# -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.
-AC_INIT([lttng-ust],[2.0.0-rc1],[mathieu dot desnoyers at efficios dot com])
+AC_INIT([lttng-ust],[2.8.0-pre],[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([foreign])
+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])
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])
# Compute minor/major/patchlevel version numbers
AC_PROG_SED
AC_DEFINE_UNQUOTED([VERSION_MINOR], $minor_version, [UST minor version number])
AC_DEFINE_UNQUOTED([VERSION_PATCHLEVEL], $patchlevel_version, [UST patchlevel version number])
+version_name="Herbe à Détourne"
+version_description='Brewed with unrestrained amounts of Citra hop, the Herbe à Détourne is a fantastic New World Tripel brewed by "Dieu du Ciel!". Aromas of mango, cantaloupe melon and passion fruit, combined with a controlled bitter finish, unite in making this smooth golden-orange beer stand apart.'
+version_description_c=$(echo $version_description | sed 's/"/\\"/g')
+
+AC_DEFINE_UNQUOTED([VERSION_NAME], ["$version_name"], [UST version name])
+AC_DEFINE_UNQUOTED([VERSION_DESCRIPTION], ["$version_description_c"], [UST version description])
+
+AC_PROG_GREP
+AC_PROG_LN_S
+# libtool link_all_deplibs fixup. See http://bugs.lttng.org/issues/321.
+AC_ARG_ENABLE(libtool-linkdep-fixup,
+ AS_HELP_STRING([--disable-libtool-linkdep-fixup],
+ [disable the libtool fixup for linking all dependent libraries (link_all_deplibs)]),
+ libtool_fixup=$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_MAKE_SET
LT_INIT
-## Checks for libraries.
-AC_CHECK_LIB([dl], [dlopen])
-AC_CHECK_LIB([pthread], [pthread_create])
+# 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])
+ if test "$check_cxx_designated_initializers" = "yes"; then
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+ struct foo { int a; int b; };
+ void fct(void)
+ {
+ struct foo f = { .a = 0, .b = 1 };
+ }
+ ]])],[
+ rw_cv_prog_cxx_works=yes
+ ],[
+ rw_cv_prog_cxx_works=no
+ ])
+ fi
+ AC_LANG_POP([C++])])
+
+AM_CONDITIONAL([CXX_WORKS], [test "x$rw_cv_prog_cxx_works" = "xyes"])
+
+# Check if the compiler support weak symbols
+AX_SYS_WEAK_ALIAS
+
+if test "x${ax_cv_sys_weak_alias}" = "xno"; then
+ AC_MSG_ERROR([Your platform doesn't support weak symbols.])
+fi
-# Check for libuuid
-AC_CHECK_LIB([uuid], [uuid_generate],
+## Checks for libraries.
+AC_CHECK_LIB([dl], [dlopen],
[
- AC_DEFINE_UNQUOTED([LTTNG_UST_HAVE_LIBUUID], 1, [Has libuuid support.])
+ have_libdl=yes
],
[
- # libuuid not found, check for uuid_create in libc.
- AC_CHECK_LIB([c], [uuid_create],
+ #libdl not found, check for dlopen in libc.
+ AC_CHECK_LIB([c], [dlopen],
[
- AC_DEFINE_UNQUOTED([LTTNG_UST_HAVE_LIBC_UUID], 1, [Has libc uuid support.])
+ have_libc_dl=yes
],
[
- AC_MSG_ERROR([Cannot find libuuid uuid_generate nor libc uuid_create. Use [LDFLAGS]=-Ldir to specify its location.])
+ AC_MSG_ERROR([Cannot find dlopen in libdl nor libc. Use [LDFLAGS]=-Ldir to specify their location.])
])
-]
-)
+])
+AM_CONDITIONAL([LTTNG_UST_BUILD_WITH_LIBDL], [test "x$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.
#AC_CHECK_HEADERS([fcntl.h stdint.h stdlib.h string.h sys/socket.h sys/time.h unistd.h])
CFLAGS="-Wall $CFLAGS"
-# Check for texinfo, required for building the documentation
-# TODO: make this (and building the documentation) optional
-AC_CHECK_PROG([TEXINFO], [makeinfo], [yes])
-AS_IF([test "x$TEXINFO" != "xyes"],[
- AC_MSG_ERROR([Please install the 'texinfo' program and make sure 'makeinfo' is in the PATH.])
