[bananas] Linux woes

[Ralph Gaume]

| I was the person that attempted to install on a redhat 7 machine, I
| eventually got it installed and somewhat working right.  It runs, but we
| are having a problem viewing images... ZSSSLOCK or something like that..
| Ran into another linux problem today..


Hi Mory & Bananas lovers-

  I too had trouble installing AIPS on Red Hat 7 and reported these problems
in mid October. The problem was immediately obvious from running the DDT. I
found that the old (well tested) egcs compilers were available on my RedHat
7 system, so I compiled most of AIPS using the egcs compilers. The TV stuff
didn't compile/link with the egcs compilers due to unresolved references, so
I compiled the XAS with the default compilers. Things have been working well
on several RH7 computers for the last 4 months or so, but your mileage may
vary.... Part of my original e-mail from Oct 13 is included below.

    -Ralph Gaume

=========================================
1) There is a problem with AIPS and Red Hat 7.0. See output
from the small DDT below, where there is a problem with UVMAP and
MXCLN:

SMALL DDT (UCHII)
AIPS 1: 'UVMAP '          1.6368      5.3179
AIPS 1: 'UVBEAM'          1.7497      5.4886
AIPS 1: 'APCLN '         14.0233     20.6413
AIPS 1: 'APRES '         17.8127     23.9398
AIPS 1: 'MXMAP '         12.9288     18.0772
AIPS 1: 'MXBEAM'         14.2349     18.5995
AIPS 1: 'MXCLN '          3.8978      7.9089
AIPS 1: 'VTESS '         19.0068     26.2858
AIPS 1: 'UVMAP '         -0.032      -0.0062     -0.4176
AIPS 1: 'UVBEAM'          0           0          -0.0061
AIPS 1: 'APCLN '          0           0           0.0007
AIPS 1: 'APRES '          0.0485     -0.0326     -0.2043
AIPS 1: 'MXMAP '          0           0           0
AIPS 1: 'MXBEAM'          0           0           0
AIPS 1: 'MXCLN '          0.0067     -0.0096      0.3552
AIPS 1: 'VTESS '          0           0           0

Turns out that this is a compiler problem. The default compilers
that come with RH 7.0, /usr/bin/gcc, /usr/bin/g77, are DEVELOPMENT
versions, see http://gcc.gnu.org/gcc-2.96.html. Fortunately, the
egcs-2.91.66, (egcs-1.1.2 release) compilers are still available in
/usr/bin/i386-redhat-linux-gcc and /usr/bin/i386-glibc21-linux-g77
When I recompiled AIPS with these compilers, the DDT worked find.
Unfortunately, things that use X, like XAS, pgplot, difmap, get
unresolved references with the old compilers, so for these I
switched back to the default compilers. Having to use a mix of old
and new compilers is a pain, but (so far) seems to work.