configure.ac - platform/external/strace - Gitiles

 # Configure template for strace.
 #
 # Copyright (c) 1999-2001 Wichert Akkerman <wichert@deephackmode.org>
 # Copyright (c) 2002-2009 Roland McGrath <roland@redhat.com>
 # Copyright (c) 2006-2016 Dmitry V. Levin <ldv@altlinux.org>
 # Copyright (c) 2008-2015 Mike Frysinger <vapier@gentoo.org>
 # Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1. Redistributions of source code must retain the above copyright
 #    notice, this list of conditions and the following disclaimer.
 # 2. Redistributions in binary form must reproduce the above copyright
 #    notice, this list of conditions and the following disclaimer in the
 #    documentation and/or other materials provided with the distribution.
 # 3. The name of the author may not be used to endorse or promote products
 #    derived from this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 AC_PREREQ(2.57)
 AC_INIT([strace],
 	m4_esyscmd([./git-version-gen .tarball-version]),
 	[strace-devel@lists.sourceforge.net])
 AC_CONFIG_SRCDIR([strace.c])
 AC_CONFIG_AUX_DIR([.])
 AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE([foreign nostdinc dist-xz no-dist-gzip silent-rules parallel-tests])
 AM_MAINTAINER_MODE
 AC_CANONICAL_HOST

 AC_PROG_CC
 AC_PROG_CPP
 AX_PROG_CC_FOR_BUILD
 AC_PROG_INSTALL
 AC_PROG_RANLIB

 AC_USE_SYSTEM_EXTENSIONS
 AX_CODE_COVERAGE

 AC_MSG_CHECKING([for supported architecture])
 arch_m32=
 arch_mx32=
 case "$host_cpu" in
 bfin)
 	arch=bfin
 	AC_DEFINE([BFIN], 1, [Define for the Blackfin architecture.])
 	;;
 i[[3456]]86|pentium)
 	arch=i386
 	AC_DEFINE([I386], 1, [Define for the i386 architecture.])
 	;;
 ia64)
 	arch=ia64
 	AC_DEFINE([IA64], 1, [Define for the IA64 architecture.])
 	;;
 m68k)
 	arch=m68k
 	AC_DEFINE([M68K], 1, [Define for the m68k architecture.])
 	;;
 sparc64*)
 	arch=sparc64
 	arch_m32=sparc
 	AC_DEFINE([SPARC64], 1, [Define for the SPARC64 architecture.])
 	;;
 sparc*)
 	arch=sparc
 	AC_DEFINE([SPARC], 1, [Define for the SPARC architecture.])
 	;;
 metag*)
 	arch=metag
 	AC_DEFINE([METAG], 1, [Define for the Meta architecture.])
 	;;
 mips*)
 	arch=mips
 	AC_DEFINE([MIPS], 1, [Define for the MIPS architecture.])
 	;;
 alpha*)
 	arch=alpha
 	AC_DEFINE([ALPHA], 1, [Define for the Alpha architecture.])
 	;;
 powerpc*)
 	AC_DEFINE([POWERPC], 1, [Define for the PowerPC architecture.])
 	AC_TRY_COMPILE(
 [#ifndef __LP64__
 # error 32 bit
 #endif], [], arch=powerpc64, arch=powerpc)
 	if test "$arch" = "powerpc64"; then
 		arch_m32=powerpc
 		AC_DEFINE([POWERPC64], 1, [Define for the PowerPC64 architecture.])
 	fi
 	;;
 arm*)
 	arch=arm
 	AC_DEFINE([ARM], 1, [Define for the ARM architecture.])
 	;;
 aarch64*)
 	arch=aarch64
 	arch_m32=arm
 	AC_DEFINE([AARCH64], 1, [Define for the AArch64 architecture.])
 	;;
 avr32*)
 	arch=avr32
 	AC_DEFINE([AVR32], 1, [Define for the AVR32 architecture.])
 	;;
 arc*)
 	arch=arc
 	AC_DEFINE([ARC], 1, [Define for the ARC architecture.])
 	;;
 s390)
 	arch=s390
 	AC_DEFINE([S390], 1, [Define for the S390 architecture.])
 	;;
 s390x)
 	arch=s390x
 	AC_DEFINE([S390X], 1, [Define for the S390x architecture.])
 	;;
 hppa*|parisc*)
 	arch=hppa
 	AC_DEFINE([HPPA], 1, [Define for the HPPA architecture.])
 	;;
 sh64*)
 	arch=sh64
 	AC_DEFINE([SH64], 1, [Define for the SH64 architecture.])
 	;;
 sh*)
 	arch=sh
 	AC_DEFINE([SH], 1, [Define for the SH architecture.])
 	;;
 x86?64*)
 	arch_m32=i386
 	AC_TRY_COMPILE(
 [#ifndef __ILP32__
 # error not x32
 #endif], [], arch=x32, arch=x86_64)
 	if test "$arch" = "x86_64"; then
 		arch_mx32=x32
 		AC_DEFINE([X86_64], 1, [Define for the 64bit AMD x86-64 architecture.])
 	else
 		AC_DEFINE([X32], 1, [Define for the 32bit AMD x86-64 architecture.])
 	fi
 	;;
 cris|crisv10)
 	arch=crisv10
 	AC_DEFINE([CRISV10], 1, [Define for the CRISv10 architecture.])
 	;;
 crisv32)
 	arch=crisv32
 	AC_DEFINE([CRISV32], 1, [Define for the CRISv32 architecture.])
 	;;
 tile*)
 	arch=tile
 	AC_DEFINE([TILE], 1, [Define for the Tile architecture])
 	;;
 microblaze*)
 	arch=microblaze
 	AC_DEFINE([MICROBLAZE], 1, [Define for the MicroBlaze architecture.])
 	;;
 nios2*)
 	arch=nios2
 	AC_DEFINE([NIOS2], 1, [Define for the Nios-II architecture.])
 	;;

 or1k*)
 	arch=or1k
 	AC_DEFINE([OR1K], 1, [Define for the OpenRISC 1000 architecture.])
 	;;

 xtensa*)
 	arch=xtensa
 	AC_DEFINE([XTENSA], 1, [Define for the Xtensa architecture])
 	;;

 *)
 	AC_MSG_RESULT([NO!])
 	AC_MSG_ERROR([architecture $host_cpu is not supported by strace])
 	;;
 esac
 AC_MSG_RESULT($arch)

 test -n "$arch_m32" ||
 	arch_m32=$arch
 test -n "$arch_mx32" ||
 	arch_mx32=$arch
 AC_SUBST(arch)
 AC_SUBST(arch_m32)
 AC_SUBST(arch_mx32)

 if test "$arch" = mips; then
 	AC_CACHE_CHECK([for _MIPS_SIM], [st_cv__MIPS_SIM],
 		       [AC_COMPUTE_INT([st_cv__MIPS_SIM], [_MIPS_SIM],
 				       [#include <sgidefs.h>],
 				       [AC_MSG_ERROR([_MIPS_SIM cannot be determined])])])

 	AC_CACHE_CHECK([for MIPS ABI], [st_cv_mips_abi],
 		[AC_COMPILE_IFELSE(
 			[AC_LANG_PROGRAM([[#include <sgidefs.h>]],
 					 [[int i[_MIPS_SIM == _MIPS_SIM_ABI32 ? 1 : - 1];]])],
 			[st_cv_mips_abi=o32],
 		[AC_COMPILE_IFELSE(
 			[AC_LANG_PROGRAM([[#include <sgidefs.h>]],
 					 [[int i[_MIPS_SIM == _MIPS_SIM_NABI32 ? 1 : - 1];]])],
 			[st_cv_mips_abi=n32],
 		[AC_COMPILE_IFELSE(
 			[AC_LANG_PROGRAM([[#include <sgidefs.h>]],
 					 [[int i[_MIPS_SIM == _MIPS_SIM_ABI64 ? 1 : - 1];]])],
 			[st_cv_mips_abi=n64],
 			[st_cv_mips_abi=unknown])])])])

 	case "$st_cv_mips_abi" in
 		o32) AC_DEFINE([LINUX_MIPSO32], [1], [Define for _MIPS_SIM_ABI32.]);;
 		n32) AC_DEFINE([LINUX_MIPSN32], [1], [Define for _MIPS_SIM_NABI32.]);;
 		n64) AC_DEFINE([LINUX_MIPSN64], [1], [Define for _MIPS_SIM_ABI64.]);;
 		*) AC_MSG_ERROR([Unsupported _MIPS_SIM]);;
 	esac
 fi

