http://packetstormsecurity.org/UNIX/admin/xscreensaver-4.02.tar.gz
[xscreensaver] / configure.in
index 68a89a58dff7c62e6bb81e473fcc44d9970d7b65..f965a9cf5635694cd7683f9d760e3babd34faff7 100644 (file)
@@ -1,6 +1,7 @@
 # configure.in --- xscreensaver, Copyright (c) 1997-2000 Jamie Zawinski.
 #
 
+AC_PREREQ(2.13)
 AC_INIT(driver/subprocs.c)
 AC_CONFIG_HEADER(config.h)
 
@@ -746,6 +747,7 @@ AC_NO_CPLUSPLUS_COMMENTS_IN_C_CODE
 AC_PROG_CPP
 AC_C_CONST
 AC_C_INLINE
+AC_EXEEXT
 AC_DEMAND_BC
 
 # stuff for Makefiles
@@ -771,7 +773,7 @@ AC_HEADER_TIME
 AC_HEADER_SYS_WAIT
 AC_HEADER_DIRENT
 AC_GETTIMEOFDAY_ARGS
-AC_CHECK_FUNCS(select fcntl uname nice setpriority getcwd getwd putenv)
+AC_CHECK_FUNCS(select fcntl uname nice setpriority getcwd getwd putenv sbrk)
 
 AC_CHECK_FUNCS(sigaction syslog realpath setrlimit)
 AC_CHECK_ICMP
@@ -871,8 +873,7 @@ AC_ARG_WITH(hackdir,[
 Installation options:
 
   --with-hackdir=DIR      Where to install the hundreds of demo executables.
-                          Default: \`PREFIX/lib/xscreensaver/'
-],
+                          Default: \`PREFIX/lib/xscreensaver/'],
   [with_hackdir="$withval"; with_hackdir_req="$withval"],[with_hackdir=yes])
 
 if test x"$with_hackdir" = xyes; then
@@ -934,16 +935,13 @@ else
   # there must be a better way than this...
   if test -z "`echo $with_configdir | sed 's@^/.*@@'`" ; then
     # absolute path
-    CONFIGDIR=$with_configdir
+    HACK_CONF_DIR=$with_configdir
   else
     # relative path
-    CONFIGDIR="\${exec_prefix}$with_configdir"
+    HACK_CONF_DIR="\${exec_prefix}$with_configdir"
   fi
 fi
 
-# canonicalize slashes.
-CONFIGDIR=`echo "${CONFIGDIR}" | sed 's@/$@@;s@//*@/@g'`
-
 
 
 
@@ -1516,8 +1514,8 @@ if test "$enable_locking" = yes -a "$with_kerberos" = yes; then
     # (who got it from amu@mit.edu)
     PASSWD_LIBS="$PASSWD_LIBS -lkrb4 -ldes425 -lkrb5 -lk5crypto -lcrypt -lcom_err"
   elif test "$have_kerberos" = yes ; then
-    # from Tim Showalter <tjs+@andrew.cmu.edu>
-    PASSWD_LIBS="$PASSWD_LIBS -lkrb -ldes"
+    # from Tim Showalter <tjs@psaux.com> for FreeBSD 4.2
+    PASSWD_LIBS="$PASSWD_LIBS -lkrb -ldes -lcom_err"
   fi
 
   if test "$have_kerberos" = yes ; then
@@ -1839,21 +1837,21 @@ jurassic_gtk=no
 if test "$with_gtk" = yes; then
   have_gtk=no
   
-  # if the user specified --with-gtk=/foo/ then look in /foo/bin/
-  # for glib-config and gtk-config.
+  # if the user specified --with-gtk=/foo/ or --with-gnome=/foo/ then
+  # look in /foo/bin/ for glib-config, gtk-config, and gnome-config.
   #
   gtk_path="$PATH"
 
   if test ! -z "$gtk_dir"; then
     # canonicalize slashes.
-    gtk_dir=`echo "${gtk_dir}/bin" | sed 's@//*@/@g'`
-    gtk_path="$gtk_dir:$gtk_path"
+    foo=`echo "${gtk_dir}/bin" | sed 's@//*@/@g'`
+    gtk_path="$foo:$gtk_path"
   fi
 
