X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=acinclude.m4;fp=acinclude.m4;h=4201e22b58c67012d73ece9280e538e35a8b79bb;hb=587a0e3e681e25fdf8fd635f7944f5707f9b1868;hp=5f358087509badc11851f87b11d204e2853631cc;hpb=5060bf698ceb6a0eedcc963a1c5fee220b7be478;p=pspp-builds.git

diff --git a/acinclude.m4 b/acinclude.m4
index 5f358087..4201e22b 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -40,8 +40,28 @@ AC_DEFUN([PSPP_LIBPLOT],
   AC_ARG_WITH(libplot, [  --without-libplot         don't compile in support of charts (using libplot)])
 
   if test x"$with_libplot" != x"no" ; then 
-    AC_CHECK_LIB(plot, pl_newpl_r,,
-	         [PSPP_REQUIRED_PREREQ([libplot (or use --without-libplot)])])
+    # Check whether we can link against libplot without any extra libraries.
+    AC_CHECK_LIB(plot, pl_newpl_r, [LIBPLOT_LIBS="-lplot"])
+
+    # Check whether we can link against libplot if we also link X.
+    if test x"$LIBPLOT_LIBS" = x""; then
+      AC_PATH_XTRA
+      extra_libs="-lXaw -lXmu -lXt $X_PRE_LIBS -lXext -lX11 $X_EXTRA_LIBS -lm"
+      AC_CHECK_LIB(plot, pl_newpl_r,
+      		   [LIBPLOT_LIBS="-lplot $extra_libs"
+                    LDFLAGS="$LDFLAGS $X_LIBS"],,
+      		   [$extra_libs])
+    fi
+
+    # Still can't link?
+    if test x"$LIBPLOT_LIBS" = x""; then
+      PSPP_REQUIRED_PREREQ([libplot (or use --without-libplot)])
+    fi
+
+    # Set up to make everything work.
+    LIBS="$LIBPLOT_LIBS $LIBS"
+    AC_DEFINE(HAVE_LIBPLOT, 1,
+              [Define to 1 if you have the `libplot' library (-lplot).])
   fi
 ])