dnl A macro to check the availability of systemtap user-space probes

AC_DEFUN([AM_CHECK_SYSTEMTAP],

[

AC_ARG_ENABLE([systemtap],

[AS_HELP_STRING([--enable-systemtap],

[Enable inclusion of systemtap trace support])],

[ENABLE_SYSTEMTAP="${enableval}"], [ENABLE_SYSTEMTAP='no'])

if test "x${ENABLE_SYSTEMTAP}" = xyes; then

AC_CHECK_PROGS(DTRACE, dtrace)

if test -z "$DTRACE"; then

AC_MSG_ERROR([dtrace not found])

fi

AC_CHECK_HEADER([sys/sdt.h], [SDT_H_FOUND='yes'],

[SDT_H_FOUND='no';

AC_MSG_ERROR([systemtap support needs sys/sdt.h header])])

AC_DEFINE([HAVE_SYSTEMTAP], [1], [Define to 1 if systemtap is enabled])

HAVE_SYSTEMTAP=1

AC_ARG_WITH([tapset-install-dir],

[AS_HELP_STRING([--with-tapset-install-dir],

[The absolute path where the tapset dir will be installed])],

[if test "x${withval}" = x; then

tapset_dir="\$(datadir)/systemtap/tapset"

else

tapset_dir="${withval}"

fi],

[tapset_dir="\$(datadir)/systemtap/tapset"])

AC_SUBST(tapset_dir)

fi

AM_CONDITIONAL([BUILD_SYSTEMTAP], [test x$HAVE_SYSTEMTAP = x1])

])