-  if test ! -z "gnome_dir"; then
+  if test ! -z "$gnome_dir"; then
     # canonicalize slashes.
-    gnome_dir=`echo "${gnome_dir}/bin" | sed 's@//*@/@g'`
-    gtk_path="$gnome_dir:$gtk_path"
+    foo=`echo "${gnome_dir}/bin" | sed 's@//*@/@g'`
+    gtk_path="$foo:$gtk_path"
   fi
 
   AC_PATH_PROGS(glib_config,  glib12-config glib-config,,  $gtk_path)
@@ -1863,7 +1861,7 @@ if test "$with_gtk" = yes; then
     AC_PATH_PROGS(gnome_config, gnome-config,, $gtk_path)
   fi
 
-  if test -n "$glib_config" -a  -n "gtk_config" ; then
+  if test -n "$glib_config" -a  -n "$gtk_config" ; then
     have_gtk=yes
     if test "$with_gnome" = yes -a -n "$gnome_config" ; then
       have_gnome=yes
@@ -1904,7 +1902,7 @@ if test "$with_gtk" = yes; then
   # Check for Gnome Capplet support.
   #
   if test "$have_gnome" = yes -a "$have_gtk" = yes; then
-    gnome_config_libs="gtk capplet gnomeui xml"
+    gnome_config_libs="gtk capplet gnomeui gdk_pixbuf"
     AC_MSG_CHECKING(for Gnome capplet includes)
     AC_CACHE_VAL(ac_cv_gnome_config_cflags,
       [if ( $gnome_config --cflags $gnome_config_libs 2>&1 >/dev/null | \
@@ -1953,6 +1951,11 @@ if test "$with_gtk" = yes; then
     ac_gtk_config_cflags=$ac_gnome_config_cflags
     ac_gtk_config_libs=$ac_gnome_config_libs
     AC_DEFINE(HAVE_CRAPPLET)
+
+    # check for this function that was not in libcapplet 1.2.
+    AC_CHECK_X_LIB(capplet, capplet_widget_changes_are_immediate,
+                   [AC_DEFINE(HAVE_CRAPPLET_IMMEDIATE)], [true],
+                   $ac_gnome_config_libs)
   fi
 
 
@@ -1976,17 +1979,29 @@ fi
 
 ###############################################################################
 #
-#       Check for -lxml (if we have Gtk)
+#       Check for -lxml
 #
 ###############################################################################
 
 have_xml=no
 with_xml_req=unspecified
+xml_halfassed=no
 AC_ARG_WITH(xml,
 [  --with-xml              The XML toolkit is needed for some parts of
                           the Gtk interface.],
 [with_xml="$withval"; with_xml_req="$withval"],[with_xml=yes])
 
+# if --with-xml=/directory/ was specified, remember that directory so that
+# we can also look for the `xml-config' program in that directory.
+case "$with_xml" in
+  /*)
+    xml_dir="$with_xml"
+    ;;
+  *)
+    xml_dir=""
+    ;;
+esac
+
 HANDLE_X_PATH_ARG(with_xml, --with-xml, XML)
 
 if test "$with_xml" != yes -a "$with_xml" != no ; then
@@ -1994,33 +2009,62 @@ if test "$with_xml" != yes -a "$with_xml" != no ; then
   exit 1
 fi
 
-if test "$have_gtk" != yes; then
-  # don't bother if no GTK
-  with_xml=no
-fi
-
 if test "$with_xml" = yes; then
   have_xml=no
 
