undefined reference to octave_java::register_type when configured with --disable-java, patch suggested

[Andreas Weber]

Dear maintainers,

I get a "undefined reference to octave_java::register_type ()" when 
configured with "--disable-java" in dev fafd51a1b0f0+

I guess the reason for this is that
ov.cc:2758 octave_java::register_type ();
is not conditional with "if defined HAVE_JAVA"
but
./libinterp/octave-value/ov-java.cc:1840:DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA 
(octave_java, "octave_java", "octave_java");
is.

Another problem was
In file included from ../../octave-src/libinterp/octave-value/ov.cc:79:0:
../../octave-src/libinterp/octave-value/ov-java.h:26:17: fatal error: 
jni.h: No such file or directory

I changed ov.cc
#if defined HAVE_JAVA
#include "ov-java.h"
#endif

after that I was able to compile until
./java.texi:238: Crossverweis auf nicht existierenden Knoten 
„doc-javamem“ (vielleicht @section statt @subsection o.ä.?).
makeinfo: Entferne Ausgabedatei 
„../../../octave-src/doc/interpreter/octave.info“ wegen Fehler; --force 
benutzen, um diese beizubehalten.

which I didn't tracked further yet. I ran "make -i check" and got 3 
unexpected fails. I think none of them are caused by my 2 changes.

Summary:

PASS 10673
FAIL 3
XFAIL 3

>>>>> processing /home/andy/octave-src/libinterp/interpfcn/file-io.cc
assert (sscanf ("1,2", "%f", "fr_FR"), 1.2)
!!!!! test failed

>>>>> processing /home/andy/octave-src/scripts/plot/copyobj.m
***** testif HAVE_MAGICK
h1 = figure ();
set (h1, "visible", "off");
x = 0:0.1:2*pi;
y1 = sin (x);
y2 = exp (x - 1);
ax = plotyy (x,y1, x-1,y2, @plot, @semilogy);
xlabel ("X");
ylabel (ax(1), "Axis 1");
ylabel (ax(2), "Axis 2");
axes (ax(1));
text (0.5, 0.5, "Left Axis", ...
"color", [0 0 1], "horizontalalignment", "center");
axes (ax(2));
text (4.5, 80, "Right Axis", ...
"color", [0 0.5 0], "horizontalalignment", "center");
s1 = hdl2struct (h1);
h2 = struct2hdl (s1);
s2 = hdl2struct (h2);
png1 = strcat (tmpnam (), ".png");
png2 = strcat (tmpnam (), ".png");
unwind_protect
print (h1, png1);
[img1, map1, alpha1] = imread (png1);
print (h2, png2);
[img2, map2, alpha2] = imread (png2);
unwind_protect_cleanup
unlink (png1);
unlink (png2);
end_unwind_protect
assert (img1, img2);
assert (map1, map2);
assert (alpha1, alpha2);
!!!!! test failed

>>>>> processing /home/andy/octave-src/scripts/sparse/svds.m
***** testif HAVE_ARPACK
s = svds (speye (10));
assert (s, ones (6, 1), 4*eps);
!!!!! test failed


Best regards, Andy

--
Mit freundlichen Grüßen

Dipl.-Ing.(FH) Andreas Weber
Akademischer Mitarbeiter
Fakultät Elektrotechnik und Informationstechnik

Hochschule Offenburg - University of Applied Sciences Offenburg
Badstraße 24
77652 Offenburg
Telefon +49 781 205-386

ov_cc_java_fix.patch
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