[libc++] Also support target triples that end with .0 in backdeployment tests

[ldionne]

Summary

Sometimes, a target can look like <arch>-apple-macosx10.15.0 instead
of <arch>-apple-macosx10.15. This ensures that the test suite handles
those target triples properly as well.

[ldionne]

Re-upload with parent to trigger CI properly.

[Mordante]

Just curious, but why not squash D146365 and D146359? It seems this patch only modifies the previous patch in the stack.

I've no strong objection against two patches, LGTM.

[ldionne]

In D146365#4204913, @Mordante wrote:

Just curious, but why not squash D146365 and D146359? It seems this patch only modifies the previous patch in the stack.

I've no strong objection against two patches, LGTM.

Oh, it's just that I wanted D146359 not to have any semantic changes since it was already a large mechanical diff.

[ldionne]

Rebase to trigger CI.

libcxx/utils/libcxx/test/features.py

 
 # Define features for back-deployment testing.
 # These features can be used to XFAIL tests that require features in the dylib that
 # were not supported by a certain target. Vendors can tweak how those are defined
 # to match their own releases of the dylib.
 DEFAULT_FEATURES += [
   # Tests that require std::to_chars(floating-point) in the built library
   Feature(name='availability-fp_to_chars-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx{{10.9|10.10|10.11|10.12|10.13|10.14|10.15|11.0}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx{{(10.9|10.10|10.11|10.12|10.13|10.14|10.15|11.0)(.0)?}}', cfg.available_features)),
 
   # Tests that require https://wg21.link/P0482 support in the built library
   Feature(name='availability-char8_t_support-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx{{10.9|10.10|10.11|10.12|10.13|10.14|10.15|11.0}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx{{(10.9|10.10|10.11|10.12|10.13|10.14|10.15|11.0)(.0)?}}', cfg.available_features)),
 
   # Tests that require __libcpp_verbose_abort support in the built library
   Feature(name='availability-verbose_abort-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx{{10.9|10.10|10.11|10.12|10.13|10.14|10.15|11.0|12.0}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx{{(10.9|10.10|10.11|10.12|10.13|10.14|10.15|11.0|12.0)(.0)?}}', cfg.available_features)),
 
   # Tests that require std::bad_variant_access in the built library
   Feature(name='availability-bad_variant_access-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{(9|10|11|12)(.0)?}}', cfg.available_features)),
 
   # Tests that require std::bad_optional_access in the built library
   Feature(name='availability-bad_optional_access-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{(9|10|11|12)(.0)?}}', cfg.available_features)),
 
   # Tests that require std::bad_any_cast in the built library
   Feature(name='availability-bad_any_cast-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{(9|10|11|12)(.0)?}}', cfg.available_features)),
 
   # Tests that require std::pmr support in the built library
   Feature(name='availability-pmr-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx{{10.9|10.10|10.11|10.12|10.13|10.14|10.15|11.0|12.0}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx{{(10.9|10.10|10.11|10.12|10.13|10.14|10.15|11.0|12.0)(.0)?}}', cfg.available_features)),
 
   # Tests that require std::filesystem support in the built library
   Feature(name='availability-filesystem-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{(9|10|11|12|13|14)(.0)?}}', cfg.available_features)),
 
   # Tests that require the C++20 synchronization library (P1135R6 implemented by https://llvm.org/D68480) in the built library
   Feature(name='availability-synchronization_library-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{(9|10|11|12|13|14|15)(.0)?}}', cfg.available_features)),
 
   # Tests that require support for std::shared_mutex and std::shared_timed_mutex in the built library
   Feature(name='availability-shared_mutex-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{(9|10|11)(.0)?}}', cfg.available_features)),
 
   # Tests that require support for aligned allocation in the built library. This is about `operator new(..., std::align_val_t, ...)` specifically,
   # not other forms of aligned allocation.
   Feature(name='availability-aligned_allocation-missing',
-    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12}}', cfg.available_features)),
+    when=lambda cfg: BooleanExpression.evaluate('use_system_cxx_lib && target={{.+}}-apple-macosx10.{{(9|10|11|12)(.0)?}}', cfg.available_features)),
 ]