PR libfortran/20006
* gfortran.h: Add is_main_program member to symbol_attribute.
* trans-decl: Add a gfor_fndecl_set_std tree.
(gfc_build_builtin_function_decls): Create it.
(gfc_generate_function_code): Add this call at the beginning of
the main program.
* trans.c (gfc_generate_code): Move main_program and attr.
* trans.h: Add declaration for gfor_fndecl_set_std.
* Makefile.am: Add file runtime/compile_options.c.
* Makefile.in: Regenerate.
* libgfortran.h: Create structure compile_options_t. Define the
compile_options variable and GFC_STD_ macros.
* runtime/compile_options.c: New file.
* runtime/error.c (notify_std): New function.
* runtime/main.c (init): Call init_compile_options during
initialization.
* io/format.c: Use the new notify_std function for the $
descriptor extension.
* gfortran.dg/runtime_warning_1.f90: New test.
Co-Authored-By: Steven Bosscher <stevenb@suse.de>
From-SVN: r102990
