sdcc/device/include/gcc_attr.h

   1 /* Macro voodoo rewriting GCC-style attributes to C23-style attributes. */
   2 /* Can be used via "--include gcc_attr.h" on the command line. */
   3
   4 #if __STDC_VERSION__ < 202311L
   5
   6 /* Not in C23 mode => remove GCC-style attributes */
   7 #warning "Rewriting GCC-style to C23-style attributes requires C23. Ignoring all GCC-style attributes."
   8 #define __attribute__(__GCC_ATTR_ARG)
   9
  10 #else
  11
  12 /* In C23 mode => translate to C23-style attributes */
  13 /* e.g. from __attribute__((packed, foo(bar))) to [[packed, foo(bar)]] */
  14 #warning "Rewriting GCC-style to C23-style attributes. Please check compatibility."
  15 #define __GCC_ATTR_LIST_ARGS(...) __VA_ARGS__
  16 #define __GCC_ATTR_UNWRAP_ARG(__GCC_ATTR_ARG) __GCC_ATTR_ARG
  17 #define __attribute__(__GCC_ATTR_ARG) [[__GCC_ATTR_UNWRAP_ARG(__GCC_ATTR_LIST_ARGS __GCC_ATTR_ARG)]]
  18
  19 #endif