[Bug gdb/29989] PowerPC, gdb fails to stop at printf call

["cel at us dot ibm.com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29989

--- Comment #1 from Carl E Love <cel at us dot ibm.com> ---
I was given a suggestion of trying rbreak printf.  When I run this command I
get asked      Make breakpoint pending on future shared library load? (y or
[n]) 
after answering the question a buzillion times you eventually get back to the
gdb prompt.

<function, no debug info> 00000020.plt_call._dl_fatal_printf@@GLIBC_PRIVATE;
Breakpoint 1062 at 0x7ffff7bdb9b4
<function, no debug info> _dl_fatal_printf@plt;
(gdb) 
(gdb) 
(gdb) c
Continuing.

Breakpoint 157, 0x00000000100005a0 in
0000001b.plt_call.__printfieee128@@GLIBC_2.32 ()

not sure exactly where we are but if we do a few step commands we then see

(gdb) s
Single stepping until exit from function __printfieee128@plt,
which has no line number information.

(gdb) s
Single stepping until exit from function __glink_PLTresolve,
which has no line number information.
___ieee128_printf (format=0x10000920 "value is %d\n")
    at ../sysdeps/ieee754/ldbl-128ibm-compat/ieee128-printf.c:24
24      {

(gdb) list
19      #include <stdarg.h>
20      #include <libio/libioP.h>
21      
22      extern int
23      ___ieee128_printf (const char *format, ...)
24      {
25        va_list ap;
26        int done;
27      
28        va_start (ap, format);

not sure what all this means yet but thought is was interesting.

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