 AC_ARG_ENABLE([arm-oabi],
 	      [AS_HELP_STRING([--enable-arm-oabi],
 			      [enable OABI support on ARM EABI])],
 	      [], [enable_arm_oabi=no])
 case "$enable_arm_oabi" in
 	yes) enable_arm_oabi=1 ;;
 	no) enable_arm_oabi=0 ;;
 	*) AC_MSG_ERROR([bad value $enable_arm_oabi for arm-oabi option]) ;;
 esac
 AC_DEFINE_UNQUOTED([ENABLE_ARM_OABI], [$enable_arm_oabi],
 		   [Define to 1 if you want OABI support on ARM EABI.])

 gl_WARN_ADD([-Wall])
 gl_WARN_ADD([-Wwrite-strings])
 gl_WARN_ADD([-Wsign-compare])
 AC_ARG_ENABLE([gcc-Werror],
   [AS_HELP_STRING([--enable-gcc-Werror], [turn on gcc's -Werror option])],
   [case $enableval in
      yes) gl_WARN_ADD([-Werror]) ;;
      no)  ;;
      *)   AC_MSG_ERROR([bad value $enableval for gcc-Werror option]) ;;
    esac]
 )
 AC_SUBST([WARN_CFLAGS])

 AC_C_BIGENDIAN
 AC_C_CONST
 AC_C_TYPEOF

 AC_TYPE_GETGROUPS
 AC_TYPE_MODE_T
 AC_TYPE_SIGNAL
 AC_TYPE_UID_T

 AC_HEADER_DIRENT
 AC_HEADER_MAJOR
 AC_HEADER_STAT
 AC_HEADER_STDBOOL
 AC_HEADER_STDC

 AC_CHECK_FUNCS(m4_normalize([
 	fanotify_mark
 	fopen64
 	fork
 	fputs_unlocked
 	fstatat
 	ftruncate
 	futimens
 	if_indextoname
 	inet_ntop
 	inet_pton
 	pipe2
 	prctl
 	preadv
 	process_vm_readv
 	pwritev
 	recvmmsg
 	sendmmsg
 	sigaction
 	signalfd
 	stpcpy
 	strerror
 	strsignal
 	sync_file_range
 	utimensat
 ]))

 AC_CHECK_TYPES([sig_atomic_t, struct sigcontext],,, [#include <signal.h>])

 AC_CHECK_TYPES([struct mmsghdr],,, [#include <sys/socket.h>])

 AC_CHECK_TYPES([__kernel_long_t, __kernel_ulong_t],,,
 [#include <asm/posix_types.h>])

 AC_CHECK_TYPES([struct stat64, struct __old_kernel_stat],,,
 [#include <sys/types.h>
 #include <asm/stat.h>])

 AC_CHECK_TYPES(m4_normalize([
 	struct pt_all_user_regs,
 	struct ia64_fpreg,
 	struct ptrace_peeksiginfo_args
 ]),,, [#include <sys/ptrace.h>])

 AC_CHECK_TYPES(m4_normalize([
 	struct flock,
 	struct flock64,
 	struct __kernel_flock,
 	struct __kernel_flock64
 ]),,,
 [#include <sys/types.h>
 #include <linux/fcntl.h>])

 AC_CHECK_MEMBERS(m4_normalize([
 	struct stat.st_atim.tv_nsec,
 	struct stat.st_blksize,
 	struct stat.st_blocks,
 	struct stat.st_ctim.tv_nsec,
 	struct stat.st_flags,
 	struct stat.st_fstype,
 	struct stat.st_gen,
 	struct stat.st_mtim.tv_nsec,
 	struct stat.st_rdev
 ]))

 AC_CHECK_MEMBERS([struct msghdr.msg_control],,, [#include <sys/socket.h>])

 AC_CHECK_MEMBERS([struct timex.tai],,, [#include <sys/timex.h>])

 AC_CHECK_MEMBERS([struct utsname.domainname],,, [#include <sys/utsname.h>])

 AC_CHECK_MEMBERS([struct sockaddr_in6.sin6_scope_id],,,
 [#include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>])

 AC_CHECK_MEMBERS(m4_normalize([
 	struct stat.st_atime_nsec,
 	struct stat.st_ctime_nsec,
 	struct stat.st_mtime_nsec
 ]),,, [#include <sys/types.h>
 #include <asm/stat.h>])

 AC_CHECK_MEMBERS(m4_normalize([
 	siginfo_t.si_syscall,
 	siginfo_t.si_timerid,
 	siginfo_t.si_overrun
 ]),,, [#include <signal.h>])

 AC_CHECK_HEADERS(m4_normalize([
 	asm/cachectl.h
 	asm/sysmips.h
 	bluetooth/bluetooth.h
 	elf.h
 	inttypes.h
 	linux/bsg.h
 	linux/falloc.h
 	linux/fiemap.h
 	linux/filter.h
 	linux/hiddev.h
 	linux/ip_vs.h
 	linux/ipc.h
 	linux/mmtimer.h
 	linux/msg.h
 	linux/perf_event.h
 	linux/seccomp.h
 	linux/securebits.h
 	linux/sem.h
 	linux/shm.h
 	linux/userfaultfd.h
 	linux/utsname.h
 	mqueue.h
 	netinet/sctp.h
 	scsi/sg.h
 	stropts.h
 	sys/conf.h
 	sys/eventfd.h
 	sys/fanotify.h
 	sys/ipc.h
 	sys/msg.h
 	sys/reg.h
 	sys/sem.h
 	sys/shm.h
 	sys/signalfd.h
 	sys/xattr.h
 ]))

 AC_CHECK_HEADERS([asm/sigcontext.h],,, [#include <signal.h>])

 AC_CHECK_HEADERS([netinet/tcp.h netinet/udp.h],,, [#include <netinet/in.h>])

 AC_CHECK_HEADERS([linux/mqueue.h],,, [#include <linux/types.h>])

 AC_CHECK_HEADERS([linux/icmp.h linux/in6.h linux/netlink.h linux/if_packet.h],,,
 [#include <stddef.h>
 #include <sys/socket.h>
 #include <asm/types.h>])

 AC_CHECK_HEADERS(m4_normalize([
 	linux/netfilter_arp/arp_tables.h
 	linux/netfilter_bridge/ebtables.h
 	linux/netfilter_ipv4/ip_tables.h
 	linux/netfilter_ipv6/ip6_tables.h
 ]),,, [#include <netinet/in.h>
 #include <net/if.h>])

 AC_CHECK_HEADERS([linux/input.h], [
 	AC_CHECK_MEMBERS([struct input_absinfo.resolution],,, [#include <linux/input.h>])
 ])

 AC_CHECK_HEADERS([linux/bpf.h], [
 	AC_CACHE_CHECK([whether union bpf_attr.log_buf initialization works],
 		       [st_cv_have_union_bpf_attr_log_buf],
 		[AC_COMPILE_IFELSE(
 			[AC_LANG_PROGRAM([[#include <linux/bpf.h>]],
 					 [[union bpf_attr a = { .log_buf = 0 };]])],
 			[st_cv_have_union_bpf_attr_log_buf=yes],
 			[st_cv_have_union_bpf_attr_log_buf=no])])
 	if test $st_cv_have_union_bpf_attr_log_buf = yes; then
 		AC_DEFINE(HAVE_UNION_BPF_ATTR_LOG_BUF, [1],
 			  [Define to 1 if union bpf_attr.log_buf initialization works])
 	fi
 ])

 AC_CHECK_TYPES([struct statfs], [
 	AC_CHECK_MEMBERS([struct statfs.f_frsize],,, [#include <linux/types.h>
 #include <asm/statfs.h>])
 	AC_CHECK_MEMBERS([struct statfs.f_flags],,, [#include <linux/types.h>
 #include <asm/statfs.h>])
 	AC_CHECK_MEMBERS([struct statfs.f_fsid.val],,, [#include <linux/types.h>
 #include <asm/statfs.h>])
 	AC_CHECK_MEMBERS([struct statfs.f_fsid.__val],,, [#include <linux/types.h>
 #include <asm/statfs.h>])
 ],, [#include <linux/types.h>
 #include <asm/statfs.h>])

