I suggest that we check in this patch into the stable branch. J'
On Sun, Feb 01, 2009 at 02:03:30PM -0800, Ben Pfaff wrote:
It is a bug in the configure script. The plotutils manual
mentions that -lpng -lz might be necessary, but we don't check
for it.
Do you want to file a bug report? It would be helpful.
The plotutils description of how to link against it is awfully
complicated:
To link your application with GNU `libplot', you would use the
appropriate `-l' option(s) on the command line when compiling it. You
would use
-lplot -lXaw -lXmu -lXt -lXext -lX11 -lpng -lz -lm
or, in recent releases of the X Window System,
-lplot -lXaw -lXmu -lXt -lSM -lICE -lXext -lX11 -lpng -lz -lm
These linking options assume that your version of `libplot' has been
compiled with PNG support; if not, you would omit the `-lpng -lz'
options.
As an alternative to the preceding, you may need to use `-lplot -lXm
-lXt -lXext -lX11 -lpng -lz -lm', `-lplot -lXm -lXt -lXext -lX11 -lpng
-lz -lm -lc -lgen', or `-lplot -lXm -lXt -lXext -lX11 -lpng -lz -lm -lc
-lPW', on systems that provide Motif widgets instead of Athena widgets.
In recent releases of the X Window System, you would insert `-lSM
-lICE'. Recent releases of Motif require `-lXp' and possibly `-lXpm'
as well.)
On some platforms, the directories in which `libplot' or the other
libraries are stored must be specified on the command line.
For example, the options `-lXaw -lXmu -lXt -lSM -lICE -lXext -lX11',
which specify X Window System libraries, may need to be preceded by an
option like `-L/usr/X11/lib'.
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diff --git a/acinclude.m4 b/acinclude.m4
index 75fcb0d..731fb07 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -51,7 +51,7 @@ AC_DEFUN([PSPP_LIBPLOT],
# 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"
+ extra_libs="-lpng -lz -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"],,
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