Re: Compile problem on Mac OS X 10.4/gcc 4.0

[Hans-Bernhard B. <br...@ph...>]

Per Persson wrote:
> I've had a report that gnuplot won't compile on OS X 10.4 and gcc 4.0 
> because of a conflict with a static char array "Class" in gplt_x11.c and 
> the Objective-C type "Class". It has not been a problem before so it 
> seems gcc 4 is pickier about this than gcc 3.x.

Or maybe it's plain wrong about it.  Stranger bugs have crept into 
little-used corners of GCC before.

> When detecting Mac OS X and libaquaterm "-ObjC" is added to CFLAGS 
> (apple.m4), and every file is compiled as ObjC although only 
> aquaterm.trm needs the "-ObjC" flag.
> As I see it, there are two ways to fix this:
> 1) Change the name "Class" in gplt_x11.c
> 2) Increase granularity in buildsystem to only compile aquaterm.trm (or 
> term.c) with "-ObjC"

I'm not convinced that (2) can work.  -ObjC effectively switches to a 
different language, with possibly different calling conventions and name 
mangling rules.  I wouldn't be surprised in any way if this broke the
link completely.