 AC_CHECK_TYPES([struct statfs64], [
 	AC_CHECK_MEMBERS([struct statfs64.f_frsize],,, [#include <linux/types.h>
 #include <asm/statfs.h>])
 	AC_CHECK_MEMBERS([struct statfs64.f_flags],,, [#include <linux/types.h>
 #include <asm/statfs.h>])
 	AC_CHECK_MEMBERS([struct statfs64.f_fsid.val],,, [#include <linux/types.h>
 #include <asm/statfs.h>])
 	AC_CHECK_MEMBERS([struct statfs64.f_fsid.__val],,, [#include <linux/types.h>
 #include <asm/statfs.h>])
 ],, [#include <linux/types.h>
 #include <asm/statfs.h>])

 AC_CHECK_TYPES([struct blk_user_trace_setup],,, [#include <linux/blktrace_api.h>])

 AC_CHECK_HEADERS([linux/btrfs.h], [
 	AC_CHECK_MEMBERS(m4_normalize([
 		struct btrfs_ioctl_feature_flags.compat_flags,
 		struct btrfs_ioctl_fs_info_args.nodesize,
 		struct btrfs_ioctl_defrag_range_args.start
 		struct btrfs_ioctl_search_args_v2.buf_size
 		]),,, [ #include <stdio.h>
 #include <linux/btrfs.h>])
         AC_CHECK_DECLS(m4_normalize([BTRFS_COMPRESS_NONE, BTRFS_COMPRESS_ZLIB,
 	                        BTRFS_COMPRESS_LZO]),,,[ #include <stdio.h>
 #include <linux/btrfs.h>])])

 AC_CHECK_DECLS([sys_errlist])
 AC_CHECK_DECLS(m4_normalize([
 	PTRACE_PEEKUSER,
 	PTRACE_POKEUSER
 ]),,, [#include <sys/ptrace.h>])

 AC_CHECK_DECLS(m4_normalize([
 	P_PID,
 	P_PPID,
 	P_PGID,
 	P_SID,
 	P_CID,
 	P_UID,
 	P_GID,
 	P_ALL,
 	P_LWPID
 ]),,, [#include <sys/wait.h>])

 AC_CHECK_DECLS(m4_normalize([
 	LO_FLAGS_READ_ONLY,
 	LO_FLAGS_AUTOCLEAR,
 	LO_FLAGS_PARTSCAN
 ]),,, [#include <linux/loop.h>])

 AC_CHECK_DECLS(m4_normalize([
 	CTL_PROC,
 	CTL_ARLAN,
 	CTL_S390DBF,
 	CTL_SUNRPC,
 	CTL_PM,
 	CTL_FRV,
 	KERN_PRINTK_RATELIMIT,
 	KERN_PRINTK_RATELIMIT_BURST,
 	KERN_PTY,
 	KERN_NGROUPS_MAX,
 	KERN_SPARC_SCONS_PWROFF,
 	KERN_HZ_TIMER,
 	KERN_UNKNOWN_NMI_PANIC,
 	KERN_BOOTLOADER_TYPE,
 	KERN_RANDOMIZE,
 	KERN_SETUID_DUMPABLE,
 	KERN_SPIN_RETRY,
 	KERN_ACPI_VIDEO_FLAGS,
 	KERN_IA64_UNALIGNED,
 	KERN_COMPAT_LOG,
 	KERN_MAX_LOCK_DEPTH,
 	KERN_NMI_WATCHDOG,
 	KERN_PANIC_ON_NMI,
 	NET_LLC,
 	NET_NETFILTER,
 	NET_DCCP,
 	NET_IRDA,
 	NET_CORE_DESTROY_DELAY,
 	NET_CORE_BUDGET,
 	NET_CORE_AEVENT_ETIME,
 	NET_CORE_AEVENT_RSEQTH,
 	NET_CORE_WARNINGS,
 	NET_IPV4_IGMP_MAX_MSF,
 	NET_TCP_NO_METRICS_SAVE,
 	NET_TCP_DEFAULT_WIN_SCALE,
 	NET_TCP_MODERATE_RCVBUF,
 	NET_TCP_TSO_WIN_DIVISOR,
 	NET_TCP_BIC_BETA,
 	NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
 	NET_TCP_CONG_CONTROL,
 	NET_TCP_ABC,
 	NET_IPV4_IPFRAG_MAX_DIST,
 	NET_TCP_MTU_PROBING,
 	NET_TCP_BASE_MSS,
 	NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS,
 	NET_TCP_DMA_COPYBREAK,
 	NET_TCP_SLOW_START_AFTER_IDLE,
 	NET_CIPSOV4_CACHE_ENABLE,
 	NET_CIPSOV4_CACHE_BUCKET_SIZE,
 	NET_CIPSOV4_RBM_OPTFMT,
 	NET_CIPSOV4_RBM_STRICTVALID,
 	NET_TCP_AVAIL_CONG_CONTROL,
 	NET_TCP_ALLOWED_CONG_CONTROL,
 	NET_TCP_MAX_SSTHRESH,
 	NET_TCP_FRTO_RESPONSE,
 	NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS,
 	NET_IPV4_CONF_FORCE_IGMP_VERSION,
 	NET_IPV4_CONF_ARP_ANNOUNCE,
 	NET_IPV4_CONF_ARP_IGNORE,
 	NET_IPV4_CONF_PROMOTE_SECONDARIES,
 	NET_IPV4_CONF_ARP_ACCEPT,
 	NET_IPV4_CONF_ARP_NOTIFY,
 	NET_IPV6_MLD_MAX_MSF,
 	NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS,
 	VM_MAX_MAP_COUNT,
 	VM_LAPTOP_MODE,
 	VM_BLOCK_DUMP,
 	VM_HUGETLB_GROUP,
 	VM_VFS_CACHE_PRESSURE,
 	VM_LEGACY_VA_LAYOUT,
 	VM_SWAP_TOKEN_TIMEOUT
 ]),,,
 [#include <sys/types.h>
 #include <linux/sysctl.h>])

 AC_CHECK_DECLS(m4_normalize([
 	V4L2_FIELD_ANY,
 	V4L2_FIELD_NONE,
 	V4L2_FIELD_TOP,
 	V4L2_FIELD_BOTTOM,
 	V4L2_FIELD_INTERLACED,
 	V4L2_FIELD_SEQ_TB,
 	V4L2_FIELD_SEQ_BT,
 	V4L2_FIELD_ALTERNATE,
 	V4L2_FIELD_INTERLACED_TB,
 	V4L2_FIELD_INTERLACED_BT,
 	V4L2_BUF_TYPE_VIDEO_CAPTURE,
 	V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
 	V4L2_BUF_TYPE_VIDEO_OUTPUT,
 	V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
 	V4L2_BUF_TYPE_VIDEO_OVERLAY,
 	V4L2_BUF_TYPE_VBI_CAPTURE,
 	V4L2_BUF_TYPE_VBI_OUTPUT,
 	V4L2_BUF_TYPE_SLICED_VBI_CAPTURE,
 	V4L2_BUF_TYPE_SLICED_VBI_OUTPUT,
 	V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY,
 	V4L2_TUNER_RADIO,
 	V4L2_TUNER_ANALOG_TV,
 	V4L2_TUNER_DIGITAL_TV,
 	V4L2_MEMORY_MMAP,
 	V4L2_MEMORY_USERPTR,
 	V4L2_MEMORY_OVERLAY,
 	V4L2_MEMORY_DMABUF,
 	V4L2_COLORSPACE_SMPTE170M,
 	V4L2_COLORSPACE_SMPTE240M,
 	V4L2_COLORSPACE_REC709,
 	V4L2_COLORSPACE_BT878,
 	V4L2_COLORSPACE_470_SYSTEM_M,
 	V4L2_COLORSPACE_470_SYSTEM_BG,
 	V4L2_COLORSPACE_JPEG,
 	V4L2_COLORSPACE_SRGB,
 	V4L2_PRIORITY_UNSET,
 	V4L2_PRIORITY_BACKGROUND,
 	V4L2_PRIORITY_INTERACTIVE,
 	V4L2_PRIORITY_RECORD,
 	V4L2_FRMSIZE_TYPE_DISCRETE,
 	V4L2_FRMSIZE_TYPE_CONTINUOUS,
 	V4L2_FRMSIZE_TYPE_STEPWISE,
 	V4L2_FRMIVAL_TYPE_DISCRETE,
 	V4L2_FRMIVAL_TYPE_CONTINUOUS,
 	V4L2_FRMIVAL_TYPE_STEPWISE,
 	V4L2_CTRL_TYPE_INTEGER,
 	V4L2_CTRL_TYPE_BOOLEAN,
 	V4L2_CTRL_TYPE_MENU,
 	V4L2_CTRL_TYPE_BUTTON,
 	V4L2_CTRL_TYPE_INTEGER64,
 	V4L2_CTRL_TYPE_CTRL_CLASS,
 	V4L2_CTRL_TYPE_STRING,
 	V4L2_CTRL_TYPE_BITMASK,
 	V4L2_CTRL_TYPE_INTEGER_MENU
 ]),,, [#include <sys/time.h>
 #include <linux/ioctl.h>
 #include <linux/types.h>
 #include <linux/videodev2.h>])

