[lttng-ust.git] / configure.ac

dnl -*- Autoconf -*-
dnl Process this file with autoconf to produce a configure script.

dnl Version infos
m4_define([V_MAJOR], [2])
m4_define([V_MINOR], [8])
m4_define([V_PATCH], [0])
m4_define([V_EXTRA], [pre])
m4_define([V_STRING], [V_MAJOR.V_MINOR.V_PATCH])
m4_ifdef([V_EXTRA], [m4_append([V_STRING], [-V_EXTRA])])
m4_define([V_NAME], [[Herbe à Détourne]])
m4_define([V_DESC], [[Brewed with unrestrained amounts of Citra hop, the Herbe à Détourne is a fantastic New World Tripel brewed by "Dieu du Ciel!". Aromas of mango, cantaloupe melon and passion fruit, combined with a controlled bitter finish, unite in making this smooth golden-orange beer stand apart.]])

AC_INIT([lttng-ust], V_STRING, [mathieu dot desnoyers at efficios dot com])

# Following the numbering scheme proposed by libtool for the library version
# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
# This is the library version of liblttng-ust.
AC_SUBST([LTTNG_UST_LIBRARY_VERSION], [0:0:0])
# note: remember to update tracepoint.h dlopen() to match this version
# number. TODO: eventually automate by exporting the major number.

# This is the library version of liblttng-ust-ctl, used internally by
# liblttng-ust, lttng-sessiond, and lttng-consumerd.
AC_SUBST([LTTNG_UST_CTL_LIBRARY_VERSION], [2:0:0])

AC_CONFIG_AUX_DIR([config])
AC_CANONICAL_TARGET
AC_CANONICAL_HOST
AC_CONFIG_MACRO_DIR([config])
AM_INIT_AUTOMAKE([1.9 foreign dist-bzip2 no-dist-gzip tar-ustar])
AM_MAINTAINER_MODE([enable])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
AC_CONFIG_SRCDIR([include/lttng/tracepoint.h])

# Configuration options, which will be installed in the config.h
AC_CONFIG_HEADERS([config.h include/lttng/ust-config.h])
AH_TEMPLATE([LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS], [Use efficient unaligned access.])
AH_TEMPLATE([LTTNG_UST_HAVE_SDT_INTEGRATION], [SystemTap integration via sdt.h])
AH_TEMPLATE([LTTNG_UST_HAVE_PERF_EVENT], [Perf event integration via perf_event.h])

dnl Substitute minor/major/patchlevel version numbers
AC_SUBST([MAJOR_VERSION], [V_MAJOR])
AC_SUBST([MINOR_VERSION], [V_MINOR])
AC_SUBST([PATCHLEVEL_VERSION], [V_PATCH])

AC_PROG_SED
AC_PROG_GREP
AC_PROG_LN_S

# libtool link_all_deplibs fixup. See http://bugs.lttng.org/issues/321.
AC_ARG_ENABLE([libtool-linkdep-fixup], [
	AS_HELP_STRING([--disable-libtool-linkdep-fixup], [disable the libtool fixup for linking all dependent libraries (link_all_deplibs)])
], [
	libtool_fixup=$enableval
], [
	libtool_fixup=yes
])

AS_IF([test "x$libtool_fixup" = "xyes"], [
	libtool_m4="$srcdir/config/libtool.m4"
	libtool_flag_pattern=".*link_all_deplibs\s*,\s*\$1\s*)"
	AC_MSG_CHECKING([for occurence(s) of link_all_deplibs = no in $libtool_m4])
	libtool_flag_pattern_count=$(grep -c "$libtool_flag_pattern\s*=\s*no" $libtool_m4)

	AS_IF([test $libtool_flag_pattern_count -ne 0], [
	AC_MSG_RESULT([$libtool_flag_pattern_count])
	AC_MSG_WARN([the detected libtool will not link all dependencies, forcing link_all_deplibs = unknown])
		sed -i "s/\($libtool_flag_pattern\)\s*=\s*no/\1=unknown/g" $libtool_m4
	], [
		AC_MSG_RESULT([none])
	])
])

AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])

# Checks for programs.
AC_PROG_CC
AC_PROG_CXX
AC_PROG_MAKE_SET
LT_INIT

# rw_PROG_CXX_WORKS
# Check whether the C++ compiler works.
AC_CACHE_CHECK([whether the C++ compiler works], [rw_cv_prog_cxx_works], [
	AC_LANG_PUSH([C++])

	AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
		check_cxx_designated_initializers=yes
	], [
		rw_cv_prog_cxx_works=no
	])

	AS_IF([test "x$check_cxx_designated_initializers" = "xyes"], [
		AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
			struct foo { int a; int b; };
			void fct(void)
			{
				struct foo f = { .a = 0, .b = 1 };
			}
		]])], [
			rw_cv_prog_cxx_works=yes
		], [
			rw_cv_prog_cxx_works=no
		])
	])

	AC_LANG_POP([C++])
])

AM_CONDITIONAL([CXX_WORKS], [test "x$rw_cv_prog_cxx_works" = "xyes"])

# Check if the compiler support weak symbols
AX_SYS_WEAK_ALIAS

AS_IF([test "x${ax_cv_sys_weak_alias}" = "xno"], [
	AC_MSG_ERROR([Your platform doesn't support weak symbols.])
])

# Checks for libraries.
AC_CHECK_LIB([dl], [dlopen], [
	have_libdl=yes
], [
	#libdl not found, check for dlopen in libc.
	AC_CHECK_LIB([c], [dlopen], [
		have_libc_dl=yes
	], [
		AC_MSG_ERROR([Cannot find dlopen in libdl nor libc. Use [LDFLAGS]=-Ldir to specify their location.])
	])
])

AM_CONDITIONAL([LTTNG_UST_BUILD_WITH_LIBDL], [test "x$have_libdl" = "xyes"])
AM_CONDITIONAL([LTTNG_UST_BUILD_WITH_LIBC_DL], [test "x$have_libc_dl" = "xyes"])

AC_CHECK_LIB([pthread], [pthread_create])