-])
-
# 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>
# 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], [])
-# Check for various supplementary host information (beyond the
-# triplet) which might affect the library format choices. E.g., we
-# can be building with `i686-unknown-linux-gnu-gcc -m64'
-
-case "${host}" in
+# Perf event counters are only supported on x86 so far.
+AC_MSG_CHECKING([UST support for architecture perf event counters])
+case $host_cpu in
changequote(,)dnl
- i[34567]86-*-linux*)
+ i[3456]86)
changequote([,])dnl
- AC_CACHE_CHECK([if building for x86-64], [ust_cv_i386_is_x86_64],
- [save_CPPFLAGS="$CPPFLAGS"
- CPPFLAGS="$CPPFLAGS $CFLAGS"
- AC_EGREP_CPP([got it], [
-#if __x86_64__
-got it
-#endif
- ], [ust_cv_i386_is_x86_64=yes],
- [ust_cv_i386_is_x86_64=no])
- CPPFLAGS="$save_CPPFLAGS"])
- ;;
+ 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;;
esac
+AC_MSG_RESULT([$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS])
+
+AM_CONDITIONAL([HAVE_PERF_EVENT], [test "x$have_perf_event" = "xyes" -a "x$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS" = "xyes"])
-AC_MSG_CHECKING([library format for the host system])
+if test "x$have_perf_event" = "xyes" -a "x$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS" = "xyes"; then
+AC_DEFINE([LTTNG_UST_HAVE_PERF_EVENT], [1])
+fi
+
+AC_MSG_CHECKING([host system alignment requirements])
case $host_cpu in
changequote(,)dnl
i[3456]86)
changequote([,])dnl
- if test "$ust_cv_i386_is_x86_64" = yes ; then
- LIBFORMAT="elf64-x86-64"
- else
- LIBFORMAT="elf32-i386"
- fi
;;
- x86_64) LIBFORMAT="elf64-x86-64" ;;
- powerpc) LIBFORMAT="elf32-powerpc" ;;
- ppc64) LIBFORMAT="elf64-powerpc" ;;
- powerpc64) LIBFORMAT="elf64-powerpc" ;;
- s390) LIBFORMAT="elf32-s390"; NO_UNALIGNED_ACCESS=1 ;;
- s390x) LIBFORMAT="elf64-s390"; NO_UNALIGNED_ACCESS=1 ;;
- armv5) LIBFORMAT="elf32-littlearm"; NO_UNALIGNED_ACCESS=1 ;;
- arm) LIBFORMAT="elf32-littlearm"; NO_UNALIGNED_ACCESS=1 ;;
- mips*) LIBFORMAT=""; NO_UNALIGNED_ACCESS=1;;
- *) AC_MSG_ERROR([unable to detect library format (unsupported architecture ($host_cpu)?)]) ;;
+ x86_64) ;;
+ amd64) ;;
+ powerpc) ;;
+ ppc64) ;;
+ ppc64le) ;;
+ powerpc64) ;;
+ powerpc64le) ;;
+ s390) NO_UNALIGNED_ACCESS=1 ;;
+ s390x) NO_UNALIGNED_ACCESS=1 ;;
+ arm*) NO_UNALIGNED_ACCESS=1 ;;
+ aarch64) NO_UNALIGNED_ACCESS=1 ;;
+ mips*) NO_UNALIGNED_ACCESS=1 ;;
+ tile*) NO_UNALIGNED_ACCESS=1 ;;
+ *)
+ UNSUPPORTED_ARCH=1
+ NO_UNALIGNED_ACCESS=1
+ ;;
esac
-AC_SUBST(LIBFORMAT)
-AC_MSG_RESULT($LIBFORMAT)
-
-if test "x$host_cpu" = "xarm" ; then
-AC_MSG_CHECKING([checking for armv5])
-AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
-#ifndef __ARM_ARCH_5TEJ__
-#error "no arm5 here"
-#endif
-]])],[
- AC_MSG_RESULT([yes])
- NO_UNALIGNED_ACCESS=1
-
-],[
- AC_MSG_RESULT([no])
+AC_MSG_RESULT([$host_cpu])
-])
-fi
if test x$NO_UNALIGNED_ACCESS = x ; then
AC_DEFINE([LTTNG_UST_HAVE_EFFICIENT_UNALIGNED_ACCESS], [1])
fi
-# Set compile flags to java include files if given
-AC_ARG_WITH([java-jdk],
- [AS_HELP_STRING([--with-java-jdk=DIR],[use the Java JDK in DIR. Ex : $JAVA_HOME.])],
- [JAVA_JDK=$withval],
- [JAVA_JDK=""]
-)
-AS_IF([test $JAVA_JDK],[
- AS_IF([test -d $JAVA_JDK],[
- AC_MSG_RESULT([using Java includes in $JAVA_SDK])
- SUBDIRS=`find $JAVA_JDK/include -type d`
- CPPFLAGS+=" "
- CPPFLAGS+=`for x in $SUBDIRS; do echo -n "-I$x "; done`
- CPPFLAGS+=" "
- ],[
- AC_MSG_ERROR(Unable to find Java include files in $JAVA_JDK)
- ])
-])
-
# Check for JNI header files if requested
-AC_ARG_WITH([jni-interface],
- [AS_HELP_STRING([--with-jni-interface],[build JNI interface between C and Java. Needs Java include files [default=no]])],
- [jni_interface=$withval],
+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=$enableval],
[jni_interface=no]
)
-AS_IF([test "x$jni_interface" = "xyes"],[
- AC_CHECK_HEADERS([jni.h],[],[
- AC_MSG_ERROR([missing jni.h
-Make sure Sun Java, OpenJDK or GCJ is installed and that this header file exists in the system path.