 AC_CACHE_CHECK([for BLKGETSIZE64], [ac_cv_have_blkgetsize64],
 	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
 #include <stdlib.h>
 #include <linux/fs.h>], [return !BLKGETSIZE64;])],
 			   [ac_cv_have_blkgetsize64=yes], [ac_cv_have_blkgetsize64=no])]
 	if test $ac_cv_have_blkgetsize64 = yes; then
 		AC_DEFINE([HAVE_BLKGETSIZE64], [1], [Define to 1 if you have BLKGETSIZE64.])
 	fi)

 AC_CHECK_SIZEOF([long])
 AC_CHECK_SIZEOF([long long])
 AC_CHECK_SIZEOF([off_t],,[#include <sys/types.h>])
 AC_CHECK_SIZEOF([struct i64_i32],,[struct i64_i32 {long long i64; int i32;};])

 AC_CACHE_CHECK([for SIGRTMIN], [st_cv_SIGRTMIN],
 	       [[st_cv_SIGRTMIN="$(echo SIGRTMIN |
 			$CPP $CPPFLAGS -P -imacros asm/signal.h - |
 			grep '^[0-9]')"
 	         test -n "$st_cv_SIGRTMIN" || st_cv_SIGRTMIN=no]])
 if test "x$st_cv_SIGRTMIN" != xno; then
 	AC_DEFINE_UNQUOTED([ASM_SIGRTMIN], [$st_cv_SIGRTMIN],
 			   [SIGRTMIN defined in <asm/signal.h>])
 fi
 AC_CACHE_CHECK([for SA_RESTORER], [st_cv_SA_RESTORER],
 	       [st_cv_SA_RESTORER="$(echo SA_RESTORER |
 			$CPP $CPPFLAGS -P -imacros asm/signal.h - |
 			grep ^0x)"
 	        test -n "$st_cv_SA_RESTORER" || st_cv_SA_RESTORER=no])
 if test "x$st_cv_SA_RESTORER" != xno; then
 	AC_DEFINE_UNQUOTED([ASM_SA_RESTORER], [$st_cv_SA_RESTORER],
 			   [SA_RESTORER defined in <asm/signal.h>])
 fi

 AC_CACHE_CHECK([for __builtin_popcount], [st_cv_have___builtin_popcount],
 	       [AC_LINK_IFELSE([AC_LANG_PROGRAM([], [__builtin_popcount(0)])],
 			       [st_cv_have___builtin_popcount=yes],
 			       [st_cv_have___builtin_popcount=no])])
 if test "x$st_cv_have___builtin_popcount" = xyes; then
 	AC_DEFINE([HAVE___BUILTIN_POPCOUNT], [1],
 		  [Define to 1 if the system provides __builtin_popcount function])
 fi

 AC_CHECK_LIB([dl], [dladdr], [dl_LIBS='-ldl'], [dl_LIBS=])
 if test "x$ac_cv_lib_dl_dladdr" = xyes; then
 	AC_DEFINE([HAVE_DLADDR], [1], [Define to 1 if the system provides dladdr])
 fi
 AC_SUBST(dl_LIBS)

 AC_PATH_PROG([PERL], [perl])

 dnl stack trace with libunwind
 libunwind_CPPFLAGS=
 libunwind_LDFLAGS=
 libunwind_LIBS=
 AC_ARG_WITH([libunwind],
             [AS_HELP_STRING([--with-libunwind],
                             [use libunwind to implement stack tracing support])],
             [case "${withval}" in
              yes|no|check) ;;
              *) with_libunwind=yes
                 libunwind_CPPFLAGS="-I${withval}/include"
                 libunwind_LDFLAGS="-L${withval}/lib" ;;
              esac],
             [with_libunwind=check]
 )

 use_libunwind=no
 AS_IF([test "x$with_libunwind" != xno],
       [saved_CPPFLAGS="$CPPFLAGS"
        CPPFLAGS="$CPPFLAGS $libunwind_CPPFLAGS"

        AC_CHECK_HEADERS([libunwind-ptrace.h],
          [saved_LDFLAGS="$LDFLAGS"
           LDFLAGS="$LDFLAGS $libunwind_LDFLAGS"

           AC_CHECK_LIB([unwind], [backtrace],
             [libunwind_LIBS="-lunwind $libunwind_LIBS"

              AC_MSG_CHECKING([for unw_create_addr_space in libunwind-generic])
              saved_LIBS="$LIBS"
              LIBS="-lunwind-generic $libunwind_LIBS $LIBS"

              AC_LINK_IFELSE(
                [AC_LANG_PROGRAM([[#include <libunwind-ptrace.h>]],
                                 [[return !unw_create_addr_space(0, 0)]])
                ],
                [AC_MSG_RESULT([yes])
                 libunwind_LIBS="-lunwind-generic $libunwind_LIBS"

                 AC_CHECK_LIB([unwind-ptrace], [_UPT_create],
                   [libunwind_LIBS="-lunwind-ptrace $libunwind_LIBS"
                    use_libunwind=yes
                   ],
                   [if test "x$with_libunwind" != xcheck; then
                      AC_MSG_FAILURE([failed to find _UPT_create in libunwind-ptrace])
                    fi
                   ],
                   [$libunwind_LIBS]
                 )
                ],
                [AC_MSG_RESULT([no])
                 if test "x$with_libunwind" != xcheck; then
                   AC_MSG_FAILURE([failed to find unw_create_addr_space in libunwind-generic])
                 fi
                ]
              )

              LIBS="$saved_LIBS"
             ],
             [if test "x$with_libunwind" != xcheck; then
                AC_MSG_FAILURE([failed to find libunwind])
              fi
             ],
             [$libunwind_LIBS]
           )

           LDFLAGS="$saved_LDFLAGS"
          ],
          [if test "x$with_libunwind" != xcheck; then
             AC_MSG_FAILURE([failed to find libunwind-ptrace.h])
           fi
          ]
        )

        CPPFLAGS="$saved_CPPFLAGS"
       ]
 )

 dnl enable libunwind
 AC_MSG_CHECKING([whether to enable stack tracing support using libunwind])
 if test "x$use_libunwind" = xyes; then
 	AC_DEFINE([USE_LIBUNWIND], 1, [Compile stack tracing functionality])
 	AC_SUBST(libunwind_LIBS)
 	AC_SUBST(libunwind_LDFLAGS)
 	AC_SUBST(libunwind_CPPFLAGS)
 fi
 AM_CONDITIONAL([USE_LIBUNWIND], [test "x$use_libunwind" = xyes])
 AC_MSG_RESULT([$use_libunwind])

 if test "$arch" = mips && test "$no_create" != yes; then
 	mkdir -p linux/mips
 	if $srcdir/linux/mips/genstub.sh linux/mips; then
 		AC_MSG_RESULT([Generated MIPS syscallent stubs])
 	else
 		AC_MSG_FAILURE([Failed to generate syscallent stubs])
 	fi
 fi

 st_MPERS([m32], [aarch64|powerpc64|sparc64|tile|x32|x86_64])
 st_MPERS([mx32], [x86_64])

