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From: "sgk at troutmask dot apl.washington.edu" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/97224] [8/9/10/11 Regression] SPECCPU 2006 Gamess fails
 to build after g:e5a76af3a2f3324efc60b4b2778ffb29d5c377bc
Date: Mon, 28 Sep 2020 14:42:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97224

--- Comment #6 from Steve Kargl <sgk at troutmask dot apl.washington.edu> -=
--
On Mon, Sep 28, 2020 at 09:48:13AM +0000, tnfchris at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97224
>=20
>             Bug ID: 97224
>            Summary: [8/9/10/11 Regression] SPECCPU 2006 Gamess fails to
>                     build after g:e5a76af3a2f3324efc60b4b2778ffb29d5c377bc
>            Product: gcc
>            Version: 11.0
>             Status: UNCONFIRMED
>           Severity: normal
>           Priority: P3
>          Component: fortran
>           Assignee: unassigned at gcc dot gnu.org
>           Reporter: tnfchris at gcc dot gnu.org
>                 CC: kargl at gcc dot gnu.org, markeggleston at gcc dot gn=
u.org
>   Target Milestone: ---
>=20
> The benchmark fails to build after
> r11-3487-ge5a76af3a2f3324efc60b4b2778ffb29d5c377bc with the following err=
or:
>=20
>   108 |       SUBROUTINE AIMPAC(ACO,AIC,EXPON,ICENT,ITYPE,OE,OCCNO,
>       |                       1
> ......
>   920 |       COMMON /INTRFC/ FRIEND,AIMPAC,RPAC,PLTORB,MOLPLT
>       |                     2=20=20
> Error: Global entity 'aimpac' at (1) cannot appear in a COMMON block at (=
2)
> parley.fppized.f:1118:23:
>=20

Without access to the source code, which was conveniently omitted,
it cannot no be determined if gfortran is correct.  The EBNF for COMMON
is

R873 common-stmt  is COMMON
                [ / [ common-block-name ] / ] common-block-object-list
                [ [ , ] / [ common-block-name ] /
                common-block-object-list ] ...

R874 common-block-object  is variable-name [ ( array-spec ) ]


AIMPAC is the name of a subroutine.  It is not a variable-name.
Unfortunately, there are 812 lines of missing code, so it is
not possible to tell if AIMPAC is declared in local scope to
something else, which blocks the global entity name.=