-  # the XML stuff is likely to be in GTK paths.
-  ac_save_X_CFLAGS="$X_CFLAGS"
-  ac_save_X_LIBS="$X_LIBS"
-  X_CFLAGS="$X_CFLAGS $ac_gtk_config_cflags"
-  X_LIBS="$X_LIBS $ac_gtk_config_libs"
+  # if the user specified --with-gtk=/foo/ or --with-gnome=/foo/ then
+  # look in /foo/bin/ for for xml-config.
+  #
+  xml_path="$PATH"
+
+  if test ! -z "$gtk_dir"; then
+    # canonicalize slashes.
+    foo=`echo "${gtk_dir}/bin" | sed 's@//*@/@g'`
+    xml_path="$foo:$xml_path"
+  fi
+
+  if test ! -z "$gnome_dir"; then
+    # canonicalize slashes.
+    foo=`echo "${gnome_dir}/bin" | sed 's@//*@/@g'`
+    xml_path="$foo:$xml_path"
+  fi
+
+  AC_PATH_PROGS(xml_config, xml2-config xml-config,, $xml_path)
+
+  # If we found the xml-config program, run it to get flags.
+  #
+  if test -n "$xml_config" ; then
+    AC_CACHE_CHECK([for XML includes], ac_cv_xml_config_cflags,
+                   [ac_cv_xml_config_cflags=`$xml_config --cflags`])
+    AC_CACHE_CHECK([for XML libs], ac_cv_xml_config_libs,
+                   [ac_cv_xml_config_libs=`$xml_config --libs`])
+    ac_xml_config_cflags=$ac_cv_xml_config_cflags
+    ac_xml_config_libs=$ac_cv_xml_config_libs
+  fi
 
+  ac_save_xml_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="$CPPFLAGS $ac_xml_config_cflags"
   AC_CHECK_X_HEADER(xmlIO.h, [have_xml=yes])
+  CPPFLAGS="$ac_save_xml_CPPFLAGS"
 
   if test "$have_xml" = yes; then
     # we have the header, now check for the library
     have_xml=no
+    xml_halfassed=yes
     AC_CHECK_X_LIB(xml, xmlParseChunk,
                    [have_xml=yes
+                    xml_halfassed=no
                     XML_LIBS="-lxml"
-                    AC_DEFINE(HAVE_XML)])
+                    AC_DEFINE(HAVE_XML)],
+                   [true],
+                   $ac_xml_config_libs)
   fi
 
-  X_CFLAGS="$ac_save_X_CFLAGS"
-  X_LIBS="$ac_save_X_LIBS"
+  if test "$have_xml" = yes; then
+    INCLUDES="$INCLUDES $ac_xml_config_cflags"
+    GTK_LIBS="$GTK_LIBS $ac_xml_config_libs"
+    AC_DEFINE(HAVE_XML)
+  fi
 
 fi
 
@@ -2442,6 +2486,153 @@ if test "$have_motif" = yes -a "$have_xpm" = yes ; then
 fi
 
