--- qsampler/trunk/configure.ac	2008/12/07 13:58:16	1803
+++ qsampler/trunk/configure.ac	2016/09/24 11:55:52	2988
@@ -1,19 +1,45 @@
 # Process this file with autoconf to produce a configure script.
-AC_INIT(Qsampler, 0.2.1.20, rncbc@rncbc.org, qsampler)
+AC_INIT(Qsampler, 0.4.1.2, rncbc@rncbc.org, qsampler)
 
-AC_CONFIG_SRCDIR(src/qsamplerMainForm.ui)
-AC_CONFIG_HEADERS(config.h)
-AC_CONFIG_FILES(Makefile qsampler.pro qsampler.spec qsampler.desktop)
+AC_CONFIG_SRCDIR(src/qsampler.cpp)
+AC_CONFIG_HEADERS(src/config.h)
+AC_CONFIG_FILES(Makefile qsampler.spec src/src.pri src/qsampler.desktop)
+
+# Sanitize version string.
+ac_version=$(echo $PACKAGE_VERSION | sed -r 's/^([0-9|\.]+).*$/\1/')
+AC_SUBST(ac_version)
 
 # Set default installation prefix.
 AC_PREFIX_DEFAULT(/usr/local)
-ac_prefix=$prefix
-if test "x$ac_prefix" = "xNONE"; then
-    ac_prefix=$ac_default_prefix
+if test "x$prefix" = "xNONE"; then
+   prefix=$ac_default_prefix
 fi
+if test "x$exec_prefix" = "xNONE"; then
+   exec_prefix=$prefix
+fi
+eval ac_prefix=$prefix
 AC_SUBST(ac_prefix)
 AC_DEFINE_UNQUOTED(CONFIG_PREFIX, ["$ac_prefix"], [Default installation prefix.])
 
+# Set default installation directories.
+eval ac_bindir=$bindir
+AC_SUBST(ac_bindir)
+AC_DEFINE_UNQUOTED(CONFIG_BINDIR, ["$ac_bindir"], [Default executable binary path.])
+
+eval ac_libdir=$libdir
+AC_SUBST(ac_libdir)
+AC_DEFINE_UNQUOTED(CONFIG_LIBDIR, ["$ac_libdir"], [Default object library path.])
+
+eval datarootdir=$datarootdir
+eval ac_datadir=$datadir
+AC_SUBST(ac_datadir)
+AC_DEFINE_UNQUOTED(CONFIG_DATADIR, ["$ac_datadir"], [Default arch-idependent data path.])
+
+eval ac_mandir=$mandir
+AC_SUBST(ac_mandir)
+AC_DEFINE_UNQUOTED(CONFIG_MANDIR, ["$ac_mandir"], [Default man page path.])
+
+
 # Enable debugging argument option.
 AC_ARG_ENABLE(debug,
   AC_HELP_STRING([--enable-debug], [enable debugging (default=no)]),
@@ -21,34 +47,61 @@
 
 if test "x$ac_debug" = "xyes"; then
    AC_DEFINE(CONFIG_DEBUG, 1, [Define if debugging is enabled.])
+   ac_stacktrace="yes"
    ac_debug="debug"
 else
+   ac_stacktrace="no"
    ac_debug="release"
 fi
 AC_SUBST(ac_debug)
 
+
+# Enable Qt4/5 availability.
+AC_ARG_ENABLE(qt4,
+  AC_HELP_STRING([--enable-qt4], [enable Qt4 build (default=no)]),
+  [ac_qt4="$enableval"],
+  [ac_qt4="no"])
+
+
 # Enable libgig availability.
 AC_ARG_ENABLE(libgig,
   AC_HELP_STRING([--enable-libgig], [enable libgig interface (default=yes)]),
   [ac_libgig="$enableval"],
   [ac_libgig="yes"])
 
+# Enable X11 unique/single instance.
+AC_ARG_ENABLE(xunique,
+  AC_HELP_STRING([--enable-xunique], [enable X11 unique/single instance (default=yes)]),
+  [ac_xunique="$enableval"],
+  [ac_xunique="yes"])
+
+# Enable debugger stack-trace option (assumes --enable-debug).
+AC_ARG_ENABLE(stacktrace,
+  AC_HELP_STRING([--enable-stacktrace], [enable debugger stack-trace (default=no)]),
+  [ac_stacktrace="$enableval"])
+
+
 # Standard installation base dirs.
-ac_with_paths="/usr /usr/local"
+ac_with_paths=""
 
