Gnuplot build fails on sage-1.4.1.2

[RalphieBoy]

Missing header file:

gnuplot-4.0.0: blew chunks here:
if gcc -DHAVE_CONFIG_H -I. -I. -I.. -I../term -I../term
-DBINDIR="/SandBox/Justin/sb/sage-1.4/local/bin"
-DX11_DRIVER_DIR="/SandBox/Justin/sb/sage-1.4/local/libexec/gnuplot/4.0"
-DCONTACT="gnuplot-bugs@lists.sourceforge.net"
-DHELPFILE="/SandBox/Justin/sb/sage-1.4/local/share/gnuplot/4.0/gnuplot.gih"
-I/SandBox/Justin/sb/sage-1.4/local/include -g -O2 -ObjC -MT gplt_x11.o -MD -MP
-MF ".deps/gplt_x11.Tpo"
-c -o gplt_x11.o test -f 'gplt_x11.c' || echo './'gplt_x11.c;
then mv ".deps/gplt_x11.Tpo" ".deps/gplt_x11.Po";
else rm -f ".deps/gplt_x11.Tpo"; exit 1;
fi
gplt_x11.c:519: error: 'Class' redeclared as different kind of symbol
:0: error: previous declaration of 'Class' was here
make[3]: *** [gplt_x11.o] Error 1
make[2]: *** [all-recursive] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2
Error building gnuplot

Component: packages: standard

Issue created by migration from https://trac.sagemath.org/ticket/143

[RalphieBoy]

Attachment: Gnuplot.errlog.gz

Build log for gnuplot

[RalphieBoy]

comment:1

The problem is that, on Mac OS X, gnuplot builds with the flag "-ObjC" (enable Objective C support). This has to do with support for something called AquaTerm, which it (gnuplot) can use as a display vehicle.

The flag should only be used for the code that actually uses Objective C, but instead it is used for all code; 'Class' is a reserved word for Objective C, and a variable name in the gnuplot code. Hence...

We need an 'autoconfig' guy!

[williamstein]

comment:2

Since gnuplot is not integrated in any way with SAGE, and won't be a longterm part of SAGE, people should get it some other way (e.g., fink or Darwinports, etc.). Therefore I've removed SAGE's optional gnuplot package.