setup: drop legacy osx compiler tuning to enable universal builds
This was triggering deprecation warnings about migrating to `packaging.version`
from `distutils` Version classes with `make local`. But rather than migrate
that code, let's just get rid of some ~10-12 year old workarounds. As a bonus,
the cext libraries that are built are now universal binaries containing x86_64
and arm64 images (at least when built on macOS 11.4 with Xcode 12.5 and the
universal version of Python 3.9.13).
Several things to note here:
- Apple dropped support for 10.15 in Nov 2022, and OS X Lion that is
referenced is 10.7 (unsupported since late 2014)
- `xcode4` was basically always True because of the `>=` check (10.8 used
Xcode 5, and I have Xcode 10.2 on 10.14)
- `xcode51` was always False for modern-ish Xcode, because of the exact
version string matching
- Python 3.8 only supports OS X 10.9+; the Python 3.9.1+ universal installer
is macOS 11+ only, and Python 3.10 drops the x86_64 installer to deliver
only the universal installer.
All of this is to say, the only thing lost by dropping this code on modern Xcode
is that `os.environ['ARCHFLAGS'] = ''` is no longer set. But we probably
shouldn't be setting that anymore, as shown by the universal libraries now being
generated. I was able to `make local` and `python3 run-tests.py --local` with
python 3.9.9, Xcode 10.2, and macOS 10.14.6, and didn't incur any more than the
usual few test errors, so this should still work on some older versions of
macOS.
#include <Python.h>
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <string>
#include "pyutil.h"
extern "C" {
static PYCODETYPE *code;
extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv)
{
contrib::initpy(*argv[0]);
code = (PYCODETYPE *)Py_CompileString(R"py(
for inline in (True, False):
try:
index, cache = parsers.parse_index2(data, inline)
index.slicechunktodensity(list(range(len(index))), 0.5, 262144)
index.stats()
index.findsnapshots({}, 0, len(index) - 1)
10 in index
for rev in range(len(index)):
index.reachableroots(0, [len(index)-1], [rev])
node = index[rev][7]
partial = index.shortest(node)
index.partialmatch(node[:partial])
index.deltachain(rev, None, True)
except Exception as e:
pass
# uncomment this print if you're editing this Python code
# to debug failures.
# print e
)py",
"fuzzer", Py_file_input);
return 0;
}
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
{
// Don't allow fuzzer inputs larger than 60k, since we'll just bog
// down and not accomplish much.
if (Size > 60000) {
return 0;
}
PyObject *text =
PyBytes_FromStringAndSize((const char *)Data, (Py_ssize_t)Size);
PyObject *locals = PyDict_New();
PyDict_SetItemString(locals, "data", text);
PyObject *res = PyEval_EvalCode(code, contrib::pyglobals(), locals);
if (!res) {
PyErr_Print();
}
Py_XDECREF(res);
Py_DECREF(locals);
Py_DECREF(text);
return 0; // Non-zero return values are reserved for future use.
}
}