 AC_CONFIG_FILES([Makefile tests/Makefile tests-m32/Makefile tests-mx32/Makefile])
 AC_OUTPUT
	# Configure template for strace.
	#
	# Copyright (c) 1999-2001 Wichert Akkerman <wichert@deephackmode.org>
	# Copyright (c) 2002-2009 Roland McGrath <roland@redhat.com>
	# Copyright (c) 2006-2016 Dmitry V. Levin <ldv@altlinux.org>
	# Copyright (c) 2008-2015 Mike Frysinger <vapier@gentoo.org>
	# Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
	# All rights reserved.
	#
	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions
	# are met:
	# 1. Redistributions of source code must retain the above copyright
	# notice, this list of conditions and the following disclaimer.
	# 2. Redistributions in binary form must reproduce the above copyright
	# notice, this list of conditions and the following disclaimer in the
	# documentation and/or other materials provided with the distribution.
	# 3. The name of the author may not be used to endorse or promote products
	# derived from this software without specific prior written permission.
	#
	# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	AC_PREREQ(2.57)
	AC_INIT([strace],
	m4_esyscmd([./git-version-gen .tarball-version]),
	[strace-devel@lists.sourceforge.net])
	AC_CONFIG_SRCDIR([strace.c])
	AC_CONFIG_AUX_DIR([.])
	AC_CONFIG_HEADERS([config.h])
	AM_INIT_AUTOMAKE([foreign nostdinc dist-xz no-dist-gzip silent-rules parallel-tests])
	AM_MAINTAINER_MODE
	AC_CANONICAL_HOST

	AC_PROG_CC
	AC_PROG_CPP
	AX_PROG_CC_FOR_BUILD
	AC_PROG_INSTALL
	AC_PROG_RANLIB

	AC_USE_SYSTEM_EXTENSIONS
	AX_CODE_COVERAGE

	AC_MSG_CHECKING([for supported architecture])
	arch_m32=
	arch_mx32=
	case "$host_cpu" in
	bfin)
	arch=bfin
	AC_DEFINE([BFIN], 1, [Define for the Blackfin architecture.])
	;;
	i[[3456]]86\|pentium)
	arch=i386
	AC_DEFINE([I386], 1, [Define for the i386 architecture.])
	;;
	ia64)
	arch=ia64
	AC_DEFINE([IA64], 1, [Define for the IA64 architecture.])
	;;
	m68k)
	arch=m68k
	AC_DEFINE([M68K], 1, [Define for the m68k architecture.])
	;;
	sparc64*)
	arch=sparc64
	arch_m32=sparc
	AC_DEFINE([SPARC64], 1, [Define for the SPARC64 architecture.])
	;;
	sparc*)
	arch=sparc
	AC_DEFINE([SPARC], 1, [Define for the SPARC architecture.])
	;;
	metag*)
	arch=metag
	AC_DEFINE([METAG], 1, [Define for the Meta architecture.])
	;;
	mips*)
	arch=mips
	AC_DEFINE([MIPS], 1, [Define for the MIPS architecture.])
	;;
	alpha*)
	arch=alpha
	AC_DEFINE([ALPHA], 1, [Define for the Alpha architecture.])
	;;
	powerpc*)
	AC_DEFINE([POWERPC], 1, [Define for the PowerPC architecture.])
	AC_TRY_COMPILE(
	[#ifndef __LP64__
	# error 32 bit
	#endif], [], arch=powerpc64, arch=powerpc)
	if test "$arch" = "powerpc64"; then
	arch_m32=powerpc
	AC_DEFINE([POWERPC64], 1, [Define for the PowerPC64 architecture.])
	fi
	;;
	arm*)
	arch=arm
	AC_DEFINE([ARM], 1, [Define for the ARM architecture.])
	;;
	aarch64*)
	arch=aarch64
	arch_m32=arm
	AC_DEFINE([AARCH64], 1, [Define for the AArch64 architecture.])
	;;
	avr32*)
	arch=avr32
	AC_DEFINE([AVR32], 1, [Define for the AVR32 architecture.])
	;;
	arc*)
	arch=arc
	AC_DEFINE([ARC], 1, [Define for the ARC architecture.])
	;;
	s390)
	arch=s390
	AC_DEFINE([S390], 1, [Define for the S390 architecture.])
	;;
	s390x)
	arch=s390x
	AC_DEFINE([S390X], 1, [Define for the S390x architecture.])
	;;
	hppa\|parisc)
	arch=hppa
	AC_DEFINE([HPPA], 1, [Define for the HPPA architecture.])
	;;
	sh64*)
	arch=sh64
	AC_DEFINE([SH64], 1, [Define for the SH64 architecture.])
	;;
	sh*)
	arch=sh
	AC_DEFINE([SH], 1, [Define for the SH architecture.])
	;;
	x86?64*)
	arch_m32=i386
	AC_TRY_COMPILE(
	[#ifndef __ILP32__
	# error not x32
	#endif], [], arch=x32, arch=x86_64)
	if test "$arch" = "x86_64"; then
	arch_mx32=x32
	AC_DEFINE([X86_64], 1, [Define for the 64bit AMD x86-64 architecture.])
	else
	AC_DEFINE([X32], 1, [Define for the 32bit AMD x86-64 architecture.])
	fi
	;;
	cris\|crisv10)
	arch=crisv10
	AC_DEFINE([CRISV10], 1, [Define for the CRISv10 architecture.])
	;;
	crisv32)
	arch=crisv32
	AC_DEFINE([CRISV32], 1, [Define for the CRISv32 architecture.])
	;;
	tile*)
	arch=tile
	AC_DEFINE([TILE], 1, [Define for the Tile architecture])
	;;
	microblaze*)
	arch=microblaze
	AC_DEFINE([MICROBLAZE], 1, [Define for the MicroBlaze architecture.])
	;;
	nios2*)
	arch=nios2
	AC_DEFINE([NIOS2], 1, [Define for the Nios-II architecture.])
	;;

	or1k*)
	arch=or1k
	AC_DEFINE([OR1K], 1, [Define for the OpenRISC 1000 architecture.])
	;;

	xtensa*)
	arch=xtensa
	AC_DEFINE([XTENSA], 1, [Define for the Xtensa architecture])
	;;

	*)
	AC_MSG_RESULT([NO!])
	AC_MSG_ERROR([architecture $host_cpu is not supported by strace])
	;;
	esac
	AC_MSG_RESULT($arch)

	test -n "$arch_m32" \|\|
	arch_m32=$arch
	test -n "$arch_mx32" \|\|
	arch_mx32=$arch
	AC_SUBST(arch)
	AC_SUBST(arch_m32)
	AC_SUBST(arch_mx32)

	if test "$arch" = mips; then
	AC_CACHE_CHECK([for _MIPS_SIM], [st_cv__MIPS_SIM],
	[AC_COMPUTE_INT([st_cv__MIPS_SIM], [_MIPS_SIM],
	[#include <sgidefs.h>],
	[AC_MSG_ERROR([_MIPS_SIM cannot be determined])])])

	AC_CACHE_CHECK([for MIPS ABI], [st_cv_mips_abi],
	[AC_COMPILE_IFELSE(
	[AC_LANG_PROGRAM([[#include <sgidefs.h>]],
	[[int i[_MIPS_SIM == _MIPS_SIM_ABI32 ? 1 : - 1];]])],
	[st_cv_mips_abi=o32],
	[AC_COMPILE_IFELSE(
	[AC_LANG_PROGRAM([[#include <sgidefs.h>]],
	[[int i[_MIPS_SIM == _MIPS_SIM_NABI32 ? 1 : - 1];]])],
	[st_cv_mips_abi=n32],
	[AC_COMPILE_IFELSE(
	[AC_LANG_PROGRAM([[#include <sgidefs.h>]],
	[[int i[_MIPS_SIM == _MIPS_SIM_ABI64 ? 1 : - 1];]])],
	[st_cv_mips_abi=n64],
	[st_cv_mips_abi=unknown])])])])

	case "$st_cv_mips_abi" in
	o32) AC_DEFINE([LINUX_MIPSO32], [1], [Define for _MIPS_SIM_ABI32.]);;
	n32) AC_DEFINE([LINUX_MIPSN32], [1], [Define for _MIPS_SIM_NABI32.]);;
	n64) AC_DEFINE([LINUX_MIPSN64], [1], [Define for _MIPS_SIM_ABI64.]);;
	*) AC_MSG_ERROR([Unsupported _MIPS_SIM]);;
	esac
	fi

