oeqa/sdk: Simplify test specification and discovery

Simplify how tests are specified and discovered for different SDK configurations
to allow per-layer customization.

* Introduce `TESTSDK_CASE_DIRS` variable to specify test directory types,
  replacing the need to modify the default_cases class member

* Discover tests from configured layers using a common discovery pattern
  (`<LAYER_DIR>/lib/oeqa/<dirname>/cases`) where `<dirname>` is specified in `TESTSDK_CASE_DIRS`

* The buildtools directories were renamed to follow the common discovery pattern
(`<LAYER_DIR>/lib/oeqa/<dirname>/cases`) for consistency across all SDK configurations.

  meta/lib/oeqa/
  ├── sdk/cases/              # Standard SDK: dirname="sdk"
  ├── buildtools/cases/       # Buildtools: dirname="buildtools"
  └── buildtools-docs/cases/  # Buildtools-docs: dirname="buildtools-docs"

  meta-mingw/lib/oeqa/
  └── sdkmingw/cases/         # MinGW: dirname="sdkmingw"

  meta-foo/lib/oeqa/
  └── sdk/cases/              # Standard SDK: dirname="sdk"

Tested by:

1. Adding new tests using the default discovery pattern `<LAYER_DIR>/lib/oeqa/sdk/cases` and
   verifying they are discovered and executed.

2. Verifying existing SDK configuration tests work (requires -c populate_sdk first):
   * Standard SDK: `bitbake core-image-minimal -c testsdk`
   * Buildtools tarball: `bitbake buildtools-tarball -c testsdk`
   * Buildtools docs tarball: `bitbake buildtools-docs-tarball -c testsdk`
   * Mingw SDK: (SDKMACHINE = "x86_64-mingw32") `bitbake core-image-minimal -c testsdk`

(From OE-Core rev: bde94c128c0b4e7e1ebea40f582b4dd6dcc965ff)

Signed-off-by: Thune Tran <thune.a.tran@boeing.com>
Signed-off-by: Chuck Wolber <chuck.wolber@boeing.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/meta/lib/oeqa/buildtools/cases/gcc.py b/meta/lib/oeqa/buildtools/cases/gcc.py
new file mode 100644
index 0000000000..a62c4d0bc4
--- /dev/null
+++ b/meta/lib/oeqa/buildtools/cases/gcc.py
@@ -0,0 +1,31 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: MIT
+#
+
+import os.path
+from oeqa.sdk.case import OESDKTestCase
+
+class GccTests(OESDKTestCase):
+    def test_verify_specs(self):
+        """
+        Verify that the compiler has been relocated successfully and isn't
+        looking in the hard-coded prefix.
+        """
+        # Canonicalise the SDK root
+        sdk_base = os.path.realpath(self.tc.sdk_dir)
+        # Canonicalise the location of GCC
+        gcc_path = os.path.realpath(self._run("command -v gcc").strip())
+        # Skip the test if the GCC didn't come from the buildtools, as it only
+        # comes with buildtools-extended-tarball.
+        if os.path.commonprefix((sdk_base, gcc_path)) != sdk_base:
+            self.skipTest("Buildtools does not provide GCC")
+
+        # This is the prefix that GCC is build with, and should be replaced at
+        # installation time.
+        sdkpath = self.td.get("SDKPATH")
+        self.assertTrue(sdkpath)
+
+        for line in self._run('gcc -dumpspecs').splitlines():
+            self.assertNotIn(sdkpath, line)