfilter_ipv6/ip6_tables.h
           # Byte swapping inlines from uapi/linux/swab.h
           # The below functions are the ones we are guaranting we export.
           "__swab16",
           "__swab32",
           "__swab64",
           "__swab16p",
           "__swab32p",
           "__swab64p",
           "__swab16s",
           "__swab32s",
           "__swab64s",
           "__swahw32",
           "__swahb32",
           "__swahw32p",
           "__swahb32p",
           "__swahw32s",
           "__swahb32s",
           # These are required to support the above functions.
           "__fswahw32",
           "__fswahb32",
           # This is used by various macros in <linux/ioprio.h>.
           "ioprio_value",

           # Contact opensource-licensing@ before adding to this set.
         ]
     )
	# All the defaults used to generate the cleaned-up uapi headers for bionic.

	# the list of include directories that belong to the kernel
	# tree. used when looking for sources...
	kernel_dirs = [ "linux", "asm", "asm-generic", "mtd" ]

	# a special value that is used to indicate that a given macro is known to be
	# undefined during optimization
	kCppUndefinedMacro = "<<<undefined>>>"

	# this is the set of known macros we want to totally optimize out from the
	# final headers
	kernel_known_macros = {
	"__KERNEL__": kCppUndefinedMacro,
	"__KERNEL_STRICT_NAMES":"1",
	"__CHECKER__": kCppUndefinedMacro,
	"__CHECK_ENDIAN__": kCppUndefinedMacro,
	"CONFIG_64BIT": "__LP64__",
	"CONFIG_X86_32": "__i386__",
	"__EXPORTED_HEADERS__": "1",
	"__HAVE_BUILTIN_BSWAP16__": "1",
	"__HAVE_BUILTIN_BSWAP32__": "1",
	"__HAVE_BUILTIN_BSWAP64__": "1",
	# Use this to remove the struct __kernel_old_timeval definition.
	# Otherwise, there will be two struct timeval definitions when
	# __kernel_old_timeval is renamed to timeval.
	"__kernel_old_timeval": "1",
	# Drop the custom byte swap functions and just use the clang builtins.
	# https://github.com/android/ndk/issues/2107
	"__arch_swab16": kCppUndefinedMacro,
	"__arch_swab16p": kCppUndefinedMacro,
	"__arch_swab16s": kCppUndefinedMacro,
	"__arch_swab32": kCppUndefinedMacro,
	"__arch_swab32p": kCppUndefinedMacro,
	"__arch_swab32s": kCppUndefinedMacro,
	"__arch_swab64": kCppUndefinedMacro,
	"__arch_swab64p": kCppUndefinedMacro,
	"__arch_swab64s": kCppUndefinedMacro,
	"__arch_swahb32": kCppUndefinedMacro,
	"__arch_swahb32p": kCppUndefinedMacro,
	"__arch_swahb32s": kCppUndefinedMacro,
	"__arch_swahw32": kCppUndefinedMacro,
	"__arch_swahw32p": kCppUndefinedMacro,
	"__arch_swahw32s": kCppUndefinedMacro,
	}

	# This is the set of known kernel data structures we want to remove from
	# the final headers. If the map value is non-empty, that means that in
	# addition to removing the structure, add a #include to the file.
	kernel_structs_to_remove = {
	# Remove these structures since they are still the same as
	# timeval, itimerval. Also, add an include of linux/time.h
	# since __kernel_old_timeval is being changed to timeval, and
	# is only present in linux/time.h.
	"__kernel_old_timeval": "linux/time.h",
	"__kernel_old_itimerval": None,
	# Replace all of the below structures with #include <bits/STRUCT.h>
	"__kernel_sockaddr_storage": "bits/sockaddr_storage.h",
	"epoll_event": "bits/epoll_event.h",
	"flock": "bits/flock.h",
	"flock64": "bits/flock64.h",
	"in_addr": "bits/in_addr.h",
	"ip_mreq_source": "bits/ip_mreq_source.h",
	"ip_msfilter": "bits/ip_msfilter.h",
	"tcphdr": "bits/tcphdr.h",
	"timespec": "bits/timespec.h",
	}

