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Search of pgnuplot is obsolated for mingw, cygwin abd msvc


From: Tatsuro MATSUOKA
Subject: Search of pgnuplot is obsolated for mingw, cygwin abd msvc
Date: Thu, 8 Oct 2009 20:08:08 +0900 (JST)

Hello

Name of console mode gnuplot for windows was determined to be 'gnuplot.exe' not 
'pgnuplot.exe' by
gnuplot team.
In addition, the original pgnuplot is no longer to be used from octave.

I think that search for pgnuplot is obsolete and harmful. 

So I propose that search of pgnuplot is eliminated from configure process.

The below patch is for the latest 3.2.x source trees.
Perhaps this should also be applied to the development branch sources.
 

--- a/aclocal.m4 2009-08-06 16:46:40.062500000 +0900
+++ b/aclocal.m4  2009-10-08 19:57:42.703125000 +0900
@@ -476,16 +476,8 @@
 dnl Does gnuplot exist?
 dnl
 AC_DEFUN(OCTAVE_PROG_GNUPLOT, [
-case "$canonical_host_type" in
-  *-*-cygwin* | *-*-mingw32* | *-*-msdosmsvc)
-    gp_names="pgnuplot pipe-gnuplot gnuplot"
-    gp_default=pgnuplot
-  ;;
-  *)
-    gp_names=gnuplot
-    gp_default=gnuplot
-  ;;
-esac
+  gp_names=gnuplot
+  gp_default=gnuplot
 if test "$cross_compiling" = yes; then
   GNUPLOT="$gp_default"
   AC_MSG_RESULT(assuming $GNUPLOT exists on $canonical_host_type host)

**********

Regards

Tatsuro

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