# Check for dlfcn.h
AC_CHECK_HEADER([dlfcn.h])
AS_IF([test "x${ac_cv_header_dlfcn_h}" = "xyes"], [
	AC_CHECK_DECLS([RTLD_DI_LINKMAP], [], [], [
		#define _GNU_SOURCE /* Required on Linux to get GNU extensions */
		#include <dlfcn.h>
	])
], [
	ac_cv_have_decl_RTLD_DI_LINKMAP="no"
])

AM_CONDITIONAL([HAVE_DLINFO], [test "x${ac_cv_have_decl_RTLD_DI_LINKMAP}" = "xyes"])

# Checks for header files.
dnl AC_CHECK_HEADERS([fcntl.h stdint.h stdlib.h string.h sys/socket.h sys/time.h unistd.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_C_INLINE
dnl AC_TYPE_INT16_T
dnl AC_TYPE_INT32_T
dnl AC_TYPE_INT64_T
dnl AC_TYPE_INT8_T
dnl AC_TYPE_PID_T
dnl AC_TYPE_SIZE_T
dnl AC_TYPE_SSIZE_T
dnl AC_TYPE_UINT16_T
dnl AC_TYPE_UINT32_T
dnl AC_TYPE_UINT64_T
dnl AC_TYPE_UINT8_T
dnl AC_CHECK_TYPES([ptrdiff_t])

# Checks for library functions.
AC_FUNC_MALLOC
AC_CHECK_FUNCS([gettimeofday munmap socket strerror strtol sched_getcpu sysconf])

CFLAGS="-Wall $CFLAGS"

# URCU

# urcu - check if we just find the headers it out of the box.
AC_CHECK_HEADERS([urcu-bp.h], [], [AC_MSG_ERROR([Cannot find [URCU] headers (urcu-bp.h). Use [CPPFLAGS]=-Idir to specify their location.
This error can also occur when the liburcu package's configure script has not been run.])])

# urcu-cds - check that URCU Concurrent Data Structure lib is available to compilation
# Part of Userspace RCU library 0.7.2 or better.
AC_CHECK_LIB([urcu-cds], [_cds_lfht_new], [], [AC_MSG_ERROR([Cannot find
liburcu-cds lib, part of Userspace RCU 0.7 or better. Use [LDFLAGS]=-Ldir to specify its location.])])

AC_MSG_CHECKING([caa_likely()])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
	#include <urcu/compiler.h>
	void fct(void)
	{
		if (caa_likely(1)) {
		}
	}
]])], [
	AC_MSG_RESULT([yes])
], [
	AC_MSG_RESULT([no])
	AC_MSG_ERROR([Please upgrade your version of liburcu to 0.6.6 or better])
])

# urcu - check that URCU lib is available to compilation
AC_CHECK_LIB([urcu-bp], [synchronize_rcu_bp], [], [AC_MSG_ERROR([Cannot find liburcu-bp lib. Use [LDFLAGS]=-Ldir to specify its location.])])

# urcu - check that URCU lib is at least version 0.6
AC_CHECK_LIB([urcu-bp], [call_rcu_bp], [], [AC_MSG_ERROR([liburcu 0.6 or newer is needed, please update your version or use [LDFLAGS]=-Ldir to specify the right location.])])

# optional linux/perf_event.h
AC_CHECK_HEADERS([linux/perf_event.h], [have_perf_event=yes], [])

# Perf event counters are only supported on x86 so far.
AC_MSG_CHECKING([UST support for architecture perf event counters])
AS_CASE([$host_cpu],
	[i[[3456]]86], [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=yes],
	[x86_64], [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=yes],
	[amd64], [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=yes],
	[UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=no])
AC_MSG_RESULT([$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS])

AM_CONDITIONAL([HAVE_PERF_EVENT], [test "x$have_perf_event" = "xyes" && test "x$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS" = "xyes"])

AS_IF([test "x$have_perf_event" = "xyes" && test "x$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS" = "xyes"], [
	AC_DEFINE([LTTNG_UST_HAVE_PERF_EVENT], [1])
])

AC_MSG_CHECKING([host system alignment requirements])
AS_CASE([$host_cpu],
	[i[[3456]]86], [],
	[x86_64], [],
	[amd64], [],
	[powerpc], [],
	[ppc64], [],
	[ppc64le], [],
	[powerpc64], [],
	[powerpc64le], [],
	[s390], [NO_UNALIGNED_ACCESS=1],
	[s390x], [NO_UNALIGNED_ACCESS=1],
	[arm*], [NO_UNALIGNED_ACCESS=1],
	[aarch64], [NO_UNALIGNED_ACCESS=1],
	[mips*], [NO_UNALIGNED_ACCESS=1],
	[tile*], [NO_UNALIGNED_ACCESS=1],
	[
		UNSUPPORTED_ARCH=1
		NO_UNALIGNED_ACCESS=1
	])
AC_MSG_RESULT([$host_cpu])

AS_IF([test "x$NO_UNALIGNED_ACCESS" = "x"], [
	AC_DEFINE([LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS], [1])
])

# Check for JNI header files if requested
AC_ARG_ENABLE([jni-interface], [
	AS_HELP_STRING([--enable-jni-interface], [build JNI interface between C and Java. Needs Java include files [default=no]])
], [
	jni_interface=$enableval
], [
	jni_interface=no
])

AM_CONDITIONAL([BUILD_JNI_INTERFACE], [test "x$jni_interface" = "xyes"])


AC_ARG_ENABLE([java-agent-jul], [
	AS_HELP_STRING([--enable-java-agent-jul], [build the LTTng UST Java agent with JUL support [default=no]])
], [
	java_agent_jul=$enableval
], [
	java_agent_jul=no
])

AC_ARG_ENABLE([java-agent-log4j], [
	AS_HELP_STRING([--enable-java-agent-log4j], [build the LTTng UST Java agent with Log4j support [default=no]])
], [
	java_agent_log4j=$enableval
], [
	java_agent_log4j=no
])

