GCC C语言处理主要函数之init_pragma

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/* Set up front-end pragmas.  */voidinit_pragma (void){  if (flag_openacc)    {      const int n_oacc_pragmas = sizeof (oacc_pragmas) / sizeof (*oacc_pragmas);      int i;

      for (i = 0; i < n_oacc_pragmas; ++i) cpp_register_deferred_pragma (parse_in, "acc", oacc_pragmas[i].name,          oacc_pragmas[i].id, true, true);    }
  if (flag_openmp)    {      const int n_omp_pragmas = sizeof (omp_pragmas) / sizeof (*omp_pragmas);      int i;
      for (i = 0; i < n_omp_pragmas; ++i) cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas[i].name,          omp_pragmas[i].id, true, true);    }  if (flag_openmp || flag_openmp_simd)    {      const int n_omp_pragmas_simd = sizeof (omp_pragmas_simd)         / sizeof (*omp_pragmas);      int i;
      for (i = 0; i < n_omp_pragmas_simd; ++i) cpp_register_deferred_pragma (parse_in, "omp", omp_pragmas_simd[i].name,          omp_pragmas_simd[i].id, true, true);    }
  if (flag_cilkplus)    cpp_register_deferred_pragma (parse_in, NULL, "simd", PRAGMA_CILK_SIMD,      true, false);
  if (!flag_preprocess_only)    cpp_register_deferred_pragma (parse_in, "GCC", "pch_preprocess",      PRAGMA_GCC_PCH_PREPROCESS, false, false);
  if (!flag_preprocess_only)    cpp_register_deferred_pragma (parse_in, "GCC", "ivdep", PRAGMA_IVDEP, false,      false);
  if (flag_cilkplus)    cpp_register_deferred_pragma (parse_in, "cilk", "grainsize",      PRAGMA_CILK_GRAINSIZE, true, false);
#ifdef HANDLE_PRAGMA_PACK_WITH_EXPANSION  c_register_pragma_with_expansion (0, "pack", handle_pragma_pack);#else  c_register_pragma (0, "pack", handle_pragma_pack);#endif  c_register_pragma (0, "weak", handle_pragma_weak);
  c_register_pragma ("GCC", "visibility", handle_pragma_visibility);
  c_register_pragma ("GCC", "diagnostic", handle_pragma_diagnostic);  c_register_pragma ("GCC", "target", handle_pragma_target);  c_register_pragma ("GCC", "optimize", handle_pragma_optimize);  c_register_pragma ("GCC", "push_options", handle_pragma_push_options);  c_register_pragma ("GCC", "pop_options", handle_pragma_pop_options);  c_register_pragma ("GCC", "reset_options", handle_pragma_reset_options);
  c_register_pragma ("STDC", "FLOAT_CONST_DECIMAL64",       handle_pragma_float_const_decimal64);
  c_register_pragma_with_expansion (0, "redefine_extname",        handle_pragma_redefine_extname);
  c_register_pragma_with_expansion (0, "message", handle_pragma_message);
#ifdef REGISTER_TARGET_PRAGMAS  REGISTER_TARGET_PRAGMAS ();#endif
  global_sso = default_sso;  c_register_pragma (0, "scalar_storage_order",        handle_pragma_scalar_storage_order);
  /* Allow plugins to register their own pragmas. */  invoke_plugin_callbacks (PLUGIN_PRAGMAS, NULL);}

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