configure script linker option for FreeBSD

[Ryan Hinton]

When installing Octave from FreeBSD ports (6.3-STABLE), I had to modify 
the configure script (actually configure.in) to fix a bunch of linker 
warnings in liboctinterp.so. Specifically, I had to ask for linking 
(SH_LD) to be done with the C++ compiler instead of the C compiler. The 
FreeBSD port maintainer added my patch to the port, and I'm running fine 
now.

I noticed, though, that the change is in a FreeBSD-specific area of the 
configure script, I wanted to raise the issue here to potentially fix 
the problem at its source. On the other hand, I someone added this 
FreeBSD-specific code to fix a problem in the past. I don't have the CVS 
repository since I'm working from a port, so I'm not sure when or why or 
if it is still necessary for some people.

Here is the patch I used that fixes my problem.

--- configure.in~ 2008-02-12 17:58:15.000000000 +0000
+++ configure.in 2008-02-12 17:56:53.000000000 +0000
@@ -974,7 +974,7 @@
SH_LDFLAGS='-shared -fPIC'
;;
*-*-freebsd*)
- SH_LD='$(CC)'
+ SH_LD='$(CXX)'
SH_LDFLAGS="-shared -Wl,-x"
RLD_FLAG='-Wl,-rpath -Wl,$(octlibdir)'
;;


I believe it's against octave-3.0.0_1. Here are snips from the startup 
message for more specific identification.

GNU Octave, version 3.0.0
Octave was configured for "i386-portbld-freebsd6.3".

I hope I remembered everything. I'm happy to clarify if I can.

---
Ryan Hinton
rwh4s at virginia.edu