1  /*
       2   * Copyright (c) 2020 Dmitry V. Levin <ldv@altlinux.org>
       3   */
       4  
       5  #ifndef PAM_CC_COMPAT_H
       6  #define PAM_CC_COMPAT_H
       7  
       8  #include "config.h"
       9  #include <security/_pam_types.h>
      10  
      11  #if defined __clang__ && defined __clang_major__ && defined __clang_minor__
      12  # define PAM_CLANG_PREREQ(maj, min)					\
      13  	((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
      14  #else
      15  # define PAM_CLANG_PREREQ(maj, min)	0
      16  #endif
      17  
      18  #if PAM_GNUC_PREREQ(2, 7)
      19  # define PAM_ATTRIBUTE_ALIGNED(arg)	__attribute__((__aligned__(arg)))
      20  #else
      21  # define PAM_ATTRIBUTE_ALIGNED(arg)	/* empty */
      22  #endif
      23  
      24  #if PAM_GNUC_PREREQ(4, 6)
      25  # define DIAG_PUSH_IGNORE_CAST_QUAL					\
      26  	_Pragma("GCC diagnostic push");					\
      27  	_Pragma("GCC diagnostic ignored \"-Wcast-qual\"")
      28  # define DIAG_POP_IGNORE_CAST_QUAL					\
      29  	_Pragma("GCC diagnostic pop")
      30  # define DIAG_PUSH_IGNORE_CAST_ALIGN					\
      31  	_Pragma("GCC diagnostic push");					\
      32  	_Pragma("GCC diagnostic ignored \"-Wcast-align\"")
      33  # define DIAG_POP_IGNORE_CAST_ALIGN					\
      34  	_Pragma("GCC diagnostic pop")
      35  # define DIAG_PUSH_IGNORE_FORMAT_NONLITERAL				\
      36  	_Pragma("GCC diagnostic push");					\
      37  	_Pragma("GCC diagnostic ignored \"-Wformat-nonliteral\"")
      38  # define DIAG_POP_IGNORE_FORMAT_NONLITERAL				\
      39  	_Pragma("GCC diagnostic pop")
      40  #elif PAM_CLANG_PREREQ(2, 6)
      41  # define DIAG_PUSH_IGNORE_CAST_QUAL					\
      42  	_Pragma("clang diagnostic push");				\
      43  	_Pragma("clang diagnostic ignored \"-Wcast-qual\"")
      44  # define DIAG_POP_IGNORE_CAST_QUAL					\
      45  	_Pragma("clang diagnostic pop")
      46  # define DIAG_PUSH_IGNORE_CAST_ALIGN					\
      47  	_Pragma("clang diagnostic push");				\
      48  	_Pragma("clang diagnostic ignored \"-Wcast-align\"")
      49  # define DIAG_POP_IGNORE_CAST_ALIGN					\
      50  	_Pragma("clang diagnostic pop")
      51  # define DIAG_PUSH_IGNORE_FORMAT_NONLITERAL				\
      52  	_Pragma("clang diagnostic push");				\
      53  	_Pragma("clang diagnostic ignored \"-Wformat-nonliteral\"")
      54  # define DIAG_POP_IGNORE_FORMAT_NONLITERAL				\
      55  	_Pragma("clang diagnostic pop")
      56  #else
      57  # define DIAG_PUSH_IGNORE_CAST_QUAL		/* empty */
      58  # define DIAG_POP_IGNORE_CAST_QUAL		/* empty */
      59  # define DIAG_PUSH_IGNORE_CAST_ALIGN		/* empty */
      60  # define DIAG_POP_IGNORE_CAST_ALIGN		/* empty */
      61  # define DIAG_PUSH_IGNORE_FORMAT_NONLITERAL	/* empty */
      62  # define DIAG_POP_IGNORE_FORMAT_NONLITERAL	/* empty */
      63  #endif
      64  
      65  /*
      66   * Evaluates to
      67   * 1, if the given two types are known to be the same
      68   * 0, otherwise.
      69   */
      70  #if PAM_GNUC_PREREQ(3, 0)
      71  # define PAM_IS_SAME_TYPE(x_, y_)					\
      72  	__builtin_types_compatible_p(__typeof__(x_), __typeof__(y_))
      73  #else
      74  /* Cannot tell whether these types are the same.  */
      75  # define PAM_IS_SAME_TYPE(x_, y_)	0
      76  #endif
      77  
      78  #endif /* PAM_CC_COMPAT_H */