Re: [PATCH v6 0/9] perf c2c: add a function view

Hi Namhyung,

Thanks for reporting this. I reproduced the Python import failure. Although
the loader reported c2c_fmt_free, checking with `ldd -r` showed four
unresolved symbols from c2c-function.o: c2c, c2c_fmt_equal, c2c_fmt_free,
and perf_c2c__browse_cacheline.

I considered moving the formatter callbacks to util/ as suggested. However,
that would still leave c2c, the command's global state, and
perf_c2c__browse_cacheline(), its existing TUI entry point, unresolved.

The issue comes from placing c2c-function.o in libperf-ui.a, which is linked
into python/perf.so under --whole-archive, while builtin-c2c.o is not part
of the Python module. Since the browser is specific to the c2c command, v7
links it directly into perf alongside builtin-c2c.o, under CONFIG_SLANG.

This is folded into the browser skeleton patch; the other eight patches are
unchanged. I clean-built every commit and ran `perf test -v 'import perf'`
at each step. I also verified the full series with and without SLANG.

The `--stdio` support and function-view test will follow on top of v7.

Thanks,
Jiebin