https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87495
Bug ID: 87495
Summary: Warning: ‘fastcall’ attribute ignored [-Wattributes]
for !GCC$ ATTRIBUTES
Product: gcc
Version: 9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: marxin at gcc dot gnu.org
Target Milestone: ---
Looks GCC ATTRIBUTES are broken:
$ cat fortran-options.f90
program test
interface
subroutine sub1()
end subroutine sub1
subroutine sub2()
!GCC$ ATTRIBUTES CDECL :: sub2
end subroutine sub2
subroutine sub3()
!GCC$ ATTRIBUTES STDCALL :: sub3
end subroutine sub3
subroutine sub4()
!GCC$ ATTRIBUTES FASTCALL :: sub4
end subroutine sub4
end interface
!gcc$ attributes cdecl :: cdecl
!gcc$ attributes stdcall :: stdcall
procedure(), pointer :: ptr
procedure(), pointer :: cdecl
procedure(), pointer :: stdcall
procedure(), pointer :: fastcall
!gcc$ attributes fastcall :: fastcall
! Valid:
ptr => sub1
cdecl => sub2
stdcall => sub3
fastcall => sub4
end program
$ gfortran fortran-options.f90 -c
fortran-options.f90:26:0:
cdecl => sub2
Warning: ‘cdecl’ attribute ignored [-Wattributes]
fortran-options.f90:26:0: Warning: ‘cdecl’ attribute ignored [-Wattributes]
fortran-options.f90:27:0:
stdcall => sub3
Warning: ‘stdcall’ attribute ignored [-Wattributes]
fortran-options.f90:27:0: Warning: ‘stdcall’ attribute ignored [-Wattributes]
fortran-options.f90:28:0:
fastcall => sub4
Warning: ‘fastcall’ attribute ignored [-Wattributes]
fortran-options.f90:28:0: Warning: ‘fastcall’ attribute ignored [-Wattributes]
It's for GCC 7.1.0+. Very old versions (4.8.0+) also suffer.
In between 5.1.0 and 6.4.0 I see ICE that was fixed in r246203.
