[clang] [C2y] Claim support for WG14 N3623 (PR #162843)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-aarch64-darwin` running on `doug-worker-5` while building `clang` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/190/builds/28819

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'Clang :: C/C2y/n3623.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=c2y -DSTD1 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 1
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=c2y -DSTD1 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=c2y -DSTD2 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 2
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=c2y -DSTD2 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify=gnu1 -std=gnu2y -DGNU1 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 3
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify=gnu1 -std=gnu2y -DGNU1 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=gnu2y -DGNU2 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 4
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=gnu2y -DGNU2 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify=gnu3 -std=gnu2y -DGNU3 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 5
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify=gnu3 -std=gnu2y -DGNU3 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=gnu2y -DGNU4 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 6
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=gnu2y -DGNU4 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=gnu2y -DGNU5 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 7
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=gnu2y -DGNU5 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=gnu2y -DGNU6 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 8
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify -std=gnu2y -DGNU6 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify=gnu7 -std=gnu2y -DGNU7 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 9
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify=gnu7 -std=gnu2y -DGNU7 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -triple x86_64-apple-darwin12 -verify -std=c2y -DDARWIN1 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 10
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -triple x86_64-apple-darwin12 -verify -std=c2y -DDARWIN1 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -triple x86_64-pc-win32-mscv -verify -std=c2y -fms-compatibility -DMS1 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 11
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -triple x86_64-pc-win32-mscv -verify -std=c2y -fms-compatibility -DMS1 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -triple x86_64-pc-win32-mscv -verify -std=c2y -fms-compatibility -DMS2 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 12
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -triple x86_64-pc-win32-mscv -verify -std=c2y -fms-compatibility -DMS2 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
/Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify=invalid -std=c2y -DINVALID1 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c # RUN: at line 13
+ /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/bin/clang -cc1 -internal-isystem /Volumes/ExternalSSD/buildbot-root/aarch64-darwin/build/lib/clang/22/include -nostdsysteminc -verify=invalid -std=c2y -DINVALID1 /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c
error: 'invalid-error' diagnostics expected but not seen: 
  File /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c Line 67: too many parameters (4) for 'main': must be 0, 2, or 3
error: 'invalid-error' diagnostics seen but not expected: 
  File /Users/buildbot/buildbot-root2/aarch64-darwin/llvm-project/clang/test/C/C2y/n3623.c Line 67: fourth parameter of 'main' (platform-specific data) must be of type 'char **'
2 errors generated.

--

********************


```

</details>

https://github.com/llvm/llvm-project/pull/162843