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forkfd: fix Clang 15 ATOMIC_VAR_INIT deprecation warning

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Replace the macro use with the expansion of the macro as it appears in
both libc++ as well as libstdc++.

Fixes Clang 15 C++20 warning-turned-error:

  forkfd.c:157:39: error: macro 'ATOMIC_VAR_INIT' has been marked as deprecated [-Werror,-Wdeprecated-pragma]
  static ffd_atomic_int forkfd_status = FFD_ATOMIC_INIT(0);
                                        ^
  forkfd_c11.h:51:37: note: expanded from macro 'FFD_ATOMIC_INIT'
  #define FFD_ATOMIC_INIT(val)        ATOMIC_VAR_INIT(val)
                                      ^
  /d/llvm/15/bin/../include/c++/v1/atomic:2671:43: note: macro marked 'deprecated' here
  #  pragma clang deprecated(ATOMIC_VAR_INIT)
                                            ^

Matching OpenDCDiag pull request:
https://github.com/opendcdiag/opendcdiag/pull/159

Pick-to: 6.4 6.3 6.2 5.15
Change-Id: I0204f7fcd6039624ed75d414daf9b6a771bfd9d0
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
This commit is contained in:
Marc Mutz 2022-09-30 13:02:05 +02:00 committed by Thiago Macieira
parent 71f32653cb
commit 35649760e5
1 changed files with 4 additions and 0 deletions
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4
src/3rdparty/forkfd/forkfd_c11.h vendored
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@ -48,7 +48,11 @@ typedef std::atomic<int> ffd_atomic_int;
typedef atomic_int ffd_atomic_int;
#endif
#ifdef __cpp_lib_atomic_value_initialization
#define FFD_ATOMIC_INIT(val) { val }
#else
#define FFD_ATOMIC_INIT(val) ATOMIC_VAR_INIT(val)
#endif
#define ffd_atomic_load(ptr, order) \
atomic_load_explicit(ptr, order)