[patch #10420] c.m4: Use __has_attribute to check for attribute availability.

[Jacek Caban]

URL:
  <https://savannah.gnu.org/patch/?10420>

                 Summary: c.m4: Use __has_attribute to check for attribute
availability.
                   Group: Bison
               Submitter: jacek
               Submitted: Mon 18 Dec 2023 11:17:50 AM UTC
                Category: None
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any


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Follow-up Comments:


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Date: Mon 18 Dec 2023 11:17:50 AM UTC By: Jacek Caban <jacek>
This fixes -Wunused-but-set-variable warnings on clang msvc targets. Commit
    a166d5450e3f47587b98f6005f9f5627dbe21a5b fixed those warnings in most
cases,
    but currently YY_ATTRIBUTE_UNUSED is defined only when __GNUC__ is
defined.
    When using clang in msvc mode, it's not defined, but __unused__ attribute
    is still available.






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File Attachments:


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Date: Mon 18 Dec 2023 11:17:50 AM UTC  Name:
0001-c.m4-Use-__has_attribute-to-check-for-attribute-availa.txt  Size: 2KiB  
By: jacek

<http://savannah.gnu.org/patch/download.php?file_id=55458>

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