AC_ARG_ENABLE([java-agent-all], [
	AS_HELP_STRING([--enable-java-agent-all], [build the LTTng UST Java agent with all supported backends [default=no]])
], [
	java_agent_jul=$enableval
	java_agent_log4j=$enableval
], [:])

AM_CONDITIONAL([BUILD_JAVA_AGENT], [test "x$java_agent_jul" = "xyes" || test "x$java_agent_log4j" = "xyes"])
AM_CONDITIONAL([BUILD_JAVA_AGENT_WITH_JUL], [test "x$java_agent_jul" = "xyes"])
AM_CONDITIONAL([BUILD_JAVA_AGENT_WITH_LOG4J], [test "x$java_agent_log4j" = "xyes"])

AS_IF([test "x$jni_interface" = "xyes" || test "x$java_agent_jul" = "xyes" || test "x$java_agent_log4j" = "xyes"], [
	AX_JAVA_OPTIONS
	AX_PROG_JAVAC
	AX_PROG_JAVA
	AX_PROG_JAR

	AX_JNI_INCLUDE_DIR
	for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS
	do
		CPPFLAGS="$CPPFLAGS -I$JNI_INCLUDE_DIR"
	done

	AX_PROG_JAVAH
])

AS_IF([test "x$java_agent_log4j" = "xyes"], [
	AX_CHECK_CLASSPATH
	AX_CHECK_CLASS([org.apache.log4j.Logger])
	AS_IF([test "x$ac_cv_class_org_apache_log4j_Logger" = "xno"], [
		AC_MSG_ERROR([The UST Java agent support for log4j was requested but the Log4j classes were not found. Please specify the location of the Log4j jar via the Java CLASSPATH e.g: export CLASSPATH="/path/to/log4j.jar"])
	])
])

# Option to build the python agent
AC_ARG_ENABLE([python-agent], [
	AS_HELP_STRING([--enable-python-agent], [build the LTTng UST Python agent [default=no]])
], [
	python_agent=$enableval
], [:])
AM_CONDITIONAL([BUILD_PYTHON_AGENT], [test "x$python_agent" = "xyes"])
AS_IF([test "x$python_agent" = "xyes"], [
	AM_PATH_PYTHON([2.7])
])

# sdt.h integration
AC_ARG_WITH([sdt], [
	AS_HELP_STRING([--with-sdt], [provide SystemTap integration via sdt.h [default=no]])
], [
	with_sdt=$withval
], [
	with_sdt="no"
])

AS_IF([test "x$with_sdt" = "xyes"], [
	AC_MSG_CHECKING([STAP_PROBEV()])
	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
		#define SDT_USE_VARIADIC
		#include <sys/sdt.h>
		void fct(void)
		{
			STAP_PROBEV(provider,name,1,2,3,4,5,6,7,8,9,10);
		}
	]])], [
		AC_MSG_RESULT([yes])
		AC_DEFINE([LTTNG_UST_HAVE_SDT_INTEGRATION], [1])
	], [
		AC_MSG_RESULT([no])
		AC_MSG_ERROR([The sdt.h integration was requested but the STAP_PROBEV define cannot be used. Make sure it is installed, and up to date, or use CPPFLAGS=-I/path/ to specify a non-standard path to sys/sdt.h])
	])
])

AC_MSG_CHECKING([whether shared libraries are enabled])
AS_IF([test "x$enable_shared" = "xyes"], [
	AC_MSG_RESULT([yes])
], [
	AC_MSG_RESULT([no])
	AC_MSG_ERROR([LTTng-UST requires shared libraries to be enabled])
])

AC_ARG_WITH([lttng-system-rundir], [
	AS_HELP_STRING([--with-lttng-system-rundir], [Location of the system directory where LTTng-UST expects the system-wide lttng-sessiond runtime files. The default is "/var/run/lttng".]),
], [
	lttng_system_rundir="$withval"
], [
	lttng_system_rundir="/var/run/lttng"
])
AC_DEFINE_UNQUOTED([LTTNG_SYSTEM_RUNDIR], ["$lttng_system_rundir"],
		[LTTng system runtime directory])

AC_CHECK_PROG([BUILD_GEN_TP_EXAMPLES], [python], ["yes"])
AM_CONDITIONAL([BUILD_GEN_TP_EXAMPLES], [test "x$BUILD_GEN_TP_EXAMPLES" = "xyes"])

AC_CONFIG_FILES([
	Makefile
	doc/Makefile
	doc/examples/Makefile
	include/Makefile
	include/lttng/ust-version.h
	snprintf/Makefile
	libringbuffer/Makefile
	liblttng-ust-comm/Makefile
	liblttng-ust/Makefile
	liblttng-ust-ctl/Makefile
	liblttng-ust-fork/Makefile
	liblttng-ust-dl/Makefile
	liblttng-ust-java/Makefile
	liblttng-ust-java-agent/Makefile
	liblttng-ust-java-agent/java/Makefile
	liblttng-ust-java-agent/java/lttng-ust-agent-common/Makefile
	liblttng-ust-java-agent/java/lttng-ust-agent-jul/Makefile
	liblttng-ust-java-agent/java/lttng-ust-agent-log4j/Makefile
	liblttng-ust-java-agent/jni/Makefile
	liblttng-ust-java-agent/jni/common/Makefile
	liblttng-ust-java-agent/jni/jul/Makefile
	liblttng-ust-java-agent/jni/log4j/Makefile
	liblttng-ust-libc-wrapper/Makefile
	liblttng-ust-cyg-profile/Makefile
	liblttng-ust-python-agent/Makefile
	python-lttngust/Makefile
	python-lttngust/setup.py
	python-lttngust/lttngust/__init__.py
	tools/Makefile
	tests/Makefile
	tests/ctf-types/Makefile
	tests/hello/Makefile
	tests/hello.cxx/Makefile
	tests/same_line_tracepoint/Makefile
	tests/snprintf/Makefile
	tests/ust-elf/Makefile
	tests/benchmark/Makefile
	tests/utils/Makefile
	tests/test-app-ctx/Makefile
	lttng-ust.pc
])

