+ /* Use tree inlining. */
+ if (!flag_no_inline)
+ flag_no_inline = 1;
+ if (flag_inline_functions)
+ flag_inline_trees = 2;
+
+ /* By default we use C99 inline semantics in GNU99 or C99 mode. C99
+ inline semantics are not supported in GNU89 or C89 mode. */
+ if (flag_gnu89_inline == -1)
+ flag_gnu89_inline = !flag_isoc99;
+ else if (!flag_gnu89_inline && !flag_isoc99)
+ error ("-fno-gnu89-inline is only supported in GNU99 or C99 mode");
+
+ /* If we are given more than one input file, we must use
+ unit-at-a-time mode. */
+ if (num_in_fnames > 1)
+ flag_unit_at_a_time = 1;
+
+ /* Default to ObjC sjlj exception handling if NeXT runtime. */
+ if (flag_objc_sjlj_exceptions < 0)
+ flag_objc_sjlj_exceptions = flag_next_runtime;
+ if (flag_objc_exceptions && !flag_objc_sjlj_exceptions)
+ flag_exceptions = 1;
+
+ /* -Wextra implies -Wclobbered, -Wempty-body, -Wsign-compare,
+ -Wmissing-field-initializers, -Wmissing-parameter-type
+ -Wold-style-declaration, and -Woverride-init,
+ but not if explicitly overridden. */
+ if (warn_clobbered == -1)
+ warn_clobbered = extra_warnings;
+ if (warn_empty_body == -1)
+ warn_empty_body = extra_warnings;
+ if (warn_sign_compare == -1)
+ warn_sign_compare = extra_warnings;
+ if (warn_missing_field_initializers == -1)
+ warn_missing_field_initializers = extra_warnings;
+ if (warn_missing_parameter_type == -1)
+ warn_missing_parameter_type = extra_warnings;
+ if (warn_old_style_declaration == -1)
+ warn_old_style_declaration = extra_warnings;
+ if (warn_override_init == -1)
+ warn_override_init = extra_warnings;
+
+ /* -Wpointer_sign is disabled by default, but it is enabled if any
+ of -Wall or -pedantic are given. */
+ if (warn_pointer_sign == -1)
+ warn_pointer_sign = 0;
+
+ /* -Woverlength-strings is off by default, but is enabled by -pedantic.
+ It is never enabled in C++, as the minimum limit is not normative
+ in that standard. */
+ if (warn_overlength_strings == -1 || c_dialect_cxx ())
+ warn_overlength_strings = 0;
+
+ /* Adjust various flags for C++ based on command-line settings. */
+ if (c_dialect_cxx ())