 
+###############################################################################
+#
+#       Check for -lgdk_pixbuf.
+#
+###############################################################################
+
+have_gdk_pixbuf=no
+with_gdk_pixbuf_req=unspecified
+AC_ARG_WITH(pixbuf,
+[  --with-pixbuf           Include support for the GDK-Pixbuf library in some
+                          demos, which will make it possible for them to read
+                          GIF, JPEG, and PNG files as well.],
+  [with_gdk_pixbuf="$withval"; with_gdk_pixbuf_req="$withval"],
+  [with_gdk_pixbuf=yes])
+
+# if --with-pixbuf=/directory/ was specified, remember that directory so that
+# we can also look for the `gdk-pixbuf-config' program in that directory.
+case "$with_gdk_pixbuf" in
+  /*)
+    gdk_pixbuf_dir="$with_gdk_pixbuf"
+    ;;
+  *)
+    gdk_pixbuf_dir=""
+    ;;
+esac
+
+HANDLE_X_PATH_ARG(with_gdk_pixbuf, --with-pixbuf, GDK_PIXBUF)
+
+if test "$with_gdk_pixbuf" != yes -a "$with_gdk_pixbuf" != no ; then
+  echo "error: must be yes or no: --with-pixbuf=$with_gdk_pixbuf"
+  exit 1
+fi
+
+if test "$with_gdk_pixbuf" = yes; then
+  have_gdk_pixbuf=no
+
+  # if the user specified --with-gtk=/foo/ or --with-gnome=/foo/ then
+  # look in /foo/bin/ for for gdk-pixbuf-config.
+  #
+  gdk_pixbuf_path="$PATH"
+
+  if test ! -z "$gtk_dir"; then
+    # canonicalize slashes.
+    foo=`echo "${gtk_dir}/bin" | sed 's@//*@/@g'`
+    gdk_pixbuf_path="$foo:$gdk_pixbuf_path"
+  fi
+
+  if test ! -z "$gnome_dir"; then
+    # canonicalize slashes.
+    foo=`echo "${gnome_dir}/bin" | sed 's@//*@/@g'`
+    gdk_pixbuf_path="$foo:$gdk_pixbuf_path"
+  fi
+
+  AC_PATH_PROGS(gdk_pixbuf_config, gdk-pixbuf-config,, $gdk_pixbuf_path)
+
+  # If we found the gdk-pixbuf-config program, run it to get flags.
+  #
+  if test -n "$gdk_pixbuf_config" ; then
+    AC_CACHE_CHECK([for gdk-pixbuf includes], ac_cv_gdk_pixbuf_config_cflags,
+               [ac_cv_gdk_pixbuf_config_cflags=`$gdk_pixbuf_config --cflags`])
+    AC_CACHE_CHECK([for gdk-pixbuf libs], ac_cv_gdk_pixbuf_config_libs,
+               [ac_cv_gdk_pixbuf_config_libs=`$gdk_pixbuf_config --libs`])
+    ac_gdk_pixbuf_config_cflags=$ac_cv_gdk_pixbuf_config_cflags
+    ac_gdk_pixbuf_config_libs=$ac_cv_gdk_pixbuf_config_libs
+  fi
+
+  ac_save_gdk_pixbuf_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="$CPPFLAGS $ac_gdk_pixbuf_config_cflags"
+
+  # check for header 1...
+  AC_CHECK_X_HEADER(gdk-pixbuf/gdk-pixbuf.h, [have_gdk_pixbuf=yes])
+
+  # if that worked, check for header 2...
+  if test "$have_gdk_pixbuf" = yes; then
+    have_gdk_pixbuf=no
+    AC_CHECK_X_HEADER(gdk-pixbuf/gdk-pixbuf-xlib.h, [have_gdk_pixbuf=yes])
+  fi
+
+  CPPFLAGS="$ac_save_gdk_pixbuf_CPPFLAGS"
+
+  if test "$have_gdk_pixbuf" = yes; then
+    # we have the headers, now check for the libraries
+    have_gdk_pixbuf=no
+    gdk_pixbuf_halfassed=yes
+    # library 1...
+    AC_CHECK_X_LIB(gdk_pixbuf, gdk_pixbuf_new_from_file,
+                   [have_gdk_pixbuf=yes], [true],
+                   $ac_gdk_pixbuf_config_libs)
+    # library 2...
+    if test "$have_gdk_pixbuf" = yes; then
+      AC_CHECK_X_LIB(gdk_pixbuf_xlib, gdk_pixbuf_xlib_init,
+                     [have_gdk_pixbuf=yes
+                      gdk_pixbuf_halfassed=no],
+                     [true],
+                     $ac_gdk_pixbuf_config_libs)
+    fi
+  fi
+
+  if test "$have_gdk_pixbuf" = yes; then
+    INCLUDES="$INCLUDES $ac_gdk_pixbuf_config_cflags"
+    XPM_LIBS="$ac_gdk_pixbuf_config_libs -lgdk_pixbuf -lgdk_pixbuf_xlib"
+    AC_DEFINE(HAVE_GDK_PIXBUF)
+  fi
+fi
+
+
+###############################################################################
+#
+#       Check for -ljpeg
+#
+###############################################################################
+
+have_jpeg=no
+with_jpeg_req=unspecified
+jpeg_halfassed=no
+AC_ARG_WITH(jpeg,
+[  --with-jpeg             Include support for the JPEG library in some demos,
+                          which will make it possible for them to read JPEG
+                          files as well.],
+  [with_jpeg="$withval"; with_jpeg_req="$withval"],
+  [with_jpeg=yes])
+
+HANDLE_X_PATH_ARG(with_jpeg, --with-jpeg, JPEG)
+
+if test "$with_jpeg" != yes -a "$with_jpeg" != no ; then
+  echo "error: must be yes or no: --with-jpeg=$with_jpeg"
+  exit 1
+fi
+
+if test "$with_jpeg" = yes; then
+
+  have_jpeg=no
+  AC_CHECK_X_HEADER(jpeglib.h, [have_jpeg=yes])
+
+  if test "$have_jpeg" = yes; then
+    # we have the header, now check for the library
+    have_jpeg=no
+    jpeg_halfassed=yes
+    AC_CHECK_X_LIB(jpeg, jpeg_start_compress,
+                   [have_jpeg=yes
+                    jpeg_halfassed=no
+                    JPEG_LIBS="-ljpeg"
+                    AC_DEFINE(HAVE_JPEGLIB)])
+  fi
+fi
+
+
 ###############################################################################
 #
 #       Check for the XSHM server extension.
@@ -2451,7 +2642,7 @@ fi
 have_xshm=no
 with_xshm_req=unspecified
 AC_ARG_WITH(xshm-ext,
-[  --with-xshm-ext         Include support for the XSHM extension.],
+[  --with-xshm-ext         Include support for the Shared Memory extension.],
   [with_xshm="$withval"; with_xshm_req="$withval"],[with_xshm=yes])
 