# Create link for python agent for the VPATH guru.
AC_CONFIG_LINKS([
	python-lttngust/lttngust/agent.py:python-lttngust/lttngust/agent.py
	python-lttngust/lttngust/cmd.py:python-lttngust/lttngust/cmd.py
	python-lttngust/lttngust/debug.py:python-lttngust/lttngust/debug.py
	python-lttngust/lttngust/loghandler.py:python-lttngust/lttngust/loghandler.py
])

AC_OUTPUT

AS_ECHO
AS_ECHO(["m4_bpatsubst(V_NAME, ["], [\\"])"])
AS_ECHO
AS_ECHO(["m4_bpatsubst(V_DESC, ["], [\\"])"])

# Report on the configuration options
AS_ECHO
AS_ECHO(["LTTng-UST will be built with the following options:"])

AS_ECHO

AS_ECHO_N(["Java agent (JUL support): "])
AS_IF([test "x$java_agent_jul" = "xyes"], [AS_ECHO(["Enabled"])], [AS_ECHO(["Disabled"])])

AS_ECHO_N(["Java agent (Log4j support): "])
AS_IF([test "x$java_agent_log4j" = "xyes"], [AS_ECHO(["Enabled"])], [AS_ECHO(["Disabled"])])

AS_ECHO_N(["JNI interface (JNI): "])
AS_IF([test "x$jni_interface" = "xyes"], [AS_ECHO(["Enabled"])], [AS_ECHO(["Disabled"])])

AS_ECHO_N(["Python ($PYTHON) agent: "])
AS_IF([test "x$python_agent" = "xyes"], [AS_ECHO(["Enabled"])], [AS_ECHO(["Disabled"])])

AS_ECHO_N(["sdt.h integration: "])
AS_IF([test "x$with_sdt" = "xyes"], [AS_ECHO(["Enabled"])], [AS_ECHO(["Disabled"])])

AS_ECHO(["Architecture: $host_cpu"])
AS_ECHO_N(["Efficient unaligned memory access: "])
AS_IF([test "x$NO_UNALIGNED_ACCESS" != "x1"], [AS_ECHO(["yes"])], [AS_IF([test "x$UNSUPPORTED_ARCH" != "x1"], [AS_ECHO(["no"])], [AS_ECHO(["unknown"])])])
AS_IF([test "x$UNSUPPORTED_ARCH" = "x1"], [AC_MSG_WARN([Your architecture ($host_cpu) is unsupported, using safe default of no unaligned access])])
AS_ECHO

