+2010-10-19 Francois-Xavier Coudert<fxcoudert@gcc.gnu.org>
+
+ PR fortran/43414
+ * dwarf2out.c (add_calling_convention_attribute): Flag main
+ Fortran subroutine with DW_AT_main_subprogram.
+
2010-10-19 Nick Clifton <nickc@redhat.com>
* config/rx/rx.c (rx_function_value): Small integer types are
value = ((enum dwarf_calling_convention)
targetm.dwarf_calling_convention (TREE_TYPE (decl)));
- /* DWARF doesn't provide a way to identify a program's source-level
- entry point. DW_AT_calling_convention attributes are only meant
- to describe functions' calling conventions. However, lacking a
- better way to signal the Fortran main program, we use this for the
- time being, following existing custom. */
if (is_fortran ()
&& !strcmp (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)), "MAIN__"))
- value = DW_CC_program;
+ {
+ /* DWARF 2 doesn't provide a way to identify a program's source-level
+ entry point. DW_AT_calling_convention attributes are only meant
+ to describe functions' calling conventions. However, lacking a
+ better way to signal the Fortran main program, we used this for
+ a long time, following existing custom. Now, DWARF 4 has
+ DW_AT_main_subprogram, which we add below, but some tools still
+ rely on the old way, which we thus keep. */
+ value = DW_CC_program;
+
+ if (dwarf_version >= 4 || !dwarf_strict)
+ add_AT_flag (subr_die, DW_AT_main_subprogram, 1);
+ }
/* Only add the attribute if the backend requests it, and
is not DW_CC_normal. */