X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=configure.ac;h=7dcaab85eaa7cf1815b988b13132b6574a9c91a0;hb=refs%2Fheads%2Fust-app-context;hp=221ab46261e4e55284706152f6a6c9e455807477;hpb=8e2d61c8fc402a360a3634d895ad28e201e7b7bd;p=deliverable%2Flttng-ust.git diff --git a/configure.ac b/configure.ac index 221ab462..7dcaab85 100644 --- a/configure.ac +++ b/configure.ac @@ -1,19 +1,25 @@ # -*- Autoconf -*- # Process this file with autoconf to produce a configure script. -AC_INIT([lttng-ust],[2.0.0-rc3],[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]) @@ -21,6 +27,7 @@ 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 @@ -34,6 +41,40 @@ AC_DEFINE_UNQUOTED([VERSION_MAJOR], $major_version, [UST major version number]) 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 @@ -41,14 +82,67 @@ 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]) + 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${ax_cv_sys_weak_alias}" = "xno"; then + AC_MSG_ERROR([Your platform doesn't support weak symbols.]) +fi + ## Checks for libraries. -AC_CHECK_LIB([dl], [dlopen]) +AC_CHECK_LIB([dl], [dlopen], +[ + have_libdl=yes +], +[ + #libdl not found, check for dlopen in libc. + AC_CHECK_LIB([c], [dlopen], + [ + have_libc_dl=yes + ], + [ + AC_MSG_ERROR([Cannot find dlopen in libdl nor libc. Use [LDFLAGS]=-Ldir to specify their location.]) + ]) +]) +AM_CONDITIONAL([LTTNG_UST_BUILD_WITH_LIBDL], [test "x$have_libdl" = "xyes"]) +AM_CONDITIONAL([LTTNG_UST_BUILD_WITH_LIBC_DL], [test "x$have_libc_dl" = "xyes"]) + AC_CHECK_LIB([pthread], [pthread_create]) -# Check for libuuid -AC_CHECK_LIB([uuid], [uuid_generate], [], - [AC_MSG_ERROR([Cannot find libuuid. Use [LDFLAGS]=-Ldir to specify its location.])] -) +# Check for dlfcn.h +AC_CHECK_HEADER([dlfcn.h]) +AS_IF([test "x${ac_cv_header_dlfcn_h}" = "xyes"], + [AC_CHECK_DECLS([RTLD_DI_LINKMAP],,, + [#define _GNU_SOURCE /* Required on Linux to get GNU extensions */ + #include ]) + ], + [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]) @@ -74,19 +168,17 @@ AC_CHECK_FUNCS([gettimeofday munmap socket strerror strtol sched_getcpu sysconf] 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 @@ -109,106 +201,128 @@ AC_CHECK_LIB([urcu-bp], [synchronize_rcu_bp], [], [AC_MSG_ERROR([Cannot find lib # 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$UST_SUPPORT_FOR_ARCH_PERF_EVENT_COUNTERS" = "xyes"]) + +if test "x$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([library format for the host system]) +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) +AC_MSG_RESULT([$host_cpu]) -if test "x$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]) - -]) -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]])], @@ -234,22 +348,26 @@ AS_IF([test "x$with_sdt" = "xyes"],[ ]) ]) -#currently disabled. - #tests/hello2/Makefile - #tests/basic/Makefile - #tests/simple_include/Makefile - #tests/snprintf/Makefile - #tests/test-nevents/Makefile - #tests/test-libustinstr-malloc/Makefile - #tests/dlopen/Makefile - #tests/same_line_marker/Makefile - #tests/trace_event/Makefile - #tests/tracepoint/Makefile - #tests/tracepoint/benchmark/Makefile - #tests/register_test/Makefile - #tests/libustctl_function_#tests/Makefile - #tests/exit-fast/Makefile - #tests/basic_long/Makefile +AC_MSG_CHECKING([whether shared libraries are enabled]) +AS_IF([test "x$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 @@ -263,34 +381,77 @@ AC_CONFIG_FILES([ 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-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 + 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("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.")