diff options
Diffstat (limited to 'gcc/fortran/decl.c')
| -rw-r--r-- | gcc/fortran/decl.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/gcc/fortran/decl.c b/gcc/fortran/decl.c index 67e8ef7..00241b8 100644 --- a/gcc/fortran/decl.c +++ b/gcc/fortran/decl.c @@ -838,7 +838,24 @@ verify_c_interop_param (gfc_symbol *sym) sym->name, &(sym->declared_at), sym->ns->proc_name->name); } - + + /* Character strings are only C interoperable if they have a + length of 1. */ + if (sym->ts.type == BT_CHARACTER) + { + gfc_charlen *cl = sym->ts.cl; + if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT + || mpz_cmp_si (cl->length->value.integer, 1) != 0) + { + gfc_error ("Character argument '%s' at %L " + "must be length 1 because " + "procedure '%s' is BIND(C)", + sym->name, &sym->declared_at, + sym->ns->proc_name->name); + retval = FAILURE; + } + } + /* We have to make sure that any param to a bind(c) routine does not have the allocatable, pointer, or optional attributes, according to J3/04-007, section 5.1. */ |