meson: add dtrace build dependency

Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Neal Gompa <ngompa13@gmail.com>

configure.ac

@@ -73,10 +73,6 @@ case $host in
   *-*-mingw* | *-*-msvc* ) with_win=yes ;;
 esac
 
-if test $with_linux = no; then
-    with_dtrace=no
-fi
-
 AM_CONDITIONAL([WITH_LINUX], [test "$with_linux" = "yes"])
 AM_CONDITIONAL([WITH_FREEBSD], [test "$with_freebsd" = "yes"])
 AM_CONDITIONAL([WITH_MACOS], [test "$with_macos" = "yes"])
@@ -101,7 +97,6 @@ dnl
 dnl Miscellaneous checks
 dnl
 
-LIBVIRT_ARG_DTRACE
 LIBVIRT_ARG_NUMAD
 LIBVIRT_ARG_INIT_SCRIPT
 LIBVIRT_ARG_LOADER_NVRAM
@@ -111,7 +106,6 @@ LIBVIRT_ARG_TLS_PRIORITY
 LIBVIRT_ARG_SYSCTL_CONFIG
 
 
-LIBVIRT_CHECK_DTRACE
 LIBVIRT_CHECK_NUMAD
 LIBVIRT_CHECK_INIT_SCRIPT
 LIBVIRT_CHECK_LOADER_NVRAM
@@ -187,7 +181,6 @@ LIBVIRT_WIN_RESULT_WINDRES
 AC_MSG_NOTICE([])
 AC_MSG_NOTICE([Miscellaneous])
 AC_MSG_NOTICE([])
-LIBVIRT_RESULT_DTRACE
 LIBVIRT_RESULT_NUMAD
 LIBVIRT_RESULT_INIT_SCRIPT
 LIBVIRT_RESULT_LOADER_NVRAM

m4/virt-dtrace.m4

@@ -1,45 +0,0 @@
-dnl The DTrace static probes
-dnl
-dnl Copyright (C) 2016 Red Hat, Inc.
-dnl
-dnl This library is free software; you can redistribute it and/or
-dnl modify it under the terms of the GNU Lesser General Public
-dnl License as published by the Free Software Foundation; either
-dnl version 2.1 of the License, or (at your option) any later version.
-dnl
-dnl This library is distributed in the hope that it will be useful,
-dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
-dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-dnl Lesser General Public License for more details.
-dnl
-dnl You should have received a copy of the GNU Lesser General Public
-dnl License along with this library.  If not, see
-dnl <http://www.gnu.org/licenses/>.
-dnl
-
-AC_DEFUN([LIBVIRT_ARG_DTRACE], [
-  LIBVIRT_ARG_WITH([DTRACE], [use dtrace for static probing], [check])
-])
-
-AC_DEFUN([LIBVIRT_CHECK_DTRACE], [
-  if test "$with_dtrace" != "no" ; then
-    AC_PATH_PROG([DTRACE], [dtrace], [], [$LIBVIRT_SBIN_PATH])
-    if test -z "$DTRACE" ; then
-      if test "$with_dtrace" = "check"; then
-        with_dtrace=no
-      else
-        AC_MSG_ERROR([You must install the 'dtrace' binary to enable libvirt static probes])
-      fi
-    else
-      with_dtrace=yes
-    fi
-    if test "$with_dtrace" = "yes"; then
-      AC_DEFINE_UNQUOTED([WITH_DTRACE_PROBES], 1, [whether DTrace static probes are available])
-    fi
-  fi
-  AM_CONDITIONAL([WITH_DTRACE_PROBES], [test "$with_dtrace" != "no"])
-])
-
-AC_DEFUN([LIBVIRT_RESULT_DTRACE], [
-  LIBVIRT_RESULT([DTrace], [$with_dtrace])
-])

meson.build

@@ -2085,6 +2085,13 @@ if conf.has('WITH_LIBVIRTD')
   driver_modules_flags = libvirt_export_dynamic
 endif
 
+if host_machine.system() == 'linux'
+  dtrace_prog = find_program('dtrace', required: get_option('dtrace'), dirs: libvirt_sbin_path)
+  if dtrace_prog.found()
+    conf.set('WITH_DTRACE_PROBES', 1)
+  endif
+endif
+
 
 # define top include directory
 
@@ -2208,6 +2215,7 @@ summary(test_summary, section: 'Test suite', bool_yn: true)
 misc_summary = {
   'Use -Werror': cc_flags.contains('-Werror'),
   'Warning Flags': supported_cc_flags,
+  'DTrace': conf.has('WITH_DTRACE_PROBES'),
   'Char device locks': chrdev_lock_files,
 }
 summary(misc_summary, section: 'Miscellaneous', bool_yn: true, list_sep: ' ')

meson_options.txt

@@ -92,3 +92,4 @@ option('storage_zfs', type: 'feature', value: 'auto', description: 'ZFS backend
 
 # build feature options
 option('chrdev_lock_files', type: 'string', value: '', description: 'location for UUCP style lock files for character devices (leave empty for default paths on some platforms)')
+option('dtrace', type: 'feature', value: 'auto', description: 'use dtrace for static probing')