src/common/compiler.hpp

   1 /*
   2  * Copyright (C) 2023 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #ifndef LTTNG_COMPILER_HPP
   9 #define LTTNG_COMPILER_HPP
  10
  11 /*
  12  * A bug in gcc [6.1, 7.4] causes flexible array members to generate a destructor
  13  * for compound types. In turn, this makes any type that contains a flexible array
  14  * a non-POD object which is a problem under some use-case (e.g., being allocated
  15  * using C-style memory management facilities).
  16  *
  17  * Explicitly specifying a length of zero works around this bug, see:
  18  * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70932
  19  * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71147
  20  */
  21 #if !defined(__clang__) && defined(__GNUC__) && \
  22         ((__GNUC__ == 6 && __GNUC_MINOR__ >= 1) || ((__GNUC__ == 7 && __GNUC_MINOR__ <= 4)))
  23 #define LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH 0
  24 #else
  25 #define LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH
  26 #endif /* gcc version [6.1, 7.4]. */
  27
  28 #endif /* LTTNG_COMPILER_HPP */