Re: Program segfaults if compiled with -pg and linked to shared library

[RVP <rvp%SDF.ORG@localhost>]

On Thu, 4 Mar 2021, RVP wrote:

> On Wed, 3 Mar 2021, Christos Zoulas wrote:
>
> > > If you compile with -Bstatic -lc_g -Bdynamic explicitly I think it works.
> > > So perhaps there is a libc issue.
> >
> > Err -Bstatic -lc_p -Bdynamic
>
> If this is the command you meant, then it doesn't work either:
>
> $ cc -g -pg t.c -Bstatic -lc_p -Bdynamic -lcurses
> ld: /usr/lib/libc.so.12: warning: warning: __findenv is an internal obsolete 
> function.
> $ ./a.out
> Segmentation fault (core dumped)
> $

However, this works:

$ cc -g -pg t.c -Bstatic -lc -Bdynamic -lcurses
$ ldd a.out
a.out:
        -lc.12 => /usr/lib/libc.so.12
        -lcurses.8 => /usr/lib/libcurses.so.8
        -lterminfo.1 => /usr/lib/libterminfo.so.1
$ ./a.out
hello world
$ ls -l gmon.out
-rw-------  1 rvp  wheel  584 Mar  4 09:12 gmon.out
$ gprof a.out gmon.out
...
Index by function name

   [1] main
$

No segfault; but, no profiling data either ;)

-RVP