+ AC_CHECK_LIB(Xp, XpCreateContext)
+ fi
+fi
+
+### Is -lXaw3d available?
+HAVE_XAW3D=no
+if test "${HAVE_X11}" = "yes"; then
+ if test "${USE_X_TOOLKIT}" != "none"; then
+ old_c_flags="${CFLAGS}"
+ CFLAGS="${LD_SWITCH_X_SITE}"
+ AC_CHECK_HEADER(X11/Xaw3d/Scrollbar.h,
+ AC_CHECK_LIB(Xaw3d, XawScrollbarSetThumb, HAVE_XAW3D=yes, , -lX11))
+ CFLAGS="${old_c_flags}"
+
+ if test "${HAVE_XAW3D}" = "yes"; then
+ AC_DEFINE(HAVE_XAW3D)
+ fi
+ fi
+fi
+
+dnl Use toolkit scroll bars if configured for X toolkit and either
+dnl using Motif or Xaw3d is available, and unless
+dnl --with-toolkit-scroll-bars=no was specified.
+
+USE_TOOLKIT_SCROLL_BARS=no
+if test "${with_toolkit_scroll_bars}" != "no"; then
+ if test "${USE_X_TOOLKIT}" != "none"; then
+ if test "${USE_X_TOOLKIT}" = "MOTIF"; then
+ AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
+ HAVE_XAW3D=no
+ USE_TOOLKIT_SCROLL_BARS=yes
+ elif test "${HAVE_XAW3D}" = "yes"; then
+ AC_DEFINE(USE_TOOLKIT_SCROLL_BARS)
+ USE_TOOLKIT_SCROLL_BARS=yes
+ fi
+ fi
+fi
+
+### Use -lXpm if available, unless `--with-xpm=no'.
+HAVE_XPM=no
+if test "${HAVE_X11}" = "yes"; then
+ if test "${with_xpm}" != "no"; then
+ old_c_flags="${CFLAGS}"
+ CFLAGS="${LD_SWITCH_X_SITE}"
+ AC_CHECK_HEADER(X11/xpm.h,
+ AC_CHECK_LIB(Xpm, XpmReadFileToPixmap, HAVE_XPM=yes, , -lX11))
+ CFLAGS="${old_c_flags}"
+ fi
+
+ if test "${HAVE_XPM}" = "yes"; then
+ AC_DEFINE(HAVE_XPM)
+ fi
+fi
+
+### Use -ljpeg if available, unless `--with-jpeg=no'.
+HAVE_JPEG=no
+if test "${HAVE_X11}" = "yes"; then
+ if test "${with_jpeg}" != "no"; then
+ old_c_flags="${CFLAGS}"
+ CFLAGS="${LD_SWITCH_X_SITE} ${CFLAGS}"
+ AC_CHECK_LIB(jpeg, jpeg_destroy_compress, HAVE_JPEG=yes, , -lX11)
+ CFLAGS="${old_c_flags}"
+ fi
+
+ if test "${HAVE_JPEG}" = "yes"; then
+ AC_DEFINE(HAVE_JPEG)
+ fi
+fi
+
+### Use -lpng if available, unless `--with-png=no'.
+HAVE_PNG=no
+if test "${HAVE_X11}" = "yes"; then
+ if test "${with_png}" != "no"; then
+ old_c_flags="${CFLAGS}"
+ CFLAGS="${LD_SWITCH_X_SITE} ${CFLAGS}"
+ AC_CHECK_HEADER(png.h,
+ AC_CHECK_LIB(png, png_set_expand, HAVE_PNG=yes, , -lX11 -lz -lm))
+ CFLAGS="${old_c_flags}"
+ fi
+
+ if test "${HAVE_PNG}" = "yes"; then
+ AC_DEFINE(HAVE_PNG)
+ fi
+fi
+
+### Use -ltiff if available, unless `--with-tiff=no'.
+HAVE_TIFF=no
+if test "${HAVE_X11}" = "yes"; then
+ if test "${with_tiff}" != "no"; then
+ old_c_flags="${CFLAGS}"
+ CFLAGS="${LD_SWITCH_X_SITE} ${CFLAGS}"
+ AC_CHECK_HEADER(tiffio.h,
+ AC_CHECK_LIB(tiff, TIFFGetVersion, HAVE_TIFF=yes, , -lX11 -lm))
+ CFLAGS="${old_c_flags}"
+ fi
+
+ if test "${HAVE_TIFF}" = "yes"; then
+ AC_DEFINE(HAVE_TIFF)
+ fi
+fi
+
+### Use -lgif if available, unless `--with-gif=no'.
+HAVE_GIF=no
+if test "${HAVE_X11}" = "yes"; then
+ if test "${with_gif}" != "no"; then
+ old_c_flags="${CFLAGS}"
+ CFLAGS="${LD_SWITCH_X_SITE} ${CFLAGS}"
+ AC_CHECK_HEADER(gif_lib.h,
+ AC_CHECK_LIB(ungif, DGifOpenFileName, HAVE_GIF=yes, , -lX11))
+ CFLAGS="${old_c_flags}"
+ fi
+
+ if test "${HAVE_GIF}" = "yes"; then
+ AC_DEFINE(HAVE_GIF)