-# Some a-la-debian alternatives...
-for X in /usr/lib /usr/share; do
-  for Y in qt qt4; do
-    if test -d $X/$Y/bin; then
-      ac_with_paths="$ac_with_paths $X/$Y"
-    fi
-  done
-done
+# Set for alternate Qt4/5 installation dir.
+AC_ARG_WITH(qt4,
+  AC_HELP_STRING([--with-qt4=PATH], [use alternate Qt4 install path]),
+  [ac_qt4_path="$withval"], [ac_qt4_path="no"])
 
-# Set for alternate Qt installation dir.
-AC_ARG_WITH(qt,
-  AC_HELP_STRING([--with-qt=PATH], [use alternate Qt install path]),
-  [ac_with_paths="$ac_with_paths $withval"])
+AC_ARG_WITH(qt5,
+  AC_HELP_STRING([--with-qt5=PATH], [use alternate Qt5 install path]),
+  [ac_qt5_path="$withval"], [ac_qt5_path="no"])
+
+if test "x$ac_qt4_path" != "xno"; then
+   ac_with_paths="$ac_with_paths $ac_qt4_path"
+   ac_qt4="yes"
+fi
+
+if test "x$ac_qt5_path" != "xno"; then
+   ac_with_paths="$ac_with_paths $ac_qt5_path"
+   ac_qt4="no"
+fi
 
 # Set for alternate liblscp installation dir.
 AC_ARG_WITH(liblscp,
@@ -60,72 +113,138 @@
   AC_HELP_STRING([--with-libgig=PATH], [use alternate libgig install path]),
   [ac_with_paths="$ac_with_paths $withval"])
 
+
+# Honor user specified flags.
+ac_cflags=$CFLAGS
+ac_ldflags=$LDFLAGS
+
+
 # Checks for programs.
-AC_PROG_CC
 AC_PROG_CPP
 AC_PROG_CXX
 AC_PROG_CXXCPP
-AC_PROG_GCC_TRADITIONAL
 
 # Checks for languages.
-AC_LANG_C
 AC_LANG_CPLUSPLUS
 
+# Check for pkg-config.
+PKG_PROG_PKG_CONFIG
+
+# Check for proper flags.
+ac_arch=`uname -m`
+
+# Check for install paths and alternatives...
+ac_libdirs="lib"
+
+if test "x$ac_arch" = "xx86_64"; then
+   ac_libdirs="$ac_libdirs lib64"
+fi
+
+CFLAGS="-fPIC $CFLAGS"
+CPPFLAGS="-fPIC $CPPFLAGS"
+
 # Prepend alternate dependencies paths.
 ac_path=$PATH
+
 for X in $ac_with_paths; do
   if test -d $X/bin; then
     ac_path="$X/bin:$ac_path"
   fi
-  if test -x $X/qmake; then
-    ac_path="$X:$ac_path"
-  fi
   if test -d $X/include; then
-    for Y in qt qt4; do
-      if test -d $X/include/$Y; then
-        CFLAGS="-I$X/include/$Y $CFLAGS"
-        CPPFLAGS="-I$X/include/$Y $CPPFLAGS"
-        ac_incpath="$X/include/$Y $ac_incpath"
-      fi
-    done
-    CFLAGS="-I$X/include $CFLAGS"
+    CFLAGS="-I$X/include $CFLAGS "
     CPPFLAGS="-I$X/include $CPPFLAGS"
     ac_incpath="$X/include $ac_incpath"
   fi
-  if test -d $X/lib64; then
-    LIBS="-L$X/lib64 $LIBS"
-    ac_libs="-L$X/lib64 $ac_libs"
-  fi
-  if test -d $X/lib; then
-    LIBS="-L$X/lib $LIBS"
-    ac_libs="-L$X/lib $ac_libs"
-  fi
+  for Y in $ac_libdirs; do
+    if test -d $X/$Y; then
+       LIBS="-L$X/$Y $LIBS"
+       ac_libs="-L$X/$Y $ac_libs"
+    fi
+  done
 done
 
-# Check for proper Qt version.
-AC_CACHE_CHECK([for Qt library version >= 4.1],
-  ac_qtlib_version, [
-  AC_TRY_LINK([#include "Qt/qglobal.h"], [
-#if QT_VERSION < 0x040100
-#error Qt library 4.1 or greater required.
-#endif
-    ],
-    ac_qtlib_version="yes", [
-      echo "no; Qt 4.1 or greater is required"
-      exit
-    ])
-])
-
 # A common error message:
-ac_errmsg="not found in current PATH. Maybe QT development environment isn't available (qt-devel)."
+ac_errmsg="not found in current PATH. Maybe QT development environment isn't available."
 
