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f54c9067a0
Add a basic test for the toolchain switching code: set the toolchain to GCC by default but Clang for a specific recipe, and verify that two recipes are built with the expected compiler. This works because before we strip the installed binaries there is a .comment segment that contains the list of toolchains used. (From OE-Core rev: 7988c32191927f1c6db422c959eab7a03dfeda04) Signed-off-by: Ross Burton <ross.burton@arm.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
72 lines
2.5 KiB
Python
72 lines
2.5 KiB
Python
#
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# Copyright OpenEmbedded Contributors
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#
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# SPDX-License-Identifier: MIT
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#
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import shutil
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import subprocess
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import tempfile
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from types import SimpleNamespace
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import oe.path
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from oeqa.selftest.case import OESelftestTestCase
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from oeqa.utils.commands import bitbake, get_bb_var, get_bb_vars
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class ToolchainTests(OESelftestTestCase):
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def test_toolchain_switching(self):
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"""
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Test that a configuration that uses GCC by default but clang for one
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specific recipe does infact do that.
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"""
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def extract_comment(objcopy, filename):
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"""
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Using the specified `objcopy`, return the .comment segment from
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`filename` as a bytes().
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"""
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with tempfile.NamedTemporaryFile(prefix="comment-") as f:
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cmd = [objcopy, "--dump-section", ".comment=" + f.name, filename]
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subprocess.run(cmd, check=True)
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# clang's objcopy writes to a temporary file and renames, so we need to re-open.
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with open(f.name, "rb") as f2:
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return f2.read()
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def check_recipe(recipe, filename, override, comment_present, comment_absent=None):
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"""
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Check that `filename` in `recipe`'s bindir contains `comment`, and
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the overrides contain `override`.
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"""
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d = SimpleNamespace(**get_bb_vars(("D", "bindir", "OBJCOPY", "OVERRIDES", "PATH"), target=recipe))
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self.assertIn(override, d.OVERRIDES)
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binary = oe.path.join(d.D, d.bindir, filename)
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objcopy = shutil.which(d.OBJCOPY, path=d.PATH)
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self.assertIsNotNone(objcopy)
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comment = extract_comment(objcopy, binary)
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self.assertIn(comment_present, comment)
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if comment_absent:
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self.assertNotIn(comment_absent, comment)
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# GCC by default, clang for selftest-hello.
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self.write_config("""
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TOOLCHAIN = "gcc"
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TOOLCHAIN:pn-selftest-hello = "clang"
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""")
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# Force these recipes to re-install so we can extract the .comments from
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# the install directory, as they're stripped out of the final packages.
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bitbake("m4 selftest-hello -C install")
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# m4 should be built with GCC and only GCC
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check_recipe("m4", "m4", "toolchain-gcc", b"GCC: (GNU)", b"clang")
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# helloworld should be built with clang. We can't assert that GCC is not
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# present as it will be linked against glibc which is built with GCC.
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check_recipe("selftest-hello", "helloworld", "toolchain-clang", b"clang version")
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