https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100725
Bug ID: 100725
Summary: dwarf error with --whole-program
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: debug
Assignee: unassigned at gcc dot gnu.org
Reporter: fx at gnu dot org
Target Milestone: ---
Extending my example in #100724 with -g, I see a dwarf error, which I assume is
a separate issue:
$ cat test.f90
module tw
interface
real function twice (x)
end function twice
end interface
end module tw
real function twice (x)
twice = 2*x
end function twice
use tw
read *, x
print *, twice (x)
end
$ gfortran-11 -O2 -g -fwhole-program test.f90
/usr/bin/ld: /usr/bin/ld: DWARF error: can't find .debug_ranges section.
/tmp/cc8sFtAX.o: in function `MAIN__':
test.f90:(.text+0x7f): undefined reference to `twice_'
collect2: error: ld returned 1 exit status
Changing -g to -gdwarf-4 avoids the error, as does removing -fwhole-program.
It also works with gcc-10 and -gdwarf-5. The system is Debian 10 amd64
(binutils 2.31.1, if that matters).