AS_ECHO(["Type 'make' to compile."])
Commit	Line	Data
86adb855	1	dnl -- Autoconf --
b54f2130	2	dnl Process this file with autoconf to produce a configure script.
1304f3df	3
16f9d99c	4	dnl Version infos
58f107eb PP	5	m4_define([V_MAJOR], [2])
	6	m4_define([V_MINOR], [8])
	7	m4_define([V_PATCH], [0])
	8	m4_define([V_EXTRA], [pre])
	9	m4_define([V_STRING], [V_MAJOR.V_MINOR.V_PATCH])
	10	m4_ifdef([V_EXTRA], [m4_append([V_STRING], [-V_EXTRA])])
16f9d99c PP	11	m4_define([V_NAME], [[Herbe à Détourne]])
16f9d99c PP	12	m4_define([V_DESC], [[Brewed with unrestrained amounts of Citra hop, the Herbe à Détourne is a fantastic New World Tripel brewed by "Dieu du Ciel!". Aromas of mango, cantaloupe melon and passion fruit, combined with a controlled bitter finish, unite in making this smooth golden-orange beer stand apart.]])
58f107eb	13
86adb855	14	AC_INIT([lttng-ust], V_STRING, [mathieu dot desnoyers at efficios dot com])
a334646a MD	15
	16	# Following the numbering scheme proposed by libtool for the library version
	17	# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
41a2a9aa	18	# This is the library version of liblttng-ust.
a334646a MD	19	AC_SUBST([LTTNG_UST_LIBRARY_VERSION], [0:0:0])
	20	# note: remember to update tracepoint.h dlopen() to match this version
	21	# number. TODO: eventually automate by exporting the major number.
	22
41a2a9aa MD	23	# This is the library version of liblttng-ust-ctl, used internally by
41a2a9aa MD	24	# liblttng-ust, lttng-sessiond, and lttng-consumerd.
76bacff6	25	AC_SUBST([LTTNG_UST_CTL_LIBRARY_VERSION], [2:0:0])
41a2a9aa	26
55355fa5	27	AC_CONFIG_AUX_DIR([config])
9441df61 PMF	28	AC_CANONICAL_TARGET
9441df61 PMF	29	AC_CANONICAL_HOST
50f3dba0	30	AC_CONFIG_MACRO_DIR([config])
a995492f	31	AM_INIT_AUTOMAKE([1.9 foreign dist-bzip2 no-dist-gzip tar-ustar])
846154aa	32	AM_MAINTAINER_MODE([enable])
50f3dba0	33	m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
4318ae1b	34	AC_CONFIG_SRCDIR([include/lttng/tracepoint.h])
4846fadc AM	35
4846fadc AM	36	# Configuration options, which will be installed in the config.h
562c813a MD	37	AC_CONFIG_HEADERS([config.h include/lttng/ust-config.h])
562c813a MD	38	AH_TEMPLATE([LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS], [Use efficient unaligned access.])
02120ddf	39	AH_TEMPLATE([LTTNG_UST_HAVE_SDT_INTEGRATION], [SystemTap integration via sdt.h])
d58d1454	40	AH_TEMPLATE([LTTNG_UST_HAVE_PERF_EVENT], [Perf event integration via perf_event.h])
23c8854a	41
b54f2130	42	dnl Substitute minor/major/patchlevel version numbers
58f107eb PP	43	AC_SUBST([MAJOR_VERSION], [V_MAJOR])
	44	AC_SUBST([MINOR_VERSION], [V_MINOR])
	45	AC_SUBST([PATCHLEVEL_VERSION], [V_PATCH])
161239e0	46
46a73fe4	47	AC_PROG_SED
faebb418	48	AC_PROG_GREP
85e09133	49	AC_PROG_LN_S
46a73fe4	50
faebb418	51	# libtool link_all_deplibs fixup. See http://bugs.lttng.org/issues/321.
86adb855 PP	52	AC_ARG_ENABLE([libtool-linkdep-fixup], [
	53	AS_HELP_STRING([--disable-libtool-linkdep-fixup], [disable the libtool fixup for linking all dependent libraries (link_all_deplibs)])
	54	], [
	55	libtool_fixup=$enableval
	56	], [
	57	libtool_fixup=yes
	58	])
	59
	60	AS_IF([test "x$libtool_fixup" = "xyes"], [
	61	libtool_m4="$srcdir/config/libtool.m4"
	62	libtool_flag_pattern=".link_all_deplibs\s,\s\$1\s)"
	63	AC_MSG_CHECKING([for occurence(s) of link_all_deplibs = no in $libtool_m4])
	64	libtool_flag_pattern_count=$(grep -c "$libtool_flag_pattern\s=\sno" $libtool_m4)
	65
	66	AS_IF([test $libtool_flag_pattern_count -ne 0], [
	67	AC_MSG_RESULT([$libtool_flag_pattern_count])
	68	AC_MSG_WARN([the detected libtool will not link all dependencies, forcing link_all_deplibs = unknown])
	69	sed -i "s/\($libtool_flag_pattern\)\s=\sno/\1=unknown/g" $libtool_m4
	70	], [
	71	AC_MSG_RESULT([none])
	72	])
	73	])
faebb418	74
824a00a7 MD	75	AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
824a00a7 MD	76
1304f3df PMF	77	# Checks for programs.
1304f3df PMF	78	AC_PROG_CC
6b79f035	79	AC_PROG_CXX
1304f3df	80	AC_PROG_MAKE_SET
fa1c6efe	81	LT_INIT
1304f3df	82
340f7763 SM	83	# rw_PROG_CXX_WORKS
340f7763 SM	84	# Check whether the C++ compiler works.
86adb855 PP	85	AC_CACHE_CHECK([whether the C++ compiler works], [rw_cv_prog_cxx_works], [
	86	AC_LANG_PUSH([C++])
	87
	88	AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
	89	check_cxx_designated_initializers=yes
	90	], [
	91	rw_cv_prog_cxx_works=no
	92	])
	93
	94	AS_IF([test "x$check_cxx_designated_initializers" = "xyes"], [
	95	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
	96	struct foo { int a; int b; };
	97	void fct(void)
	98	{
	99	struct foo f = { .a = 0, .b = 1 };
	100	}
	101	]])], [
	102	rw_cv_prog_cxx_works=yes
	103	], [
	104	rw_cv_prog_cxx_works=no
0e7d861a	105	])
86adb855 PP	106	])
	107
	108	AC_LANG_POP([C++])
	109	])
340f7763 SM	110
	111	AM_CONDITIONAL([CXX_WORKS], [test "x$rw_cv_prog_cxx_works" = "xyes"])
	112