 HANDLE_X_PATH_ARG(with_xshm, --with-xshm-ext, XSHM)
@@ -2761,6 +2952,10 @@ else
   GLE_KLUDGE="-${tab}   "
 fi
 
+if test "$have_jpeg" = yes -a "$have_gdk_pixbuf" = yes; then
+ JPEG_EXES='$(JPEG_EXES)'
+fi
+
 
 # Another substitution in the XScreenSaver.ad.in file:
 #
@@ -2775,6 +2970,7 @@ fi
 
 # Now that we know whether we have Gnome, we can decide where the XML
 # config files get installed.
+#
 if test -z "$HACK_CONF_DIR" ; then
   if test -n "$GNOME_DATADIR" ; then
     HACK_CONF_DIR='${GNOME_DATADIR}/control-center/screensavers'
@@ -2784,6 +2980,25 @@ if test -z "$HACK_CONF_DIR" ; then
 fi
 
 
+
+# After computing $HACK_CONF_DIR, make sure $GTK_ICONDIR has a value
+# so that we know where to install the Gtk pixmaps.
+#
+if test -n "$GNOME_DATADIR" ; then
+  GTK_ICONDIR='$(GNOME_DATADIR)/pixmaps'
+elif test "$have_gtk" = yes; then
+  # should this be "$(prefix)/share/pixmaps"? But /usr/X11R6/share/ is wrong...
+  GTK_ICONDIR='/usr/share/pixmaps'
+else
+  GTK_ICONDIR=''
+fi
+
+
+# canonicalize slashes.
+HACK_CONF_DIR=`echo "${HACK_CONF_DIR}" | sed 's@/$@@;s@//*@/@g'`
+
+
+
 ###############################################################################
 #
 #       Perform substitutions and write Makefiles.
@@ -2798,6 +3013,7 @@ AC_SUBST(SAVER_LIBS)
 AC_SUBST(MOTIF_LIBS)
 AC_SUBST(GTK_LIBS)
 AC_SUBST(XML_LIBS)
+AC_SUBST(JPEG_LIBS)
 AC_SUBST(HACK_LIBS)
 AC_SUBST(XPM_LIBS)
 AC_SUBST(GL_LIBS)
@@ -2820,6 +3036,7 @@ AC_SUBST(SAVER_GL_OBJS)
 AC_SUBST(SAVER_GL_LIBS)
 AC_SUBST(LOCK_SRCS)
 AC_SUBST(LOCK_OBJS)
+AC_SUBST(JPEG_EXES)
 AC_SUBST(GL_EXES)
 AC_SUBST(GL_UTIL_EXES)
 AC_SUBST(GL_MEN)
@@ -2831,6 +3048,7 @@ AC_SUBST(GNOMEHELP_Y)
 AC_SUBST(GNOMEHELP_N)
 AC_SUBST(HACKDIR)
 AC_SUBST(GNOME_DATADIR)
+AC_SUBST(GTK_ICONDIR)
 AC_SUBST(HACK_CONF_DIR)
 