-# Check for Qt qmake utility.
-AC_PATH_PROG(ac_qmake, qmake, [no], $ac_path)
+if test "x$ac_qt4" = "xyes"; then
+   AC_PATH_PROG(ac_qmake, qmake-qt4, [no], $ac_path)
+else
+   AC_PATH_PROG(ac_qmake, qmake-qt5, [no], $ac_path)
+fi
+if test "x$ac_qmake" = "xno"; then
+   AC_PATH_PROG(ac_cv_qmake, qmake, [no], $ac_path)
+   ac_qmake=$ac_cv_qmake
+fi
 if test "x$ac_qmake" = "xno"; then
    AC_MSG_ERROR([qmake $ac_errmsg])
 fi
+
+# Check for proper Qt4/5 major version.
+ac_qt_version_major=`$ac_qmake -query QT_VERSION | cut -d. -f1`
+if test "x$ac_qt4" = "xyes"; then
+   if test "x$ac_qt_version_major" != "x4"; then
+      AC_MSG_ERROR([qmake-qt4 $ac_errmsg (qt4-devel)])
+   fi
+else
+   if test "x$ac_qt_version_major" != "x5"; then
+      AC_MSG_ERROR([qmake-qt5 $ac_errmsg (qt5-devel)])
+   fi
+fi
+
+ac_qt_install_bins=`$ac_qmake -query QT_INSTALL_BINS`
+if test -d $ac_qt_install_bins; then
+   ac_path="$ac_qt_install_bins:$ac_path"
+fi
+
+# Check it again, now with updated PATH, just in case...
+AC_PATH_PROG(ac_cv_qmake, qmake, [no], $ac_path)
+ac_qmake=$ac_cv_qmake
+if test "x$ac_qmake" = "xno"; then
+   AC_MSG_ERROR([qmake $ac_errmsg])
+fi
+
 AC_SUBST(ac_qmake)
 
+ac_qt_install_headers=`$ac_qmake -query QT_INSTALL_HEADERS`
+if test -d $ac_qt_install_headers; then
+   CFLAGS="-I$ac_qt_install_headers $CFLAGS "
+   CPPFLAGS="-I$ac_qt_install_headers $CPPFLAGS"
+   ac_incpath="$ac_qt_install_headers $ac_incpath"
+fi
+
+ac_qt_install_libs=`$ac_qmake -query QT_INSTALL_LIBS`
+if test -d $ac_qt_install_libs; then
+   LIBS="-L$ac_qt_install_libs $LIBS"
+   ac_libs="-L$ac_qt_install_libs $ac_libs"
+fi
+
+# Check for proper Qt4/5 version.
+if test "x$ac_qt4" = "xyes"; then
+   AC_CACHE_CHECK([for Qt library version >= 4.4],
+      ac_cv_qtversion, [
+      AC_TRY_COMPILE([#include "QtCore/qglobal.h"], [
+         #if QT_VERSION < 0x040400 || QT_VERSION >= 0x050000
+         #error Qt library 4.4 or greater required.
+         #endif
+      ], ac_cv_qtversion="yes", [
+         echo "no; Qt 4.4 or greater is required"
+         exit 1
+      ])
+   ])
+else
+   AC_CACHE_CHECK([for Qt library version >= 5.1],
+      ac_cv_qtversion, [
+      AC_TRY_COMPILE([#include "QtCore/qglobal.h"], [
+         #if QT_VERSION < 0x050100 || QT_VERSION >= 0x060000
+         #error Qt library 5.1 or greater required.
+         #endif
+      ], ac_cv_qtversion="yes", [
+         echo "no; Qt 5.1 or greater is required"
+         exit 1
+      ])
+   ])
+fi
+
 # Check for Qt moc utility.
 AC_PATH_PROG(ac_moc, moc, [no], $ac_path)
 if test "x$ac_moc" = "xno"; then
@@ -140,6 +259,21 @@
 fi
 AC_SUBST(ac_uic)
 
