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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/96486] get_environment_variable fails for zero-length
 values
Date: Fri, 07 Aug 2020 03:02:23 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96486

--- Comment #18 from kargl at gcc dot gnu.org ---
Created attachment 49015
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D49015&action=3Dedit
Bring get_environment_variable almost to F2018 conformance

* check.c (gfc_check_get_environment_variable):  New function.  Implement
  checking for get_environment_variable.

* gfortran.h: Add member for 6-argument subroutine to gfc_check_f.

* intrinsic.c (do_check): Deal with 6-argument subroutine checking.
  (add_sym_6s): Add 6-argument subroutine to subroutine list.
  (add_subroutines): Use add_sym_6s to add get_envronment_variable.

* intrinsic.h: Prototype for gfc_check_get_environment_variable.

* libgfortran/intrinsics/env.c:
  . Add F2018 errmsg variable.
  . Remove runtime error for missing name variable.  This is caught in
    check.c.=