 APPDEFAULTS=$ac_x_app_defaults
@@ -2980,17 +3198,33 @@ if test "$with_gnome_req" = yes -a "$have_gnome" = no ; then
   warn2 'headers and/or libraries were not found.'
 fi
 
-if test "$with_xml_req" = yes -a "$have_xml" = no ; then
-  warn  'Use of the XML library was requested, but the necessary'
-  warn2 'headers and/or libraries were not found.'
-elif test "$have_gtk" = yes -a "$have_xml" = no ; then
-  warn  'GTK is being used, but the XML library was not found.'
-  warn2 'Some functionality will be disabled.'
+if test "$have_gtk" = yes ; then
+  if test "$have_xml" = no ; then
+    if test "$with_xml_req" = yes ; then
+      warn  'Use of the XML library was requested, but the necessary'
+      warn2 'headers and/or libraries were not found.'
+    else
+      warn  'GTK is being used, but the XML library was not found.'
+    fi
+
+    if test "$xml_halfassed" = yes ; then
+      echo ''
+      warn2 'More specifically, we found the headers, but not the'
+      warn2 'libraries; so either XML is half-installed on this'
+      warn2 "system, or something else went wrong.  The \`config.log'"
+      warn2 'file might contain some clues.'
+    fi
+
+    echo ''
+    warn2 "Without XML, the per-display-mode \`Settings' dialogs"
+    warn2 'will not be available.  Specify the location of the XML'
+    warn2 'library through the --with-xml option to configure.'
+  fi
 fi
 
 if test "$have_motif" = yes -a "$have_lesstif" = yes ; then
 
-  preferred_lesstif=0.86
+  preferred_lesstif=0.92
 
   if test "$lesstif_version" = unknown; then
     warnL "Unable to determine the LessTif version number!"
@@ -3007,22 +3241,85 @@ if test "$have_motif" = yes -a "$have_lesstif" = yes ; then
 fi
 
 
+if test "$have_motif" = yes -a "$have_gtk" = no ; then
+  warn  'Motif is being used, and GTK is not.'
+  echo  ''
+  warn2 'Though the Motif front-end to xscreensaver is still'
+  warn2 'maintained, it is no longer being updated with new'
+  warn2 'features: all new development on the xscreensaver-demo'
+  warn2 'program is happening in the GTK version, and not in the'
+  warn2 'Motif version.  It is recommended that you build against'
+  warn2 'GTK instead of Motif.  See <http://www.gtk.org/>.'
+fi
+
+
+if test "$with_xpm_req" = yes -a "$have_xpm" = no; then
+  warnL 'Use of XPM was requested, but it was not found.'
+fi
+
+if test "$with_gdk_pixbuf_req" = yes  -a "$have_gdk_pixbuf" = no; then
+  warnL 'Use of GDK-Pixbuf was requested, but it was not found.'
+fi
+
+if test "$have_xpm" = no -a "$have_gdk_pixbuf" = no; then
 