+# Check for Qt lupdate utility.
+AC_PATH_PROG(ac_lupdate, lupdate, [no], $ac_path)
+if test "x$ac_lupdate" = "xno"; then
+   AC_MSG_ERROR([lupdate $ac_errmsg])
+fi
+AC_SUBST(ac_lupdate)
+
+# Check for Qt lrelease utility.
+AC_PATH_PROG(ac_lrelease, lrelease, [no], $ac_path)
+if test "x$ac_release" = "xno"; then
+   AC_MSG_ERROR([lrelease $ac_errmsg])
+fi
+AC_SUBST(ac_lrelease)
+
+
 # Checks for libraries.
 AC_CHECK_LIB(m, main)
 AC_CHECK_LIB(X11, main)
@@ -152,31 +286,43 @@
 fi
 
 # Check for mandatory libraries.
-AC_CHECK_LIB(lscp, main, [ac_liblscp="yes"], [ac_liblscp="no"])
-if test "x$ac_liblscp" = "xno"; then
-   AC_MSG_ERROR([LSCP library not found.])
+PKG_CHECK_MODULES([LSCP], [lscp], [ac_liblscp="yes"], [ac_liblscp="no"])
+if test "x$ac_liblscp" = "xyes"; then
+   AC_DEFINE(CONFIG_LIBLSCP, 1, [Define if liblscp is available.])
+   ac_cflags="$ac_cflags $LSCP_CFLAGS"
+   ac_libs="$ac_libs $LSCP_LIBS"
+else
+   AC_MSG_ERROR([*** LSCP library not found (liblscp).])
 fi
-ac_libs="$ac_libs -llscp"
+
+case "{$host}" in
+   *mingw*)
+   ac_libs="$ac_libs -lws2_32"
+   LIBS="$LIBS -lws2_32"
+   ;;
+esac
 
 AC_CACHE_CHECK([for instrument_name in lscp_channel_info_t],
-  ac_instrument_name, [
+  ac_cv_instrument_name, [
   AC_TRY_COMPILE([#include "lscp/client.h"], [
 	lscp_channel_info_t info;
 	info.instrument_name = 0;
-    ], ac_instrument_name="yes", ac_instrument_name="no")
+    ], ac_cv_instrument_name="yes", ac_cv_instrument_name="no")
 ])
+ac_instrument_name=$ac_cv_instrument_name
 if test "x$ac_instrument_name" = "xyes"; then
    AC_DEFINE(CONFIG_INSTRUMENT_NAME, 1, [Define if instrument_name is available.])
 fi
 
 AC_CACHE_CHECK([for mute/solo in lscp_channel_info_t],
-  ac_mute_solo, [
+  ac_cv_mute_solo, [
   AC_TRY_COMPILE([#include "lscp/client.h"], [
 	lscp_channel_info_t info;
 	info.mute = 0;
 	info.solo = 0;
-    ], ac_mute_solo="yes", ac_mute_solo="no")
+    ], ac_cv_mute_solo="yes", ac_cv_mute_solo="no")
 ])
+ac_mute_solo=$ac_cv_mute_solo
 if test "x$ac_mute_solo" = "xyes"; then
    AC_CHECK_LIB(lscp, lscp_set_channel_mute, [ac_mute_solo="yes"], [ac_mute_solo="no"])
 fi
@@ -196,12 +342,13 @@
 if test "x$ac_fxsend" = "xyes"; then
   AC_DEFINE(CONFIG_FXSEND, 1, [Define if FX sends is available.])
   AC_CACHE_CHECK([for FX send level in lscp_fxsend_info_t],
-    ac_fxsend_level, [
+    ac_cv_fxsend_level, [
     AC_TRY_COMPILE([#include "lscp/client.h"], [
 	  lscp_fxsend_info_t info;
 	  info.level = 0.0f;
-      ], ac_fxsend_level="yes", ac_fxsend_level="no")
+      ], ac_cv_fxsend_level="yes", ac_cv_fxsend_level="no")
   ])
+  ac_fxsend_level=$ac_cv_fxsend_level
   if test "x$ac_fxsend_level" = "xyes"; then
 	  AC_DEFINE(CONFIG_FXSEND_LEVEL, 1, [Define if FX send level is available.])
   fi
@@ -212,12 +359,13 @@
 fi
 
