[Webkit-unassigned] [Bug 245176] New: [CMake] Clang warnings about C code being built in C++ mode

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=245176

            Bug ID: 245176
           Summary: [CMake] Clang warnings about C code being built in C++
                    mode
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: aperez at igalia.com

I haven't researched the root cause yet, but it looks like either the build is using “clang++”
to compile plain C files, or passing “-x c++” to the “clang” driver (less likely): 

  [3/30/6151|2.0/s|  0%] Building CXX object Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/bmalloc_heap.c.o
  clang-14: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
  [3/31/6151|2.0/s|  0%] Building CXX object Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/bmalloc_heap_config.c.o
  clang-14: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
  [3/39/6151|2.5/s|  0%] Building CXX object Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/jit_heap.c.o
  clang-14: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
  [3/40/6151|2.5/s|  0%] Building CXX object Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/jit_heap_config.c.o
  clang-14: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
  [3/57/6151|3.4/s|  0%] Building CXX object Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/pas_bitfit_page_config_kind.c.o
  clang-14: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
  [3/95/6151|5.3/s|  1%] Building CXX object Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/pas_fast_megapage_cache.c.o
  clang-14: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
  [3/101/6151|5.5/s|  1%] Building CXX object Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/pas_heap_config_kind.c.o
  clang-14: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
  [3/152/6151|7.7/s|  2%] Building CXX object Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/pas_segregated_page_config_kind.c.o
  clang-14: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
  [3/167/6151|8.3/s|  2%] Building CXX object Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/pas_thread_local_cache.c.o
  clang-14: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
  [3/172/6151|8.5/s|  2%] Building CXX object Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/pas_utility_heap_config.c.o
  clang-14: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]

...unless this is intentional and some of the libpas files are expected to be built with a C++
compiler for some reason even if their suffix is “.c” (not very likely, I suppose).

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