-if test "$have_xpm" = no ; then
   if test "$with_xpm_req" = yes ; then
-    warnL 'Use of XPM was requested, but it was not found.'
+    true
   elif test "$with_xpm_req" = no ; then
-    noteL 'The XPM library is not being used.'
+    warnL 'The XPM library is not being used.'
   else
-    noteL 'The XPM library was not found.'
+    warnL 'The XPM library was not found.'
+  fi
+
+  if test "$with_gdk_pixbuf_req" = yes ; then
+    true
+  elif test "$with_gdk_pixbuf_req" = no ; then
+    warnL 'The GDK-Pixbuf library is not being used.'
+  else
+    warnL 'The GDK-Pixbuf library was not found.'
+  fi
+
+  if test "$gdk_pixbuf_halfassed" = yes ; then
+    echo ''
+    warn2 'More specifically, we found the headers, but not the'
+    warn2 'libraries; so either GDK-Pixbuf is half-installed on this'
+    warn2 "system, or something else went wrong.  The \`config.log'"
+    warn2 'file might contain some clues.'
   fi
 
   echo ''
   warn2 'Some of the demos will not be as colorful as they'
-  warn2 'could be.  You might want to consider installing XPM'
-  warn2 'and re-running configure.  (Remember to delete the'
-  warn2 'config.cache file first.)  You can find XPM at most'
-  warn2 'X11 archive sites, such as <http://sunsite.unc.edu/>.'
+  warn2 'could be.  You should consider installing Pixbuf or'
+  warn2 'XPM and re-running configure.  (Remember to delete'
+  warn2 'the config.cache file first.)  The Pixbuf library is'
+  warn2 'a part of GNOME.  The XPM library comes with most'
+  warn2 'X11 installations; you can also find it at the X11'
+  warn2 'archive sites, such as <http://sunsite.unc.edu/>.'
+  echo  ''
+  warn2 'GDK-Pixbuf is recommended over XPM, as it provides'
+  warn2 'support for more image formats.'
+fi
+
+
+if test "$have_jpeg" = no ; then
+  if test "$with_jpeg_req" = yes ; then
+    warnL 'Use of libjpeg was requested, but it was not found.'
+  elif test "$with_jpeg_req" = no ; then
+    noteL 'The JPEG library is not being used.'
+  else
+    noteL 'The JPEG library was not found.'
+  fi
+
+  if test "$jpeg_halfassed" = yes ; then
+    echo ''
+    warn2 'More specifically, we found the headers, but not the'
+    warn2 'library; so either JPEG is half-installed on this'
+    warn2 "system, or something else went wrong.  The \`config.log'"
+    warn2 'file might contain some clues.'
+    echo ''
+  fi
+
+  warn2 "This means the \`webcollage' program will be much slower."
 fi
 
 
@@ -3197,10 +3494,10 @@ if test \! -z "$rpmv" ; then
   echo ""
 
   if test "$rpmbdir" = "$rpmhdir" ; then
-    warn2 "The RPM version was installed in $rpmbdir."
+    warn2 "The RPM version was installed in $rpmbdir/."
   else
-    warn2 "The RPM version was installed in $rpmbdir,"
-    warn2 "with demos in $rpmhdir."
+    warn2 "The RPM version was installed in $rpmbdir/,"
+    warn2 "with demos in $rpmhdir/."
   fi
 
   do_dir_warning=yes
@@ -3217,15 +3514,14 @@ if test "$do_dir_warning" = yes; then
   echo ""
   echo '      When you run "make install", the "xscreensaver",'
   echo '      "xscreensaver-demo", and "xscreensaver-command" executables'
-  echo "      will be installed in ${bindir}."
+  echo "      will be installed in ${bindir}/."
   echo ""
-  echo "      The various graphics demos (120+ different executables) will"
-  echo "      also be installed in ${HACKDIR}."
+  echo "      The various graphics demos (140+ different executables) will"
+  echo "      be installed in ${HACKDIR}/."
   echo ""
-  echo "      If you would prefer the demos to be installed elsewhere"
-  echo "      (for example, in a dedicated directory) you should re-run"
-  echo "      configure with the --with-hackdir=DIR option.  For more"
-  echo "      information, run $0 --help."
+  echo "      If you would prefer the demos to be installed elsewhere,"
+  echo "      you should re-run configure with the --with-hackdir=DIR"
+  echo "      option.  For more information, run \`./configure --help'."
   warning=yes
 fi