gcc/patches/10_all_gcc49_default-fortify-source.patch

   1 Enable -D_FORTIFY_SOURCE=2 by default.
   2
   3
   4 --- a/gcc/c-family/c-cppbuiltin.c
   5 +++ b/gcc/c-family/c-cppbuiltin.c
   6 @@ -951,6 +951,9 @@ c_cpp_builtins (cpp_reader *pfile)
   7    builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX, 0);
   8    builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix, 0);
   9
  10 +  /* Fortify Source enabled by default w/optimization.  */
  11 +  cpp_define (pfile, "_FORTIFY_SOURCE=((defined __OPTIMIZE__ && __OPTIMIZE__ > 0) ? 2 : 0)");
  12 +
  13    /* Misc.  */
  14    if (flag_gnu89_inline)
  15      cpp_define (pfile, "__GNUC_GNU_INLINE__");
  16 --- a/gcc/doc/gcc.info
  17 +++ b/gcc/doc/gcc.info
  18 @@ -6255,6 +6255,11 @@ find out the exact set of optimizations that are enabled at each level.
  19       Please note the warning under '-fgcse' about invoking '-O2' on
  20       programs that use computed gotos.
  21
  22 +     NOTE: In Gentoo, `-D_FORTIFY_SOURCE=2' is set by default, and is
  23 +     activated when `-O' is set to 2 or higher.  This enables additional
  24 +     compile-time and run-time checks for several libc functions.  To disable,
  25 +     specify either `-U_FORTIFY_SOURCE' or `-D_FORTIFY_SOURCE=0'.
  26 +
  27  '-O3'
  28       Optimize yet more.  '-O3' turns on all optimizations specified by
  29       '-O2' and also turns on the '-finline-functions',