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* doc/invoke.texi: Document -Wc99-c11-compat. c-family/ * c.opt (Wc99-c11-compat): New option. c/ * c-decl.c (diagnose_mismatched_decls): Unconditionally call pedwarn_c99 instead of pedwarn. (grokfield): Likewise. (warn_defaults_to): New function. (grokdeclarator): Call warn_defaults_to instead of pedwarn_c99. Unconditionally call pedwarn_c99 instead of pedwarn. (start_function): Call warn_defaults_to instead of pedwarn_c99. (declspecs_add_scspec): Call pedwarn_c99 instead of pedwarn, don't check flag_isoc11 before. * c-errors.c (pedwarn_c99): Change the return type to bool. Handle -Wc99-c11-compat. * c-parser.c (disable_extension_diagnostics): Handle warn_c99_c11_compat. (restore_extension_diagnostics): Likewise. (c_parser_static_assert_declaration_no_semi): Call pedwarn_c99 instead of pedwarn, don't check flag_isoc11 before. (c_parser_declspecs): Likewise. (c_parser_alignas_specifier): Likewise. (c_parser_alignof_expression): Likewise. (c_parser_generic_selection): Likewise. * c-tree.h (pedwarn_c99): Update declaration. * c-typeck.c (c_finish_return): Call pedwarn or warning_at instead of pedwarn_c99. testsuite/ * gcc.dg/Wc99-c11-compat-1.c: New test. * gcc.dg/Wc99-c11-compat-2.c: New test. * gcc.dg/Wc99-c11-compat-3.c: New test. * gcc.dg/Wc99-c11-compat-4.c: New test. * gcc.dg/Wc99-c11-compat-5.c: New test. * gcc.dg/Wc99-c11-compat-6.c: New test. * gcc.dg/Wc99-c11-compat-7.c: New test. From-SVN: r214133
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