	AC_ARG_ENABLE([arm-oabi],
	[AS_HELP_STRING([--enable-arm-oabi],
	[enable OABI support on ARM EABI])],
	[], [enable_arm_oabi=no])
	case "$enable_arm_oabi" in
	yes) enable_arm_oabi=1 ;;
	no) enable_arm_oabi=0 ;;
	*) AC_MSG_ERROR([bad value $enable_arm_oabi for arm-oabi option]) ;;
	esac
	AC_DEFINE_UNQUOTED([ENABLE_ARM_OABI], [$enable_arm_oabi],
	[Define to 1 if you want OABI support on ARM EABI.])

	gl_WARN_ADD([-Wall])
	gl_WARN_ADD([-Wwrite-strings])
	gl_WARN_ADD([-Wsign-compare])
	AC_ARG_ENABLE([gcc-Werror],
	[AS_HELP_STRING([--enable-gcc-Werror], [turn on gcc's -Werror option])],
	[case $enableval in
	yes) gl_WARN_ADD([-Werror]) ;;
	no) ;;
	*) AC_MSG_ERROR([bad value $enableval for gcc-Werror option]) ;;
	esac]
	)
	AC_SUBST([WARN_CFLAGS])

	AC_C_BIGENDIAN
	AC_C_CONST
	AC_C_TYPEOF

	AC_TYPE_GETGROUPS
	AC_TYPE_MODE_T
	AC_TYPE_SIGNAL
	AC_TYPE_UID_T

	AC_HEADER_DIRENT
	AC_HEADER_MAJOR
	AC_HEADER_STAT
	AC_HEADER_STDBOOL
	AC_HEADER_STDC

	AC_CHECK_FUNCS(m4_normalize([
	fanotify_mark
	fopen64
	fork
	fputs_unlocked
	fstatat
	ftruncate
	futimens
	if_indextoname
	inet_ntop
	inet_pton
	pipe2
	prctl
	preadv
	process_vm_readv
	pwritev
	recvmmsg
	sendmmsg
	sigaction
	signalfd
	stpcpy
	strerror
	strsignal
	sync_file_range
	utimensat
	]))

	AC_CHECK_TYPES([sig_atomic_t, struct sigcontext],,, [#include <signal.h>])

	AC_CHECK_TYPES([struct mmsghdr],,, [#include <sys/socket.h>])

	AC_CHECK_TYPES([__kernel_long_t, __kernel_ulong_t],,,
	[#include <asm/posix_types.h>])

	AC_CHECK_TYPES([struct stat64, struct __old_kernel_stat],,,
	[#include <sys/types.h>
	#include <asm/stat.h>])

	AC_CHECK_TYPES(m4_normalize([
	struct pt_all_user_regs,
	struct ia64_fpreg,
	struct ptrace_peeksiginfo_args
	]),,, [#include <sys/ptrace.h>])

	AC_CHECK_TYPES(m4_normalize([
	struct flock,
	struct flock64,
	struct __kernel_flock,
	struct __kernel_flock64
	]),,,
	[#include <sys/types.h>
	#include <linux/fcntl.h>])

	AC_CHECK_MEMBERS(m4_normalize([
	struct stat.st_atim.tv_nsec,
	struct stat.st_blksize,
	struct stat.st_blocks,
	struct stat.st_ctim.tv_nsec,
	struct stat.st_flags,
	struct stat.st_fstype,
	struct stat.st_gen,
	struct stat.st_mtim.tv_nsec,
	struct stat.st_rdev
	]))

	AC_CHECK_MEMBERS([struct msghdr.msg_control],,, [#include <sys/socket.h>])

	AC_CHECK_MEMBERS([struct timex.tai],,, [#include <sys/timex.h>])

	AC_CHECK_MEMBERS([struct utsname.domainname],,, [#include <sys/utsname.h>])

	AC_CHECK_MEMBERS([struct sockaddr_in6.sin6_scope_id],,,
	[#include <sys/types.h>
	#include <sys/socket.h>
	#include <netinet/in.h>])

	AC_CHECK_MEMBERS(m4_normalize([
	struct stat.st_atime_nsec,
	struct stat.st_ctime_nsec,
	struct stat.st_mtime_nsec
	]),,, [#include <sys/types.h>
	#include <asm/stat.h>])

	AC_CHECK_MEMBERS(m4_normalize([
	siginfo_t.si_syscall,
	siginfo_t.si_timerid,
	siginfo_t.si_overrun
	]),,, [#include <signal.h>])

	AC_CHECK_HEADERS(m4_normalize([
	asm/cachectl.h
	asm/sysmips.h
	bluetooth/bluetooth.h
	elf.h
	inttypes.h
	linux/bsg.h
	linux/falloc.h
	linux/fiemap.h
	linux/filter.h
	linux/hiddev.h
	linux/ip_vs.h
	linux/ipc.h
	linux/mmtimer.h
	linux/msg.h
	linux/perf_event.h
	linux/seccomp.h
	linux/securebits.h
	linux/sem.h
	linux/shm.h
	linux/userfaultfd.h
	linux/utsname.h
	mqueue.h
	netinet/sctp.h
	scsi/sg.h
	stropts.h
	sys/conf.h
	sys/eventfd.h
	sys/fanotify.h
	sys/ipc.h
	sys/msg.h
	sys/reg.h
	sys/sem.h
	sys/shm.h
	sys/signalfd.h
	sys/xattr.h
	]))

	AC_CHECK_HEADERS([asm/sigcontext.h],,, [#include <signal.h>])

	AC_CHECK_HEADERS([netinet/tcp.h netinet/udp.h],,, [#include <netinet/in.h>])

	AC_CHECK_HEADERS([linux/mqueue.h],,, [#include <linux/types.h>])

	AC_CHECK_HEADERS([linux/icmp.h linux/in6.h linux/netlink.h linux/if_packet.h],,,
	[#include <stddef.h>
	#include <sys/socket.h>
	#include <asm/types.h>])

	AC_CHECK_HEADERS(m4_normalize([
	linux/netfilter_arp/arp_tables.h
	linux/netfilter_bridge/ebtables.h
	linux/netfilter_ipv4/ip_tables.h
	linux/netfilter_ipv6/ip6_tables.h
	]),,, [#include <netinet/in.h>
	#include <net/if.h>])

	AC_CHECK_HEADERS([linux/input.h], [
	AC_CHECK_MEMBERS([struct input_absinfo.resolution],,, [#include <linux/input.h>])
	])

	AC_CHECK_HEADERS([linux/bpf.h], [
	AC_CACHE_CHECK([whether union bpf_attr.log_buf initialization works],
	[st_cv_have_union_bpf_attr_log_buf],
	[AC_COMPILE_IFELSE(
	[AC_LANG_PROGRAM([[#include <linux/bpf.h>]],
	[[union bpf_attr a = { .log_buf = 0 };]])],
	[st_cv_have_union_bpf_attr_log_buf=yes],
	[st_cv_have_union_bpf_attr_log_buf=no])])
	if test $st_cv_have_union_bpf_attr_log_buf = yes; then
	AC_DEFINE(HAVE_UNION_BPF_ATTR_LOG_BUF, [1],
	[Define to 1 if union bpf_attr.log_buf initialization works])
	fi
	])

