[clang] [clang][tools] Handle weak (and duplicate) symbols in clang-extdef-mapping (PR #222010)

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=?utf-8?q?Balázs_Kéri?= <balazs.keri at ericsson.com>,
=?utf-8?q?Balázs_Kéri?= <balazs.keri at ericsson.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/222010 at github.com>


github-actions[bot] wrote:

<!--PREMERGE ADVISOR COMMENT: Linux-->
# :penguin: Linux x64 Test Results

* 61407 tests passed
* 1859 tests skipped
* 1 test failed

## Failed Tests
(click on a test name to see its output)

### Clang
<details>
<summary>Clang.Misc/warning-flags.c</summary>

```
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 1
diagtool list-warnings > /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/test/Misc/Output/warning-flags.c.tmp 2>&1
# executed command: diagtool list-warnings
# note: command had no output on stdout or stderr
# RUN: at line 2
/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck --input-file=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/test/Misc/Output/warning-flags.c.tmp /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/Misc/warning-flags.c
# executed command: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/FileCheck --input-file=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/test/Misc/Output/warning-flags.c.tmp /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/Misc/warning-flags.c
# .---command stderr------------
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/Misc/warning-flags.c:21:8: error: CHECK: expected string not found in input
# | CHECK: Warnings without flags (56):
# |        ^
# | /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/test/Misc/Output/warning-flags.c.tmp:1:1: note: scanning from here
# | Warnings with flags (2261):
# | ^
# | 
# | Input file: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/clang/test/Misc/Output/warning-flags.c.tmp
# | Check file: /home/gha/actions-runner/_work/llvm-project/llvm-project/clang/test/Misc/warning-flags.c
# | 
# | -dump-input=help explains the following input dump.
# | 
# | Input was:
# | <<<<<<
# |             1: Warnings with flags (2261): 
# | check:21'0    {                              search range start (exclusive)
# | check:21'1                                   error: no match found in search range
# |             2:  backslash_newline_space [-Wbackslash-newline-escape] 
# |             3:  compat_c23_c23_attributes [-Wpre-c23-compat] 
# |             4:  compat_c23_c23_pp_directive [-Wpre-c23-compat] 
# |             5:  compat_c23_c_enum_fixed_underlying_type [-Wpre-c23-compat] 
# |             6:  compat_c23_c_label_at_end_of_compound_statement [-Wpre-c23-compat] 
# |             .
# |             .
# |             .
# |          2323:  
# |          2324:  Percentage of warnings with flags: 97.54% 
# |          2325:  Number of unique flags: 1057 
# |          2326:  Average number of diagnostics per flag: 2.139 
# |          2327:  Number in -Wpedantic (not covered by other -W flags): 24 
# |          2328:  
# | check:21'2      } search range end (exclusive)
# | >>>>>>
# `-----------------------------
# error: command failed with exit status: 1

--

```
</details>

If these failures are unrelated to your changes (for example tests are broken or flaky at HEAD), please open an issue at https://github.com/llvm/llvm-project/issues and add the `infrastructure` label.

https://github.com/llvm/llvm-project/pull/222010