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* [gcc r13-4809] Fortran: a C interoperable function cannot have the CLASS attribute [PR95375]
@ 2022-12-20 21:24 Harald Anlauf
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From: Harald Anlauf @ 2022-12-20 21:24 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:aed5584ff6891560dc567e54517b9722dadc503e
commit r13-4809-gaed5584ff6891560dc567e54517b9722dadc503e
Author: Harald Anlauf <anlauf@gmx.de>
Date: Tue Dec 20 21:17:08 2022 +0100
Fortran: a C interoperable function cannot have the CLASS attribute [PR95375]
gcc/fortran/ChangeLog:
PR fortran/95375
* decl.cc (verify_bind_c_sym): Extend interoperability check to
CLASS variables.
gcc/testsuite/ChangeLog:
PR fortran/95375
* gfortran.dg/bind_c_procs_4.f90: New test.
Diff:
---
gcc/fortran/decl.cc | 12 ++++++++----
gcc/testsuite/gfortran.dg/bind_c_procs_4.f90 | 17 +++++++++++++++++
2 files changed, 25 insertions(+), 4 deletions(-)
diff --git a/gcc/fortran/decl.cc b/gcc/fortran/decl.cc
index 1562dc22bc6..e593518a77e 100644
--- a/gcc/fortran/decl.cc
+++ b/gcc/fortran/decl.cc
@@ -5998,10 +5998,14 @@ verify_bind_c_sym (gfc_symbol *tmp_sym, gfc_typespec *ts,
}
else
{
- if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED)
- gfc_error ("Type declaration %qs at %L is not C "
- "interoperable but it is BIND(C)",
- tmp_sym->name, &(tmp_sym->declared_at));
+ if (tmp_sym->ts.type == BT_DERIVED || ts->type == BT_DERIVED
+ || tmp_sym->ts.type == BT_CLASS || ts->type == BT_CLASS)
+ {
+ gfc_error ("Type declaration %qs at %L is not C "
+ "interoperable but it is BIND(C)",
+ tmp_sym->name, &(tmp_sym->declared_at));
+ retval = false;
+ }
else if (warn_c_binding_type)
gfc_warning (OPT_Wc_binding_type, "Variable %qs at %L "
"may not be a C interoperable "
diff --git a/gcc/testsuite/gfortran.dg/bind_c_procs_4.f90 b/gcc/testsuite/gfortran.dg/bind_c_procs_4.f90
new file mode 100644
index 00000000000..407d8bb9afc
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/bind_c_procs_4.f90
@@ -0,0 +1,17 @@
+! { dg-do compile }
+! PR fortran/95375 - ICE in add_use_op
+! Contributed by G.Steinmetz
+
+function f() result(n) bind(c) ! { dg-error "not C interoperable" }
+ class(*), allocatable :: n
+end
+program p
+ interface
+ function f() result(n) bind(c)
+ integer :: n
+ end
+ end interface
+ if ( f() /= 0 ) stop
+end
+
+! { dg-prune-output "Type mismatch" }
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