+# Checks for programs.
+AC_PROG_SED
+AC_PROG_GREP
+AC_PROG_LN_S
+AC_PROG_MKDIR_P
+AC_PROG_MAKE_SET
+AC_CHECK_PROG([HAVE_CMAKE], [cmake], ["yes"])
+AM_CONDITIONAL([HAVE_CMAKE], [test "x$HAVE_CMAKE" = "xyes"])
+
+# libtool link_all_deplibs fixup. See http://bugs.lttng.org/issues/321.
+AC_ARG_ENABLE([libtool-linkdep-fixup], [
+AS_HELP_STRING([--disable-libtool-linkdep-fixup], [disable the libtool fixup for linking all dependent libraries (link_all_deplibs)])
+], [
+ libtool_fixup=$enableval
+], [
+ libtool_fixup=yes
+])
+
+AS_IF([test "x$libtool_fixup" = "xyes"], [
+ libtool_m4="$srcdir/m4/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" $libtool_m4
+ ], [
+ AC_MSG_RESULT([none])
+ ])
+])
+LT_INIT([disable-static])
+
+AC_MSG_CHECKING([whether shared libraries are enabled])
+AS_IF([test "x$enable_shared" = "xyes"], [
+ AC_MSG_RESULT([yes])
+], [
+ AC_MSG_RESULT([no])
+ AC_MSG_ERROR([LTTng-UST requires shared libraries to be enabled])
+])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_C_INLINE
+AC_TYPE_INT8_T
+AC_TYPE_INT16_T
+AC_TYPE_INT32_T
+AC_TYPE_INT64_T
+AC_TYPE_MODE_T
+AC_TYPE_OFF_T
+AC_TYPE_PID_T
+AC_TYPE_SIZE_T
+AC_TYPE_SSIZE_T
+AC_TYPE_UID_T
+AC_TYPE_UINT8_T
+AC_TYPE_UINT16_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+AC_CHECK_TYPES([ptrdiff_t])
+
+AX_C___ATTRIBUTE__
+AS_IF([test "x$ax_cv___attribute__" = "xyes"],
+ [:],
+ [AC_MSG_ERROR([The compiler does not support __attribute__ extensions])])
+
+# Checks for library functions.
+AC_FUNC_CHOWN
+AC_FUNC_FORK
+AC_FUNC_MMAP
+AC_FUNC_REALLOC
+AC_FUNC_STRERROR_R
+AC_FUNC_STRNLEN
+AC_CHECK_FUNCS([ \
+ atexit \
+ clock_gettime \
+ ftruncate \
+ getpagesize \
+ gettimeofday \
+ localeconv \
+ memchr \
+ memmove \
+ memset \
+ mkdir \
+ munmap \
+ realpath \
+ sched_getcpu \
+ socket \
+ strchr \
+ strdup \
+ strerror \
+ strtol \
+ sysconf \
+])
+
+# AC_FUNC_MALLOC causes problems when cross-compiling.
+#AC_FUNC_MALLOC
+
+# Checks for header files.
+AC_HEADER_STDBOOL
+AC_CHECK_HEADERS([ \
+ arpa/inet.h \
+ fcntl.h \
+ float.h \
+ limits.h \
+ locale.h \
+ stddef.h \
+ sys/socket.h \
+ sys/time.h \
+ wchar.h \
+])
+
+# Set architecture specific options
+AS_CASE([$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
+ NO_NUMA=1
+ ],
+ [aarch64*], [NO_UNALIGNED_ACCESS=1],
+ [mips*], [NO_UNALIGNED_ACCESS=1],
+ [tile*], [NO_UNALIGNED_ACCESS=1],
+ [
+ UNSUPPORTED_ARCH=1
+ NO_UNALIGNED_ACCESS=1
+ ])
+
+# Configuration options, which will be installed in the 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])
+
+# Checks for libraries.
+AC_CHECK_LIB([dl], [dlopen], [