	# define to true if you want to remove all defined(CONFIG_FOO) tests
	# from the clean headers. testing shows that this is not strictly necessary
	# but just generates cleaner results
	kernel_remove_config_macros = True

	# Maps an architecture to a set of default macros that would be provided by
	# the toolchain's preprocessor. Currently only used to remove confusing
	# big-endian junk from the 32-bit arm headers.
	kernel_default_arch_macros = {
	"arm": {"__ARMEB__": kCppUndefinedMacro, "__ARM_EABI__": "1"},
	}

	# Replace tokens in the output according to this mapping.
	kernel_token_replacements = {
	# The kernel usage of __unused for unused struct fields conflicts with the macro defined in <sys/cdefs.h>.
	"__unused": "__linux_unused",
	# The kernel usage of C++ keywords causes problems for C++ code so rename.
	"class": "__linux_class",
	"private": "__linux_private",
	"virtual": "__linux_virtual",
	# The non-64 stuff is legacy; msqid64_ds/ipc64_perm is what userspace wants.
	"msqid_ds": "__kernel_legacy_msqid_ds",
	"semid_ds": "__kernel_legacy_semid_ds",
	"shmid_ds": "__kernel_legacy_shmid_ds",
	"ipc_perm": "__kernel_legacy_ipc_perm",
	# The kernel semun isn't usable (https://github.com/android-ndk/ndk/issues/400).
	"semun": "__kernel_legacy_semun",
	# The kernel's _NSIG/NSIG are one less than the userspace value, so we need to move them aside.
	"_NSIG": "_KERNEL__NSIG",
	"NSIG": "_KERNEL_NSIG",
	# The kernel's SIGRTMIN/SIGRTMAX are absolute limits; userspace steals a few.
	"SIGRTMIN": "__SIGRTMIN",
	"SIGRTMAX": "__SIGRTMAX",
	# We want to support both BSD and Linux member names in struct udphdr.
	"udphdr": "__kernel_udphdr",
	# This causes problems when trying to export the headers for the ndk.
	"__attribute_const__": "__attribute__((__const__))",
	# The kernel started using struct __kernel_old_timeval in some places,
	# which is the exact same as struct timeval. Replace that name with
	# timeval so that kernel structures all use the same named structure.
	# If struct __kernel_old_timeval and struct timeval become different,
	# then a different solution needs to be implemented.
	"__kernel_old_timeval": "timeval",
	# Do the same for __kernel_old_itimerval as for timeval.
	"__kernel_old_itimerval": "itimerval",
	# Do the same for __kernel_sockaddr_storage.
	"__kernel_sockaddr_storage": "sockaddr_storage",
	# Replace __packed with __attribute__((__packed__)) to avoid depending
	# on sys/cdefs.h
	"__packed": "__attribute__((__packed__))",
	# Remove unused macros (http://b/262917450).
	"__force": "",
	"__user": "",
	# Rename the kernel's sigaction so we can expose our POSIX one publicly,
	# but translate to the kernel's one internally.
	"sigaction": "__kernel_sigaction",
	}


	# Static inline functions that we want to keep.
	kernel_known_generic_statics = set(
	[
	"ipt_get_target", # uapi/linux/netfilter_ipv4/ip_tables.h
	"ip6t_get_target", # uapi/linux/netfilter_ipv6/ip6_tables.h
	# Byte swapping inlines from uapi/linux/swab.h
	# The below functions are the ones we are guaranting we export.
	"__swab16",
	"__swab32",
	"__swab64",
	"__swab16p",
	"__swab32p",
	"__swab64p",
	"__swab16s",
	"__swab32s",
	"__swab64s",
	"__swahw32",
	"__swahb32",
	"__swahw32p",
	"__swahb32p",
	"__swahw32s",
	"__swahb32s",
	# These are required to support the above functions.
	"__fswahw32",
	"__fswahb32",
	# This is used by various macros in <linux/ioprio.h>.
	"ioprio_value",

	# Contact opensource-licensing@ before adding to this set.
	]
	)