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* [gcc r14-5859] Fortran: avoid obsolescence warning for COMMON with submodule [PR111880]
@ 2023-11-26 19:20 Harald Anlauf
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From: Harald Anlauf @ 2023-11-26 19:20 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:c9d029ba2ceb435e31492c1f3f0fd3edf0e386be
commit r14-5859-gc9d029ba2ceb435e31492c1f3f0fd3edf0e386be
Author: Harald Anlauf <anlauf@gmx.de>
Date: Thu Nov 23 22:48:38 2023 +0100
Fortran: avoid obsolescence warning for COMMON with submodule [PR111880]
gcc/fortran/ChangeLog:
PR fortran/111880
* resolve.cc (resolve_common_vars): Do not call gfc_add_in_common
for symbols that are USE associated or used in a submodule.
gcc/testsuite/ChangeLog:
PR fortran/111880
* gfortran.dg/pr111880.f90: New test.
Diff:
---
gcc/fortran/resolve.cc | 4 ++--
gcc/testsuite/gfortran.dg/pr111880.f90 | 22 ++++++++++++++++++++++
2 files changed, 24 insertions(+), 2 deletions(-)
diff --git a/gcc/fortran/resolve.cc b/gcc/fortran/resolve.cc
index 81a14653a04..166b702cd9a 100644
--- a/gcc/fortran/resolve.cc
+++ b/gcc/fortran/resolve.cc
@@ -986,8 +986,8 @@ resolve_common_vars (gfc_common_head *common_block, bool named_common)
/* gfc_add_in_common may have been called before, but the reported errors
have been ignored to continue parsing.
- We do the checks again here. */
- if (!csym->attr.use_assoc)
+ We do the checks again here, unless the symbol is USE associated. */
+ if (!csym->attr.use_assoc && !csym->attr.used_in_submodule)
{
gfc_add_in_common (&csym->attr, csym->name, &common_block->where);
gfc_notify_std (GFC_STD_F2018_OBS, "COMMON block at %L",
diff --git a/gcc/testsuite/gfortran.dg/pr111880.f90 b/gcc/testsuite/gfortran.dg/pr111880.f90
new file mode 100644
index 00000000000..c0cd98a93d4
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr111880.f90
@@ -0,0 +1,22 @@
+! { dg-do compile }
+! { dg-options "-std=f2018" }
+! PR fortran/111880 - redundant warning of obsolescent COMMON with submodule
+
+module third_party_module
+ integer :: some_param
+ common /not_my_code/ some_param ! { dg-warning "COMMON block" }
+end module third_party_module
+
+module foo
+ use third_party_module
+ interface
+ module subroutine bar()
+ end subroutine bar
+ end interface
+end module foo
+
+submodule (foo) foo_submod ! We do not need a warning here!
+contains
+ module procedure bar
+ end procedure bar
+end submodule foo_submod
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