Steve,

Many thanks for your rapid response -- which led to important progress:

I wrote:

> >   ....
> > I am sure that worked earlier this year on this machine, but I now have a
> > later version of fedora 31 running, and the installation doesn't work, as
> > described below.
>
> <snip>
>
> >   <<<<<<< Access Violation: PC = 0000000000542A94, Addr = 00000000007AD000,
> >           Code = 2 >>>>>>>
> >
> >   pop_architecture = x86_64
> >   calling pop11_compile
> >
> >   ;;; MISHAP - serr: MEMORY ACCESS VIOLATION (attempt to alter non-writeable
> >   ;;;     system structure?)
> <snip>

You replied

> Is it possible that you now have selinux turned on and didn't before?

Well spotted. When I reinstalled linux after my disaster, I did not
remember to check whether I had the same selinux settings as previously.

I have now (at least temporarily) turned off selinux, and the build process
gets much further, then crashes because of a problem with ncurses, which
reminds me of an earlier discussion of ncurses problems by Waldek.

...

Target: x86_64-redhat-linux
 Configured with: ../configure --enable-bootstrap
--enable-languages=c,c++,fortran,objc,obj-c++,ada,go,d,lto --prefix=/usr
--man|
 Thread model: posix
 gcc version 9.3.1 20200408 (Red Hat 9.3.1-2) (GCC)
 
COMPILER_PATH=/usr/libexec/gcc/x86_64-redhat-linux/9/:/usr/libexec/gcc/x86_64-redhat-linux/9/:/usr/libexec/gcc/x86_64-redhat-li|
 
LIBRARY_PATH=/usr/lib/gcc/x86_64-redhat-linux/9/:/usr/lib/gcc/x86_64-redhat-linux/9/../../../../lib64/:/lib/../lib64/:/usr/lib/|
 COLLECT_GCC_OPTIONS='-v' '-no-pie' '-o' 'newpop11'
'-L/usr/local/poplog/v16/poplog_base/pop/extern/lib/' '-mtune=generic'
'-mar|
  /usr/libexec/gcc/x86_64-redhat-linux/9/collect2 -plugin
/usr/libexec/gcc/x86_64-redhat-linux/9/liblto_plugin.so -plugin-opt=/u|
 /usr/bin/ld: cannot find -lncurses
 collect2: error: ld returned 1 exit status

 ;;; MISHAP - POPLINK: ERRORS IN LINKING (see above)

...

It turns out that I have ncurses, but not ncurses-devel, which I'll now try to
install, though at present it seems that the relevant server is not accessible
on the laptop:

I get
        ....
        [Could not resolve host: mirrors.fedoraproject.org]

But it is accessible from my desktop PC so I have to do something about
accessing the fedora server.

It sounds as if that should be simple...

I'll report later.

Thanks.
Aaron

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