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#
# Copyright OpenEmbedded Contributors
#
# SPDX-License-Identifier: MIT
#
import shutil
import subprocess
import tempfile
from types import SimpleNamespace
import oe.path
from oeqa.selftest.case import OESelftestTestCase
from oeqa.utils.commands import bitbake, get_bb_var, get_bb_vars
class ToolchainTests(OESelftestTestCase):
def test_toolchain_switching(self):
"""
Test that a configuration that uses GCC by default but clang for one
specific recipe does infact do that.
"""
def extract_comment(objcopy, filename):
"""
Using the specified `objcopy`, return the .comment segment from
`filename` as a bytes().
"""
with tempfile.NamedTemporaryFile(prefix="comment-") as f:
cmd = [objcopy, "--dump-section", ".comment=" + f.name, filename]
subprocess.run(cmd, check=True)
# clang's objcopy writes to a temporary file and renames, so we need to re-open.
with open(f.name, "rb") as f2:
return f2.read()
def check_recipe(recipe, filename, override, comment_present, comment_absent=None):
"""
Check that `filename` in `recipe`'s bindir contains `comment`, and
the overrides contain `override`.
"""
d = SimpleNamespace(**get_bb_vars(("D", "bindir", "OBJCOPY", "OVERRIDES", "PATH"), target=recipe))
self.assertIn(override, d.OVERRIDES)
binary = oe.path.join(d.D, d.bindir, filename)
objcopy = shutil.which(d.OBJCOPY, path=d.PATH)
self.assertIsNotNone(objcopy)
comment = extract_comment(objcopy, binary)
self.assertIn(comment_present, comment)
if comment_absent:
self.assertNotIn(comment_absent, comment)
# GCC by default, clang for selftest-hello.
self.write_config("""
TOOLCHAIN = "gcc"
TOOLCHAIN:pn-selftest-hello = "clang"
""")
# Force these recipes to re-install so we can extract the .comments from
# the install directory, as they're stripped out of the final packages.
bitbake("m4 selftest-hello -C install")
# m4 should be built with GCC and only GCC
check_recipe("m4", "m4", "toolchain-gcc", b"GCC: (GNU)", b"clang")
# helloworld should be built with clang. We can't assert that GCC is not
# present as it will be linked against glibc which is built with GCC.
check_recipe("selftest-hello", "helloworld", "toolchain-clang", b"clang version")
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