 AC_CACHE_CHECK([for audio_routing array type],
-  ac_audio_routing, [
+  ac_cv_audio_routing, [
   AC_TRY_COMPILE([#include "lscp/client.h"], [
     lscp_channel_info_t info;
     char ch = info.audio_routing[0][0];
-    ], ac_audio_routing="no", ac_audio_routing="yes")
+    ], ac_cv_audio_routing="no", ac_cv_audio_routing="yes")
 ])
+ac_audio_routing=$ac_cv_audio_routing
 if test "x$ac_audio_routing" = "xyes"; then
    AC_DEFINE(CONFIG_AUDIO_ROUTING, 1, [Define if audio_routing is an integer array.])
 fi
@@ -233,30 +381,32 @@
 fi
 
 AC_CACHE_CHECK([for CHANNEL_MIDI LSCP event support in liblscp],
-  ac_lscp_channel_midi_event, [
+  ac_cv_channel_midi_event, [
   AC_TRY_COMPILE([
 	#include "lscp/client.h"
 	#include "lscp/event.h"
 	], [
 	lscp_event_t ev;
 	ev = LSCP_EVENT_CHANNEL_MIDI;
-    ], ac_lscp_channel_midi_event="yes", ac_lscp_channel_midi_event="no")
+    ], ac_cv_channel_midi_event="yes", ac_cv_channel_midi_event="no")
 ])
-if test "x$ac_lscp_channel_midi_event" = "xyes"; then
+ac_channel_midi_event=$ac_cv_channel_midi_event
+if test "x$ac_channel_midi_event" = "xyes"; then
    AC_DEFINE(CONFIG_EVENT_CHANNEL_MIDI, 1, [Define if LSCP CHANNEL_MIDI event support is available.])
 fi
 
 AC_CACHE_CHECK([for DEVICE_MIDI LSCP event support in liblscp],
-  ac_lscp_device_midi_event, [
+  ac_cv_device_midi_event, [
   AC_TRY_COMPILE([
 	#include "lscp/client.h"
 	#include "lscp/event.h"
 	], [
 	lscp_event_t ev;
 	ev = LSCP_EVENT_DEVICE_MIDI;
-    ], ac_lscp_device_midi_event="yes", ac_lscp_device_midi_event="no")
+    ], ac_cv_device_midi_event="yes", ac_cv_device_midi_event="no")
 ])
-if test "x$ac_lscp_device_midi_event" = "xyes"; then
+ac_device_midi_event=$ac_cv_device_midi_event
+if test "x$ac_device_midi_event" = "xyes"; then
    AC_DEFINE(CONFIG_EVENT_DEVICE_MIDI, 1, [Define if LSCP DEVICE_MIDI event support is available.])
 fi
 
@@ -267,33 +417,16 @@
 
 # Check for optional libraries.
 if test "x$ac_libgig" = "xyes"; then
-   AC_CHECK_LIB(gig, main, [ac_libgig="yes"], [ac_libgig="no"])
-   if test "x$ac_libgig" = "xyes"; then
-      AC_DEFINE(CONFIG_LIBGIG, 1, [Define if libgig is available.])
-      ac_libs="$ac_libs -lgig"
-      AC_MSG_CHECKING([for gig::File::SetAutoLoad() method in libgig])
-      AC_LANG_SAVE
-      AC_LANG_CPLUSPLUS
-      CXXFLAGS="$ac_libs"
-      AC_TRY_RUN([
-#include <stdlib.h>
-#include <gig.h>
-int main() {
-    gig::File file;
-    file.SetAutoLoad(false);
-    exit(0);
-}
-      ],
-      have_libgig_setautoload="yes",
-      have_libgig_setautoload="no",
-      have_libgig_setautoload="no"
-      )
-      AC_LANG_RESTORE
-      AC_MSG_RESULT([$have_libgig_setautoload])
-      if test "x$have_libgig_setautoload" = "xyes"; then
-          AC_DEFINE(HAVE_LIBGIG_SETAUTOLOAD, 1, [Define if libgig provides gig::File::SetAutoLoad() method.])
-      fi
-   fi
+   PKG_CHECK_MODULES([GIG], [gig >= 3.3.0], [ac_libgig="yes"], [ac_libgig="no"])
+fi
+if test "x$ac_libgig" = "xyes"; then
+   AC_DEFINE(CONFIG_LIBGIG, 1, [Define if libgig is available.])
+   ac_cflags="$ac_cflags $GIG_CFLAGS"
+   ac_libs="$ac_libs $GIG_LIBS"
+   AC_DEFINE(CONFIG_LIBGIG_SETAUTOLOAD, 1, [Define if libgig provides gig::File::SetAutoLoad() method.])
+   ac_libgig_setautoload="yes"
+else
+   AC_MSG_WARN([*** GIG library not found (libgig).])
 fi
 
