Explicitly link to OpenMP

[xhochy]

Fixes #220

Checklist

• Added a CHANGELOG.rst entry

[xhochy]

Manually tested that the produced M1 wheel works.

[jtilly]

(How) is this related to

tabmat/setup.py

Lines 62 to 86 in fbf7755

	elif sys.platform == "darwin":
	jemalloc_config = shutil.which("jemalloc-config")
	if "JE_INSTALL_SUFFIX" in os.environ:
	je_install_suffix = os.environ["JE_INSTALL_SUFFIX"]
	elif jemalloc_config is None:
	je_install_suffix = ""
	else:
	pkg_info = (
	Path(jemalloc_config).parent.parent / "lib" / "pkgconfig" / "jemalloc.pc"
	).read_text()
	je_install_suffix = [
	i.split("=")[1]
	for i in pkg_info.split("\n")
	if i.startswith("install_suffix=")
	].pop()
	allocator_libs = [f"jemalloc{je_install_suffix}"]
	extra_compile_args = [
	"-Xpreprocessor",
	"-fopenmp",
	"-O3",
	"-ffast-math",
	"--std=c++17",
	f"-DJEMALLOC_INSTALL_SUFFIX={je_install_suffix}",
	]
	extra_link_args = ["-lomp"]

?

[xhochy]

With the fix above, it might work without these flags again. Let's try.