f1d4b810 CB	113	# Check if the compiler support weak symbols
	114	AX_SYS_WEAK_ALIAS
	115
0e7d861a PP	116	AS_IF([test "x${ax_cv_sys_weak_alias}" = "xno"], [
	117	AC_MSG_ERROR([Your platform doesn't support weak symbols.])
	118	])
f1d4b810	119
b54f2130	120	# Checks for libraries.
86adb855	121	AC_CHECK_LIB([dl], [dlopen], [
c6c454ab	122	have_libdl=yes
86adb855	123	], [
c6c454ab	124	#libdl not found, check for dlopen in libc.
86adb855	125	AC_CHECK_LIB([c], [dlopen], [
c6c454ab	126	have_libc_dl=yes
86adb855	127	], [
c6c454ab MD	128	AC_MSG_ERROR([Cannot find dlopen in libdl nor libc. Use [LDFLAGS]=-Ldir to specify their location.])
	129	])
	130	])
86adb855	131
c6c454ab MD	132	AM_CONDITIONAL([LTTNG_UST_BUILD_WITH_LIBDL], [test "x$have_libdl" = "xyes"])
	133	AM_CONDITIONAL([LTTNG_UST_BUILD_WITH_LIBC_DL], [test "x$have_libc_dl" = "xyes"])
	134
e26c8207	135	AC_CHECK_LIB([pthread], [pthread_create])
1304f3df	136
f9ff7aa4 RN	137	# Check for dlfcn.h
f9ff7aa4 RN	138	AC_CHECK_HEADER([dlfcn.h])
86adb855 PP	139	AS_IF([test "x${ac_cv_header_dlfcn_h}" = "xyes"], [
	140	AC_CHECK_DECLS([RTLD_DI_LINKMAP], [], [], [
	141	#define _GNU_SOURCE /* Required on Linux to get GNU extensions */
	142	#include <dlfcn.h>
	143	])
	144	], [
	145	ac_cv_have_decl_RTLD_DI_LINKMAP="no"
	146	])
	147
f9ff7aa4 RN	148	AM_CONDITIONAL([HAVE_DLINFO], [test "x${ac_cv_have_decl_RTLD_DI_LINKMAP}" = "xyes"])
f9ff7aa4 RN	149
1304f3df	150	# Checks for header files.
b54f2130	151	dnl AC_CHECK_HEADERS([fcntl.h stdint.h stdlib.h string.h sys/socket.h sys/time.h unistd.h])
1304f3df PMF	152
	153	# Checks for typedefs, structures, and compiler characteristics.
	154	AC_C_INLINE
b54f2130 PP	155	dnl AC_TYPE_INT16_T
	156	dnl AC_TYPE_INT32_T
	157	dnl AC_TYPE_INT64_T
	158	dnl AC_TYPE_INT8_T
	159	dnl AC_TYPE_PID_T
	160	dnl AC_TYPE_SIZE_T
	161	dnl AC_TYPE_SSIZE_T
	162	dnl AC_TYPE_UINT16_T
	163	dnl AC_TYPE_UINT32_T
	164	dnl AC_TYPE_UINT64_T
	165	dnl AC_TYPE_UINT8_T
	166	dnl AC_CHECK_TYPES([ptrdiff_t])
1304f3df PMF	167
	168	# Checks for library functions.
	169	AC_FUNC_MALLOC
e9d165be	170	AC_CHECK_FUNCS([gettimeofday munmap socket strerror strtol sched_getcpu sysconf])
1304f3df	171
fbae86d6 MD	172	CFLAGS="-Wall $CFLAGS"
fbae86d6 MD	173
8624c549 PMF	174	# URCU
	175
	176	# urcu - check if we just find the headers it out of the box.
135987a5	177	AC_CHECK_HEADERS([urcu-bp.h], [], [AC_MSG_ERROR([Cannot find [URCU] headers (urcu-bp.h). Use [CPPFLAGS]=-Idir to specify their location.
cacb7fbe	178	This error can also occur when the liburcu package's configure script has not been run.])])
bf956ec0 MD	179
	180	# urcu-cds - check that URCU Concurrent Data Structure lib is available to compilation
	181	# Part of Userspace RCU library 0.7.2 or better.
	182	AC_CHECK_LIB([urcu-cds], [_cds_lfht_new], [], [AC_MSG_ERROR([Cannot find
	183	liburcu-cds lib, part of Userspace RCU 0.7 or better. Use [LDFLAGS]=-Ldir to specify its location.])])
8624c549	184
b5a3dfa5	185	AC_MSG_CHECKING([caa_likely()])
31b07350	186	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
86adb855 PP	187	#include <urcu/compiler.h>
	188	void fct(void)
	189	{
	190	if (caa_likely(1)) {
	191	}
b5a3dfa5	192	}
86adb855	193	]])], [
b5a3dfa5	194	AC_MSG_RESULT([yes])
86adb855	195	], [
b5a3dfa5 MD	196	AC_MSG_RESULT([no])
b5a3dfa5 MD	197	AC_MSG_ERROR([Please upgrade your version of liburcu to 0.6.6 or better])
727bb6cb	198	])
b5a3dfa5	199
8624c549	200	# urcu - check that URCU lib is available to compilation
cfa0520d	201	AC_CHECK_LIB([urcu-bp], [synchronize_rcu_bp], [], [AC_MSG_ERROR([Cannot find liburcu-bp lib. Use [LDFLAGS]=-Ldir to specify its location.])])
e3073410	202
a6830b14 MD	203	# urcu - check that URCU lib is at least version 0.6
a6830b14 MD	204	AC_CHECK_LIB([urcu-bp], [call_rcu_bp], [], [AC_MSG_ERROR([liburcu 0.6 or newer is needed, please update your version or use [LDFLAGS]=-Ldir to specify the right location.])])
e3073410	205
d58d1454 MD	206	# optional linux/perf_event.h
d58d1454 MD	207	AC_CHECK_HEADERS([linux/perf_event.h], [have_perf_event=yes], [])
d58d1454	208
1113f842 CB	209	# Perf event counters are only supported on x86 so far.
1113f842 CB	210	AC_MSG_CHECKING([UST support for architecture perf event counters])
0516f3b3 PP	211	AS_CASE([$host_cpu],
	212	[i[[3456]]86], [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=yes],
	213	[x86_64], [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=yes],
	214	[amd64], [UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=yes],
	215	[UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS=no])
1113f842 CB	216	AC_MSG_RESULT([$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS])
1113f842 CB	217
8f22f7fb	218	AM_CONDITIONAL([HAVE_PERF_EVENT], [test "x$have_perf_event" = "xyes" && test "x$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS" = "xyes"])
1113f842	219
8f22f7fb	220	AS_IF([test "x$have_perf_event" = "xyes" && test "x$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS" = "xyes"], [