	AC_CHECK_TYPES([struct statfs], [
	AC_CHECK_MEMBERS([struct statfs.f_frsize],,, [#include <linux/types.h>
	#include <asm/statfs.h>])
	AC_CHECK_MEMBERS([struct statfs.f_flags],,, [#include <linux/types.h>
	#include <asm/statfs.h>])
	AC_CHECK_MEMBERS([struct statfs.f_fsid.val],,, [#include <linux/types.h>
	#include <asm/statfs.h>])
	AC_CHECK_MEMBERS([struct statfs.f_fsid.__val],,, [#include <linux/types.h>
	#include <asm/statfs.h>])
	],, [#include <linux/types.h>
	#include <asm/statfs.h>])

	AC_CHECK_TYPES([struct statfs64], [
	AC_CHECK_MEMBERS([struct statfs64.f_frsize],,, [#include <linux/types.h>
	#include <asm/statfs.h>])
	AC_CHECK_MEMBERS([struct statfs64.f_flags],,, [#include <linux/types.h>
	#include <asm/statfs.h>])
	AC_CHECK_MEMBERS([struct statfs64.f_fsid.val],,, [#include <linux/types.h>
	#include <asm/statfs.h>])
	AC_CHECK_MEMBERS([struct statfs64.f_fsid.__val],,, [#include <linux/types.h>
	#include <asm/statfs.h>])
	],, [#include <linux/types.h>
	#include <asm/statfs.h>])

	AC_CHECK_TYPES([struct blk_user_trace_setup],,, [#include <linux/blktrace_api.h>])

	AC_CHECK_HEADERS([linux/btrfs.h], [
	AC_CHECK_MEMBERS(m4_normalize([
	struct btrfs_ioctl_feature_flags.compat_flags,
	struct btrfs_ioctl_fs_info_args.nodesize,
	struct btrfs_ioctl_defrag_range_args.start
	struct btrfs_ioctl_search_args_v2.buf_size
	]),,, [ #include <stdio.h>
	#include <linux/btrfs.h>])
	AC_CHECK_DECLS(m4_normalize([BTRFS_COMPRESS_NONE, BTRFS_COMPRESS_ZLIB,
	BTRFS_COMPRESS_LZO]),,,[ #include <stdio.h>
	#include <linux/btrfs.h>])])

	AC_CHECK_DECLS([sys_errlist])
	AC_CHECK_DECLS(m4_normalize([
	PTRACE_PEEKUSER,
	PTRACE_POKEUSER
	]),,, [#include <sys/ptrace.h>])

	AC_CHECK_DECLS(m4_normalize([
	P_PID,
	P_PPID,
	P_PGID,
	P_SID,
	P_CID,
	P_UID,
	P_GID,
	P_ALL,
	P_LWPID
	]),,, [#include <sys/wait.h>])

	AC_CHECK_DECLS(m4_normalize([
	LO_FLAGS_READ_ONLY,
	LO_FLAGS_AUTOCLEAR,
	LO_FLAGS_PARTSCAN
	]),,, [#include <linux/loop.h>])

	AC_CHECK_DECLS(m4_normalize([
	CTL_PROC,
	CTL_ARLAN,
	CTL_S390DBF,
	CTL_SUNRPC,
	CTL_PM,
	CTL_FRV,
	KERN_PRINTK_RATELIMIT,
	KERN_PRINTK_RATELIMIT_BURST,
	KERN_PTY,
	KERN_NGROUPS_MAX,
	KERN_SPARC_SCONS_PWROFF,
	KERN_HZ_TIMER,
	KERN_UNKNOWN_NMI_PANIC,
	KERN_BOOTLOADER_TYPE,
	KERN_RANDOMIZE,
	KERN_SETUID_DUMPABLE,
	KERN_SPIN_RETRY,
	KERN_ACPI_VIDEO_FLAGS,
	KERN_IA64_UNALIGNED,
	KERN_COMPAT_LOG,
	KERN_MAX_LOCK_DEPTH,
	KERN_NMI_WATCHDOG,
	KERN_PANIC_ON_NMI,
	NET_LLC,
	NET_NETFILTER,
	NET_DCCP,
	NET_IRDA,
	NET_CORE_DESTROY_DELAY,
	NET_CORE_BUDGET,
	NET_CORE_AEVENT_ETIME,
	NET_CORE_AEVENT_RSEQTH,
	NET_CORE_WARNINGS,
	NET_IPV4_IGMP_MAX_MSF,
	NET_TCP_NO_METRICS_SAVE,
	NET_TCP_DEFAULT_WIN_SCALE,
	NET_TCP_MODERATE_RCVBUF,
	NET_TCP_TSO_WIN_DIVISOR,
	NET_TCP_BIC_BETA,
	NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,
	NET_TCP_CONG_CONTROL,
	NET_TCP_ABC,
	NET_IPV4_IPFRAG_MAX_DIST,
	NET_TCP_MTU_PROBING,
	NET_TCP_BASE_MSS,
	NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS,
	NET_TCP_DMA_COPYBREAK,
	NET_TCP_SLOW_START_AFTER_IDLE,
	NET_CIPSOV4_CACHE_ENABLE,
	NET_CIPSOV4_CACHE_BUCKET_SIZE,
	NET_CIPSOV4_RBM_OPTFMT,
	NET_CIPSOV4_RBM_STRICTVALID,
	NET_TCP_AVAIL_CONG_CONTROL,
	NET_TCP_ALLOWED_CONG_CONTROL,
	NET_TCP_MAX_SSTHRESH,
	NET_TCP_FRTO_RESPONSE,
	NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS,
	NET_IPV4_CONF_FORCE_IGMP_VERSION,
	NET_IPV4_CONF_ARP_ANNOUNCE,
	NET_IPV4_CONF_ARP_IGNORE,
	NET_IPV4_CONF_PROMOTE_SECONDARIES,
	NET_IPV4_CONF_ARP_ACCEPT,
	NET_IPV4_CONF_ARP_NOTIFY,
	NET_IPV6_MLD_MAX_MSF,
	NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS,
	VM_MAX_MAP_COUNT,
	VM_LAPTOP_MODE,
	VM_BLOCK_DUMP,
	VM_HUGETLB_GROUP,
	VM_VFS_CACHE_PRESSURE,
	VM_LEGACY_VA_LAYOUT,
	VM_SWAP_TOKEN_TIMEOUT
	]),,,
	[#include <sys/types.h>
	#include <linux/sysctl.h>])

	AC_CHECK_DECLS(m4_normalize([
	V4L2_FIELD_ANY,
	V4L2_FIELD_NONE,
	V4L2_FIELD_TOP,
	V4L2_FIELD_BOTTOM,
	V4L2_FIELD_INTERLACED,
	V4L2_FIELD_SEQ_TB,
	V4L2_FIELD_SEQ_BT,
	V4L2_FIELD_ALTERNATE,
	V4L2_FIELD_INTERLACED_TB,
	V4L2_FIELD_INTERLACED_BT,
	V4L2_BUF_TYPE_VIDEO_CAPTURE,
	V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
	V4L2_BUF_TYPE_VIDEO_OUTPUT,
	V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE,
	V4L2_BUF_TYPE_VIDEO_OVERLAY,
	V4L2_BUF_TYPE_VBI_CAPTURE,
	V4L2_BUF_TYPE_VBI_OUTPUT,
	V4L2_BUF_TYPE_SLICED_VBI_CAPTURE,
	V4L2_BUF_TYPE_SLICED_VBI_OUTPUT,
	V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY,
	V4L2_TUNER_RADIO,
	V4L2_TUNER_ANALOG_TV,
	V4L2_TUNER_DIGITAL_TV,
	V4L2_MEMORY_MMAP,
	V4L2_MEMORY_USERPTR,
	V4L2_MEMORY_OVERLAY,
	V4L2_MEMORY_DMABUF,
	V4L2_COLORSPACE_SMPTE170M,
	V4L2_COLORSPACE_SMPTE240M,
	V4L2_COLORSPACE_REC709,
	V4L2_COLORSPACE_BT878,
	V4L2_COLORSPACE_470_SYSTEM_M,
	V4L2_COLORSPACE_470_SYSTEM_BG,
	V4L2_COLORSPACE_JPEG,
	V4L2_COLORSPACE_SRGB,
	V4L2_PRIORITY_UNSET,
	V4L2_PRIORITY_BACKGROUND,
	V4L2_PRIORITY_INTERACTIVE,
	V4L2_PRIORITY_RECORD,
	V4L2_FRMSIZE_TYPE_DISCRETE,
	V4L2_FRMSIZE_TYPE_CONTINUOUS,
	V4L2_FRMSIZE_TYPE_STEPWISE,
	V4L2_FRMIVAL_TYPE_DISCRETE,
	V4L2_FRMIVAL_TYPE_CONTINUOUS,
	V4L2_FRMIVAL_TYPE_STEPWISE,
	V4L2_CTRL_TYPE_INTEGER,
	V4L2_CTRL_TYPE_BOOLEAN,
	V4L2_CTRL_TYPE_MENU,
	V4L2_CTRL_TYPE_BUTTON,
	V4L2_CTRL_TYPE_INTEGER64,
	V4L2_CTRL_TYPE_CTRL_CLASS,
	V4L2_CTRL_TYPE_STRING,
	V4L2_CTRL_TYPE_BITMASK,
	V4L2_CTRL_TYPE_INTEGER_MENU
	]),,, [#include <sys/time.h>
	#include <linux/ioctl.h>
	#include <linux/types.h>
	#include <linux/videodev2.h>])