-Use the --with-java-jdk=DIR flag to point to your Java include files, or disable the JNI interface.])
- ])
-])
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$java_agent_log4j" = "xyes"])
+
+if test "x$jni_interface" = "xyes" || test "x$java_agent_jul" = "xyes" || test "x$java_agent_log4j" = "xyes"; then
+ 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$JNI_INCLUDE_DIR"
+ done
+
+ AX_PROG_JAVAH
+fi
+
+if test "x$java_agent_log4j" = "xyes"; then
+ AX_CHECK_CLASSPATH
+
+ AX_CHECK_CLASS(org.apache.log4j.Logger)
+
+ if test "x$ac_cv_class_org_apache_log4j_Logger" = "xno"; then
+ AC_MSG_ERROR([The UST Java agent support for log4j was requested but the Log4j classes were not found. Please specify the location of the Log4j jar via the Java CLASSPATH e.g: export CLASSPATH="/path/to/log4j.jar"])
+ fi
+fi
+
+# Option to build the python agent
+AC_ARG_ENABLE([python-agent],
+ [AS_HELP_STRING([--enable-python-agent],[build the LTTng UST Python agent [default=no]])],
+ [python_agent=$enableval],
+ [:]
+)
+AM_CONDITIONAL([BUILD_PYTHON_AGENT], [test "x$python_agent" = "xyes"])
+if test "x$python_agent" = "xyes"; then
+ AM_PATH_PYTHON([2.7])
+fi
+
# sdt.h integration
AC_ARG_WITH([sdt],
[AS_HELP_STRING([--with-sdt],[provide SystemTap integration via sdt.h [default=no]])],
])
])
-#currently disabled.
- #tests/hello2/Makefile
- #tests/basic/Makefile
- #tests/simple_include/Makefile
- #tests/snprintf/Makefile
- #tests/test-nevents/Makefile
- #tests/test-libustinstr-malloc/Makefile
- #tests/dlopen/Makefile
- #tests/same_line_marker/Makefile
- #tests/trace_event/Makefile
- #tests/tracepoint/Makefile
- #tests/tracepoint/benchmark/Makefile
- #tests/register_test/Makefile
- #tests/libustctl_function_#tests/Makefile
- #tests/exit-fast/Makefile
- #tests/basic_long/Makefile
+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 $BUILD_GEN_TP_EXAMPLES], [Build examples requiring lttng-gen-tp])
AC_CONFIG_FILES([
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/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-static-lib/Makefile
tests/hello.cxx/Makefile
- tests/demo/Makefile
- tests/fork/Makefile
- tests/ust-basic-tracing/Makefile
- tests/ust-multi-test/Makefile
+ tests/same_line_tracepoint/Makefile
+ tests/snprintf/Makefile
+ tests/ust-elf/Makefile
+ tests/benchmark/Makefile
+ tests/utils/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("Version name: $version_name")
+AS_ECHO("$version_description")
+
# Report on the configuration options
AS_ECHO()
AS_ECHO("LTTng-UST will be built with the following options:")
-AS_ECHO("Library format: $LIBFORMAT")
AS_ECHO()
-AS_ECHO_N("Java support (JNI): ")
+
+AS_ECHO_N("Java agent (JUL support): ")
+AS_IF([test "x$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("sdt.h integration: ")
+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.")