0e7d861a PP	221	AC_DEFINE([LTTNG_UST_HAVE_PERF_EVENT], [1])
0e7d861a PP	222	])
d58d1454	223
dca6e79f	224	AC_MSG_CHECKING([host system alignment requirements])
0516f3b3 PP	225	AS_CASE([$host_cpu],
	226	[i[[3456]]86], [],
	227	[x86_64], [],
	228	[amd64], [],
	229	[powerpc], [],
	230	[ppc64], [],
	231	[ppc64le], [],
	232	[powerpc64], [],
	233	[powerpc64le], [],
	234	[s390], [NO_UNALIGNED_ACCESS=1],
	235	[s390x], [NO_UNALIGNED_ACCESS=1],
	236	[arm*], [NO_UNALIGNED_ACCESS=1],
	237	[aarch64], [NO_UNALIGNED_ACCESS=1],
	238	[mips*], [NO_UNALIGNED_ACCESS=1],
	239	[tile*], [NO_UNALIGNED_ACCESS=1],
	240	[
0ea8bd08 MJ	241	UNSUPPORTED_ARCH=1
0ea8bd08 MJ	242	NO_UNALIGNED_ACCESS=1
0516f3b3	243	])
f039c6b0	244	AC_MSG_RESULT([$host_cpu])
ed452f03	245
0e7d861a PP	246	AS_IF([test "x$NO_UNALIGNED_ACCESS" = "x"], [
	247	AC_DEFINE([LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS], [1])
	248	])
2699970a	249
2b6f8df9	250	# Check for JNI header files if requested
86adb855 PP	251	AC_ARG_ENABLE([jni-interface], [
	252	AS_HELP_STRING([--enable-jni-interface], [build JNI interface between C and Java. Needs Java include files [default=no]])
	253	], [
	254	jni_interface=$enableval
	255	], [
	256	jni_interface=no
	257	])
2b6f8df9	258
b2263155	259	AM_CONDITIONAL([BUILD_JNI_INTERFACE], [test "x$jni_interface" = "xyes"])
2b6f8df9	260
501f6777	261
86adb855 PP	262	AC_ARG_ENABLE([java-agent-jul], [
	263	AS_HELP_STRING([--enable-java-agent-jul], [build the LTTng UST Java agent with JUL support [default=no]])
	264	], [
	265	java_agent_jul=$enableval
	266	], [
	267	java_agent_jul=no
	268	])
501f6777	269
86adb855 PP	270	AC_ARG_ENABLE([java-agent-log4j], [
	271	AS_HELP_STRING([--enable-java-agent-log4j], [build the LTTng UST Java agent with Log4j support [default=no]])
	272	], [
	273	java_agent_log4j=$enableval
	274	], [
	275	java_agent_log4j=no
	276	])
501f6777	277
86adb855 PP	278	AC_ARG_ENABLE([java-agent-all], [
	279	AS_HELP_STRING([--enable-java-agent-all], [build the LTTng UST Java agent with all supported backends [default=no]])
	280	], [
	281	java_agent_jul=$enableval
	282	java_agent_log4j=$enableval
	283	], [:])
501f6777 CB	284
	285	AM_CONDITIONAL([BUILD_JAVA_AGENT], [test "x$java_agent_jul" = "xyes" \|\| test "x$java_agent_log4j" = "xyes"])
	286	AM_CONDITIONAL([BUILD_JAVA_AGENT_WITH_JUL], [test "x$java_agent_jul" = "xyes"])
	287	AM_CONDITIONAL([BUILD_JAVA_AGENT_WITH_LOG4J], [test "x$java_agent_log4j" = "xyes"])
	288
0e7d861a PP	289	AS_IF([test "x$jni_interface" = "xyes" \|\| test "x$java_agent_jul" = "xyes" \|\| test "x$java_agent_log4j" = "xyes"], [
	290	AX_JAVA_OPTIONS
	291	AX_PROG_JAVAC
	292	AX_PROG_JAVA
	293	AX_PROG_JAR
501f6777	294
0e7d861a PP	295	AX_JNI_INCLUDE_DIR
	296	for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS
	297	do
	298	CPPFLAGS="$CPPFLAGS -I$JNI_INCLUDE_DIR"
	299	done
501f6777	300
0e7d861a PP	301	AX_PROG_JAVAH
0e7d861a PP	302	])
501f6777	303
0e7d861a PP	304	AS_IF([test "x$java_agent_log4j" = "xyes"], [
0e7d861a PP	305	AX_CHECK_CLASSPATH
0e7d861a	306	AX_CHECK_CLASS([org.apache.log4j.Logger])
0e7d861a PP	307	AS_IF([test "x$ac_cv_class_org_apache_log4j_Logger" = "xno"], [
	308	AC_MSG_ERROR([The UST Java agent support for log4j was requested but the Log4j classes were not found. Please specify the location of the Log4j jar via the Java CLASSPATH e.g: export CLASSPATH="/path/to/log4j.jar"])
	309	])
	310	])
501f6777	311
c3e14096	312	# Option to build the python agent
86adb855 PP	313	AC_ARG_ENABLE([python-agent], [
	314	AS_HELP_STRING([--enable-python-agent], [build the LTTng UST Python agent [default=no]])
	315	], [
	316	python_agent=$enableval
	317	], [:])
c3e14096	318	AM_CONDITIONAL([BUILD_PYTHON_AGENT], [test "x$python_agent" = "xyes"])
0e7d861a	319	AS_IF([test "x$python_agent" = "xyes"], [
55c9e5ae	320	AM_PATH_PYTHON([2.7])
0e7d861a	321	])
c3e14096	322
4846fadc	323	# sdt.h integration
86adb855 PP	324	AC_ARG_WITH([sdt], [
	325	AS_HELP_STRING([--with-sdt], [provide SystemTap integration via sdt.h [default=no]])
	326	], [
	327	with_sdt=$withval
	328	], [
	329	with_sdt="no"
	330	])
4846fadc	331
86adb855	332	AS_IF([test "x$with_sdt" = "xyes"], [
491f30fe MD	333	AC_MSG_CHECKING([STAP_PROBEV()])
491f30fe MD	334	AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
86adb855 PP	335	#define SDT_USE_VARIADIC
	336	#include <sys/sdt.h>
	337	void fct(void)
	338	{
	339	STAP_PROBEV(provider,name,1,2,3,4,5,6,7,8,9,10);
	340	}
	341	]])], [
491f30fe	342	AC_MSG_RESULT([yes])
562c813a	343	AC_DEFINE([LTTNG_UST_HAVE_SDT_INTEGRATION], [1])
86adb855	344	], [
491f30fe	345	AC_MSG_RESULT([no])
135987a5	346	AC_MSG_ERROR([The sdt.h integration was requested but the STAP_PROBEV define cannot be used. Make sure it is installed, and up to date, or use CPPFLAGS=-I/path/ to specify a non-standard path to sys/sdt.h])
4846fadc AM	347	])
	348	])
	349
ccb19569	350	AC_MSG_CHECKING([whether shared libraries are enabled])
