On Fedora 31 with the stock systemtap-4.2-1.fc31.x86_64 (stap 4.2/0.177) and kernel-5.3.14-300.fc31.x86_64 probes that attempt to use the bundled tapset functions `ustack`, `ubacktrace`, `print_ubacktrace` etc will fail to compile with:

```
[craig@linux pglogical3-master]$ sudo stap -v dev-tools/stap/backtrace_anywhere.stp $HOME/pg/pg11/ 'unrecognized conflict resolver'
Pass 1: parsed user script and 490 library scripts using 391688virt/165032res/9628shr/155604data kb, in 410usr/40sys/459real ms.
Pass 2: analyzed script: 2 probes, 7 functions, 1 embed, 0 globals using 407908virt/182836res/10772shr/171824data kb, in 160usr/20sys/217real ms.
Pass 3: translated to C into "/tmp/stapFp0X4O/stap_36181c9d60f549fc3d570f1980a16330_4085_src.c" using 407908virt/182968res/10900shr/171824data kb, in 100usr/290sys/562real ms.
In file included from /tmp/stapFp0X4O/stap_36181c9d60f549fc3d570f1980a16330_4085_src.c:159:
/usr/share/systemtap/runtime/stack.c:66:14: error: ‘struct stack_trace’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
   66 |       struct stack_trace *trace);
      |              ^~~~~~~~~~~
/usr/share/systemtap/runtime/stack.c: In function ‘_stp_stack_print_fallback’:
/usr/share/systemtap/runtime/stack.c:202:21: error: storage size of ‘trace’ isn’t known
  202 |  struct stack_trace trace;
      |                     ^~~~~
In file included from ./include/asm-generic/bug.h:5,
                 from ./arch/x86/include/asm/bug.h:83,
                 from ./include/linux/bug.h:5,
                 from ./include/linux/mmdebug.h:5,
                 from ./include/linux/gfp.h:5,
                 from /usr/share/systemtap/runtime/linux/runtime_defines.h:20,
                 from /usr/share/systemtap/runtime/runtime_defines.h:8,
                 from /tmp/stapFp0X4O/stap_36181c9d60f549fc3d570f1980a16330_4085_src.c:11:
/usr/share/systemtap/runtime/unwind/unwind.h: In function ‘read_ptr_sect’:
./include/linux/compiler.h:328:5: error: this statement may fall through [-Werror=implicit-fallthrough=]
  328 |  do {        \
      |     ^
./include/linux/compiler.h:338:2: note: in expansion of macro ‘__compiletime_assert’
  338 |  __compiletime_assert(condition, msg, prefix, suffix)
      |  ^~~~~~~~~~~~~~~~~~~~
./include/linux/compiler.h:350:2: note: in expansion of macro ‘_compiletime_assert’
  350 |  _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
      |  ^~~~~~~~~~~~~~~~~~~
./include/linux/build_bug.h:39:37: note: in expansion of macro ‘compiletime_assert’
   39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
      |                                     ^~~~~~~~~~~~~~~~~~
./include/linux/build_bug.h:50:2: note: in expansion of macro ‘BUILD_BUG_ON_MSG’
   50 |  BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
      |  ^~~~~~~~~~~~~~~~
/usr/share/systemtap/runtime/unwind/unwind.h:159:3: note: in expansion of macro ‘BUILD_BUG_ON’
  159 |   BUILD_BUG_ON(sizeof(u64) != sizeof(value));
      |   ^~~~~~~~~~~~
In file included from /usr/share/systemtap/runtime/unwind.c:16,
                 from /usr/share/systemtap/runtime/linux/runtime.h:255,
                 from /usr/share/systemtap/runtime/runtime.h:26,
                 from /tmp/stapFp0X4O/stap_36181c9d60f549fc3d570f1980a16330_4085_src.c:27:
/usr/share/systemtap/runtime/unwind/unwind.h:164:2: note: here
  164 |  case DW_EH_PE_absptr:
      |  ^~~~
cc1: all warnings being treated as errors
```

e.g.

```
sudo stap -v -e 'probe process("/lib64/libc.so.6").function("fsync") { print_ubacktrace(); }'
```

See also https://sourceware.org/bugzilla/show_bug.cgi?id=24923