	AC_CACHE_CHECK([for BLKGETSIZE64], [ac_cv_have_blkgetsize64],
	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
	#include <stdlib.h>
	#include <linux/fs.h>], [return !BLKGETSIZE64;])],
	[ac_cv_have_blkgetsize64=yes], [ac_cv_have_blkgetsize64=no])]
	if test $ac_cv_have_blkgetsize64 = yes; then
	AC_DEFINE([HAVE_BLKGETSIZE64], [1], [Define to 1 if you have BLKGETSIZE64.])
	fi)

	AC_CHECK_SIZEOF([long])
	AC_CHECK_SIZEOF([long long])
	AC_CHECK_SIZEOF([off_t],,[#include <sys/types.h>])
	AC_CHECK_SIZEOF([struct i64_i32],,[struct i64_i32 {long long i64; int i32;};])

	AC_CACHE_CHECK([for SIGRTMIN], [st_cv_SIGRTMIN],
	[[st_cv_SIGRTMIN="$(echo SIGRTMIN \|
	$CPP $CPPFLAGS -P -imacros asm/signal.h - \|
	grep '^[0-9]')"
	test -n "$st_cv_SIGRTMIN" \|\| st_cv_SIGRTMIN=no]])
	if test "x$st_cv_SIGRTMIN" != xno; then
	AC_DEFINE_UNQUOTED([ASM_SIGRTMIN], [$st_cv_SIGRTMIN],
	[SIGRTMIN defined in <asm/signal.h>])
	fi
	AC_CACHE_CHECK([for SA_RESTORER], [st_cv_SA_RESTORER],
	[st_cv_SA_RESTORER="$(echo SA_RESTORER \|
	$CPP $CPPFLAGS -P -imacros asm/signal.h - \|
	grep ^0x)"
	test -n "$st_cv_SA_RESTORER" \|\| st_cv_SA_RESTORER=no])
	if test "x$st_cv_SA_RESTORER" != xno; then
	AC_DEFINE_UNQUOTED([ASM_SA_RESTORER], [$st_cv_SA_RESTORER],
	[SA_RESTORER defined in <asm/signal.h>])
	fi

	AC_CACHE_CHECK([for __builtin_popcount], [st_cv_have___builtin_popcount],
	[AC_LINK_IFELSE([AC_LANG_PROGRAM([], [__builtin_popcount(0)])],
	[st_cv_have___builtin_popcount=yes],
	[st_cv_have___builtin_popcount=no])])
	if test "x$st_cv_have___builtin_popcount" = xyes; then
	AC_DEFINE([HAVE___BUILTIN_POPCOUNT], [1],
	[Define to 1 if the system provides __builtin_popcount function])
	fi

	AC_CHECK_LIB([dl], [dladdr], [dl_LIBS='-ldl'], [dl_LIBS=])
	if test "x$ac_cv_lib_dl_dladdr" = xyes; then
	AC_DEFINE([HAVE_DLADDR], [1], [Define to 1 if the system provides dladdr])
	fi
	AC_SUBST(dl_LIBS)

	AC_PATH_PROG([PERL], [perl])

	dnl stack trace with libunwind
	libunwind_CPPFLAGS=
	libunwind_LDFLAGS=
	libunwind_LIBS=
	AC_ARG_WITH([libunwind],
	[AS_HELP_STRING([--with-libunwind],
	[use libunwind to implement stack tracing support])],
	[case "${withval}" in
	yes\|no\|check) ;;
	*) with_libunwind=yes
	libunwind_CPPFLAGS="-I${withval}/include"
	libunwind_LDFLAGS="-L${withval}/lib" ;;
	esac],
	[with_libunwind=check]
	)

	use_libunwind=no
	AS_IF([test "x$with_libunwind" != xno],
	[saved_CPPFLAGS="$CPPFLAGS"
	CPPFLAGS="$CPPFLAGS $libunwind_CPPFLAGS"

	AC_CHECK_HEADERS([libunwind-ptrace.h],
	[saved_LDFLAGS="$LDFLAGS"
	LDFLAGS="$LDFLAGS $libunwind_LDFLAGS"

	AC_CHECK_LIB([unwind], [backtrace],
	[libunwind_LIBS="-lunwind $libunwind_LIBS"

	AC_MSG_CHECKING([for unw_create_addr_space in libunwind-generic])
	saved_LIBS="$LIBS"
	LIBS="-lunwind-generic $libunwind_LIBS $LIBS"

	AC_LINK_IFELSE(
	[AC_LANG_PROGRAM([[#include <libunwind-ptrace.h>]],
	[[return !unw_create_addr_space(0, 0)]])
	],
	[AC_MSG_RESULT([yes])
	libunwind_LIBS="-lunwind-generic $libunwind_LIBS"

	AC_CHECK_LIB([unwind-ptrace], [_UPT_create],
	[libunwind_LIBS="-lunwind-ptrace $libunwind_LIBS"
	use_libunwind=yes
	],
	[if test "x$with_libunwind" != xcheck; then
	AC_MSG_FAILURE([failed to find _UPT_create in libunwind-ptrace])
	fi
	],
	[$libunwind_LIBS]
	)
	],
	[AC_MSG_RESULT([no])
	if test "x$with_libunwind" != xcheck; then
	AC_MSG_FAILURE([failed to find unw_create_addr_space in libunwind-generic])
	fi
	]
	)

	LIBS="$saved_LIBS"
	],
	[if test "x$with_libunwind" != xcheck; then
	AC_MSG_FAILURE([failed to find libunwind])
	fi
	],
	[$libunwind_LIBS]
	)

	LDFLAGS="$saved_LDFLAGS"
	],
	[if test "x$with_libunwind" != xcheck; then
	AC_MSG_FAILURE([failed to find libunwind-ptrace.h])
	fi
	]
	)

	CPPFLAGS="$saved_CPPFLAGS"
	]
	)

	dnl enable libunwind
	AC_MSG_CHECKING([whether to enable stack tracing support using libunwind])
	if test "x$use_libunwind" = xyes; then
	AC_DEFINE([USE_LIBUNWIND], 1, [Compile stack tracing functionality])
	AC_SUBST(libunwind_LIBS)
	AC_SUBST(libunwind_LDFLAGS)
	AC_SUBST(libunwind_CPPFLAGS)
	fi
	AM_CONDITIONAL([USE_LIBUNWIND], [test "x$use_libunwind" = xyes])
	AC_MSG_RESULT([$use_libunwind])

	if test "$arch" = mips && test "$no_create" != yes; then
	mkdir -p linux/mips
	if $srcdir/linux/mips/genstub.sh linux/mips; then
	AC_MSG_RESULT([Generated MIPS syscallent stubs])
	else
	AC_MSG_FAILURE([Failed to generate syscallent stubs])
	fi
	fi

	st_MPERS([m32], [aarch64\|powerpc64\|sparc64\|tile\|x32\|x86_64])
	st_MPERS([mx32], [x86_64])

	AC_CONFIG_FILES([Makefile tests/Makefile tests-m32/Makefile tests-mx32/Makefile])
	AC_OUTPUT