86adb855 PP	351	AS_IF([test "x$enable_shared" = "xyes"], [
	352	AC_MSG_RESULT([yes])
	353	], [
	354	AC_MSG_RESULT([no])
	355	AC_MSG_ERROR([LTTng-UST requires shared libraries to be enabled])
	356	])
ccb19569	357
86adb855 PP	358	AC_ARG_WITH([lttng-system-rundir], [
	359	AS_HELP_STRING([--with-lttng-system-rundir], [Location of the system directory where LTTng-UST expects the system-wide lttng-sessiond runtime files. The default is "/var/run/lttng".]),
	360	], [
	361	lttng_system_rundir="$withval"
	362	], [
	363	lttng_system_rundir="/var/run/lttng"
	364	])
751d4e91	365	AC_DEFINE_UNQUOTED([LTTNG_SYSTEM_RUNDIR], ["$lttng_system_rundir"],
86adb855	366	[LTTng system runtime directory])
751d4e91	367
86adb855	368	AC_CHECK_PROG([BUILD_GEN_TP_EXAMPLES], [python], ["yes"])
0d8ba43d	369	AM_CONDITIONAL([BUILD_GEN_TP_EXAMPLES], [test "x$BUILD_GEN_TP_EXAMPLES" = "xyes"])
2b90f1d3	370
55355fa5 JB	371	AC_CONFIG_FILES([
55355fa5 JB	372	Makefile
7ccf75d3 MD	373	doc/Makefile
7ccf75d3 MD	374	doc/examples/Makefile
69400ac4	375	include/Makefile
b728d87e	376	include/lttng/ust-version.h
69400ac4	377	snprintf/Makefile
4931a13e	378	libringbuffer/Makefile
69400ac4 MD	379	liblttng-ust-comm/Makefile
	380	liblttng-ust/Makefile
	381	liblttng-ust-ctl/Makefile
	382	liblttng-ust-fork/Makefile
b13d93c2	383	liblttng-ust-dl/Makefile
69400ac4	384	liblttng-ust-java/Makefile
501f6777 CB	385	liblttng-ust-java-agent/Makefile
501f6777 CB	386	liblttng-ust-java-agent/java/Makefile
8e57e02f AM	387	liblttng-ust-java-agent/java/lttng-ust-agent-common/Makefile
	388	liblttng-ust-java-agent/java/lttng-ust-agent-jul/Makefile
	389	liblttng-ust-java-agent/java/lttng-ust-agent-log4j/Makefile
501f6777	390	liblttng-ust-java-agent/jni/Makefile
8ab5c06b	391	liblttng-ust-java-agent/jni/common/Makefile
501f6777 CB	392	liblttng-ust-java-agent/jni/jul/Makefile
501f6777 CB	393	liblttng-ust-java-agent/jni/log4j/Makefile
476037d9	394	liblttng-ust-libc-wrapper/Makefile
70d654f2	395	liblttng-ust-cyg-profile/Makefile
c3e14096	396	liblttng-ust-python-agent/Makefile
5b6ff569 PP	397	python-lttngust/Makefile
	398	python-lttngust/setup.py
	399	python-lttngust/lttngust/__init__.py
b25c5b37	400	tools/Makefile
6dd969b5	401	tests/Makefile
c785c634	402	tests/ctf-types/Makefile
6dd969b5	403	tests/hello/Makefile
6b79f035	404	tests/hello.cxx/Makefile
90c09854	405	tests/same_line_tracepoint/Makefile
d23b20e9	406	tests/snprintf/Makefile
22609c7a	407	tests/ust-elf/Makefile
a44af49d	408	tests/benchmark/Makefile
9a4b88ff	409	tests/utils/Makefile
53569322	410	tests/test-app-ctx/Makefile
74a6d87b	411	lttng-ust.pc
55355fa5	412	])
1f9eff07	413
bf261856 JR	414	# Create link for python agent for the VPATH guru.
bf261856 JR	415	AC_CONFIG_LINKS([
5b6ff569 PP	416	python-lttngust/lttngust/agent.py:python-lttngust/lttngust/agent.py
	417	python-lttngust/lttngust/cmd.py:python-lttngust/lttngust/cmd.py
	418	python-lttngust/lttngust/debug.py:python-lttngust/lttngust/debug.py
	419	python-lttngust/lttngust/loghandler.py:python-lttngust/lttngust/loghandler.py
bf261856 JR	420	])
bf261856 JR	421
1304f3df	422	AC_OUTPUT
1f9eff07	423
2770ab16	424	AS_ECHO
16f9d99c	425	AS_ECHO(["m4_bpatsubst(V_NAME, ["], [\\"])"])
2a5b1cfe	426	AS_ECHO
16f9d99c	427	AS_ECHO(["m4_bpatsubst(V_DESC, ["], [\\"])"])
649282a8	428
1f9eff07	429	# Report on the configuration options
2a5b1cfe	430	AS_ECHO
79057ae6	431	AS_ECHO(["LTTng-UST will be built with the following options:"])
1f9eff07	432
2a5b1cfe	433	AS_ECHO
501f6777	434
79057ae6 PP	435	AS_ECHO_N(["Java agent (JUL support): "])
79057ae6 PP	436	AS_IF([test "x$java_agent_jul" = "xyes"], [AS_ECHO(["Enabled"])], [AS_ECHO(["Disabled"])])
501f6777	437
79057ae6 PP	438	AS_ECHO_N(["Java agent (Log4j support): "])
79057ae6 PP	439	AS_IF([test "x$java_agent_log4j" = "xyes"], [AS_ECHO(["Enabled"])], [AS_ECHO(["Disabled"])])
501f6777	440
79057ae6 PP	441	AS_ECHO_N(["JNI interface (JNI): "])
79057ae6 PP	442	AS_IF([test "x$jni_interface" = "xyes"], [AS_ECHO(["Enabled"])], [AS_ECHO(["Disabled"])])
1f9eff07	443
79057ae6 PP	444	AS_ECHO_N(["Python ($PYTHON) agent: "])
79057ae6 PP	445	AS_IF([test "x$python_agent" = "xyes"], [AS_ECHO(["Enabled"])], [AS_ECHO(["Disabled"])])
c3e14096	446
79057ae6 PP	447	AS_ECHO_N(["sdt.h integration: "])
79057ae6 PP	448	AS_IF([test "x$with_sdt" = "xyes"], [AS_ECHO(["Enabled"])], [AS_ECHO(["Disabled"])])
1f9eff07	449
79057ae6 PP	450	AS_ECHO(["Architecture: $host_cpu"])
	451	AS_ECHO_N(["Efficient unaligned memory access: "])
	452	AS_IF([test "x$NO_UNALIGNED_ACCESS" != "x1"], [AS_ECHO(["yes"])], [AS_IF([test "x$UNSUPPORTED_ARCH" != "x1"], [AS_ECHO(["no"])], [AS_ECHO(["unknown"])])])
0ea8bd08	453	AS_IF([test "x$UNSUPPORTED_ARCH" = "x1"], [AC_MSG_WARN([Your architecture ($host_cpu) is unsupported, using safe default of no unaligned access])])
2a5b1cfe	454	AS_ECHO
0ea8bd08	455
79057ae6	456	AS_ECHO(["Type 'make' to compile."])
1f9eff07	457