Jakub Jelinek wrote:
DW_LANG_Fortran03 and DW_LANG_Fortran08 DW_AT_language values were recently
accepted into DWARF5. This patch changes GCC to handle those similarly to
how e.g. the -std=c++11, -std=c++14 or -std=c11 are handled.
For completeness: gfortran currently produces "GNU Fortran" and
DW_LANG_Fortran95; GCC itself also handles ...Fortran77 and
...Fortran90, but those are not produced with gfortran.
With the patch, it produces for -gdwarf-2/3/4 (4 is default) or
"-gdwarf-5 -std=f95" the same as above. For -std=f2003 -gdwarf-5, it
yields "GNU Fortran2003" and DW_LANG_Fortran2003. And for -gdwarf-5 and
the rest of -std= (f2008, f2008ts, gnu, legacy), it produces "GNU
Fortran2008" and DW_LANG_Fortran2008.
(In principle, they could have prepared for the future and added Fortran
2015 as well.)
Regarding the change: it is fine with me. (However, I wonder how much
will break, once the "|| !dwarf_strict" is enabled, knowing that
compilers are often more frequently updated as debuggers, valgrind and
similar programs. On the other, except of debuggers, most tools should
care much about the DW_LANG.)
Tobias
PS: Talking about DWARF5, do you know when it will be available as
public draft? I am especially looking forward to
http://dwarfstd.org/ShowIssue.php?issue=121221.1 (Allow DW_AT_type with
DW_TAG_string_type), which would be a low-hanging fruit in terms of
implementation. Contrary to the array additions of 130313.5.
As it will take some time for consumers to catch up, I'm enabling that
only if -gdwarf-5 is used for now.
2015-01-27 Jakub Jelinek <ja...@redhat.com>
* dwarf2.h (enum dwarf_source_language): Add DW_LANG_Fortran03
and DW_LANG_Fortran08.
* dwarf2out.c (is_fortran): Also return true for DW_LANG_Fortran03
or DW_LANG_Fortran08.
(lower_bound_default): Return 1 for DW_LANG_Fortran03 or
DW_LANG_Fortran08.
(gen_compile_unit_die): Handle "GNU Fortran2003" and
"GNU Fortran2008" language strings.
* dbxout.c (get_lang_number): Use lang_GNU_Fortran.
* langhooks.h (lang_GNU_Fortran): New prototype.
* langhooks.c (lang_GNU_Fortran): New function.
fortran/
* options.c: Include langhooks.h.
(gfc_post_options): Change lang_hooks.name based on
selected -std= mode.
