Played around with the warning in the 'omp_lib' module (needs tweaking
as for the current version, no warning is done). Turned out that already
use omp_lib
outputs a warning even when not used.
That's fixed by the attached patch - even if the location is not perfect.
OK for GCC 12 + GCC 11 backport?
Tobias
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Fortran: Fix deprecate warning with parameter
gcc/fortran/ChangeLog:
* resolve.c (resolve_values): Only show
deprecated warning if attr.referenced.
gcc/testsuite/ChangeLog:
* gfortran.dg/attr_deprecated-2.f90: New test.
diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
index 511fe3a5e55..0d0af39d23f 100644
--- a/gcc/fortran/resolve.c
+++ b/gcc/fortran/resolve.c
@@ -12351,7 +12351,7 @@ resolve_values (gfc_symbol *sym)
if (sym->value == NULL)
return;
- if (sym->attr.ext_attr & (1 << EXT_ATTR_DEPRECATED))
+ if (sym->attr.ext_attr & (1 << EXT_ATTR_DEPRECATED) && sym->attr.referenced)
gfc_warning (OPT_Wdeprecated_declarations,
"Using parameter %qs declared at %L is deprecated",
sym->name, &sym->declared_at);
diff --git a/gcc/testsuite/gfortran.dg/attr_deprecated-2.f90 b/gcc/testsuite/gfortran.dg/attr_deprecated-2.f90
new file mode 100644
index 00000000000..97a365a7c4a
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/attr_deprecated-2.f90
@@ -0,0 +1,22 @@
+! { dg-do compile }
+! { dg-additional-options "-Wall" }
+!
+! Ensure that only those parameters are warned for which are actually used
+!
+module m
+ implicit none
+ integer, parameter :: parm = 4 ! unused
+ integer, parameter :: parm2 = 4 ! used in the main program
+ integer, parameter :: parm3 = 4 ! used in "f()" - { dg-warning "Using parameter 'parm3' declared at .1. is deprecated" }
+ integer, save :: var, var2
+!GCC$ ATTRIBUTES DEPRECATED :: parm, parm2, parm3, var, var2
+contains
+ subroutine f()
+ print *, parm3 ! warning shown above
+ end
+end module m
+
+use m ! { dg-warning "Using parameter 'parm2' declared at .1. is deprecated" }
+implicit none
+print *, var2, parm2 ! { dg-warning "Using variable 'var2' at .1. is deprecated" }
+end