 # Check for round math function.
@@ -302,19 +435,46 @@
    AC_DEFINE(CONFIG_ROUND, 1, [Define if round is available.])
 fi
 
+# Check for X11 unique/single instance.
+if test "x$ac_xunique" = "xyes"; then
+   AC_DEFINE(CONFIG_XUNIQUE, 1, [Define if X11 unique/single instance is enabled.])
+fi
+
+# Check for debugging stack-trace.
+if test "x$ac_stacktrace" = "xyes"; then
+   AC_DEFINE(CONFIG_STACKTRACE, 1, [Define if debugger stack-trace is enabled.])
+fi
+
+# Some recent distros (eg. fedora, debian) require this.
+if test "x$ac_cv_lib_X11_main" = "xyes"; then
+   ac_libs="$ac_libs -lX11"
+fi
+
 AC_SUBST(ac_libs)
-AC_SUBST(ac_incpath)
+
 
 # Checks for header files.
 AC_HEADER_STDC
 AC_HEADER_SYS_WAIT
-AC_CHECK_HEADERS(fcntl.h sys/ioctl.h unistd.h signal.h)
+AC_CHECK_HEADERS(fcntl.h sys/ioctl.h unistd.h signal.h sys/socket.h)
 
 AC_CHECK_HEADER(lscp/client.h, [ac_lscp_h="yes"], [ac_lscp_h="no"])
 if test "x$ac_lscp_h" = "xno"; then
    AC_MSG_ERROR([LSCP headers not found.])
 fi
 
+if test "x$ac_libgig" = "xyes"; then
+   AC_CHECK_HEADER(libgig/SF.h, [ac_libgig_sf2="yes"], [ac_libgig_sf2="no"])
+   if test "x$ac_libgig_sf2" = "xyes"; then
+      AC_DEFINE(CONFIG_LIBGIG_SF2, 1, [Define if libgig/SF.h is available.])
+   fi
+fi
+
+AC_SUBST(ac_incpath)
+AC_SUBST(ac_cflags)
+AC_SUBST(ac_ldflags)
+
+
 # Checks for typedefs, structures, and compiler characteristics.
 # AC_C_CONST
 
@@ -344,12 +504,16 @@
 echo "  LSCP edit instrument support . . . . . . . . . . .: $ac_edit_instrument"
 echo "  GigaSampler instrument file support (libgig) . . .: $ac_libgig"
 if test "x$ac_libgig" = "xyes"; then
-echo "  libgig supports fast information retrieval . . . .: $have_libgig_setautoload"
+echo "  libgig supports fast information retrieval . . . .: $ac_libgig_setautoload"
+echo "  libgig supports SoundFont2 instruments files . . .: $ac_libgig_sf2"
 fi
-echo "  LSCP channel MIDI event support  . . . . . . . . .: $ac_lscp_channel_midi_event"
-echo "  LSCP device MIDI event support . . . . . . . . . .: $ac_lscp_device_midi_event"
+echo "  LSCP channel MIDI event support  . . . . . . . . .: $ac_channel_midi_event"
+echo "  LSCP device MIDI event support . . . . . . . . . .: $ac_device_midi_event"
 echo "  LSCP runtime max. voices / disk streams support  .: $ac_max_voices"
 echo
+echo "  X11 Unique/Single instance . . . . . . . . . . . .: $ac_xunique"
+echo "  Debugger stack-trace (gdb) . . . . . . . . . . . .: $ac_stacktrace"
+echo
 echo "  Install prefix . . . . . . . . . . . . . . . . . .: $ac_prefix"
 echo
 echo "Now type 'make', followed by 'make install' as root."