re PR fortran/33215 (Bind(C): Bugs with empty "name=": Creates wrong result and accepts invalid)

2007-08-29  Christopher D. Rickett  <crickett@lanl.gov>

	PR fortran/33215
	* decl.c (build_sym): Pass number of identifiers on line to
	set_binding_label.
	(set_binding_label): Verify that only one identifier given if
	NAME= specified, even if the given binding label has zero length.
	(gfc_match_bind_c): Remove declaration for has_name_equals because
	it hides the static global one that is needed.

2007-08-29  Christopher D. Rickett  <crickett@lanl.gov>

	PR fortran/33215
	* gfortran.dg/binding_label_tests_15.f03: New test case.
	* gfortran.dg/binding_label_tests_16.f03: Ditto.

From-SVN: r127898

gcc/fortran/ChangeLog

+2007-08-28  Christopher D. Rickett  <crickett@lanl.gov>
+
+	PR fortran/33215
+	* decl.c (build_sym): Pass number of identifiers on line to
+	set_binding_label.
+	(set_binding_label): Verify that only one identifier given if
+	NAME= specified, even if the given binding label has zero length.
+	(gfc_match_bind_c): Remove declaration for has_name_equals because
+	it hides the static global one that is needed.
+
 2007-08-29  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
 
 	* trans-array.c (gfc_grow_array): Use gfc_call_realloc.

gcc/fortran/decl.c

@@ -980,9 +980,10 @@ build_sym (const char *name, gfc_charlen *cl,
     {
       if (sym->binding_label[0] == '\0')
         {
-          /* Here, we're not checking the numIdents (the last param).
-             This could be an error we're letting slip through!  */
-          if (set_binding_label (sym->binding_label, sym->name, 1) == FAILURE)
+	  /* Set the binding label and verify that if a NAME= was specified
+	     then only one identifier was in the entity-decl-list.  */
+	  if (set_binding_label (sym->binding_label, sym->name,
+				 num_idents_on_line) == FAILURE)
             return FAILURE;
         }
     }
@@ -2847,15 +2848,15 @@ cleanup:
 try
 set_binding_label (char *dest_label, const char *sym_name, int num_idents)
 {
-  if (curr_binding_label[0] != '\0')
+  if (num_idents > 1 && has_name_equals)
     {
-      if (num_idents > 1 || num_idents_on_line > 1)
-        {
-          gfc_error ("Multiple identifiers provided with "
-                     "single NAME= specifier at %C");
-          return FAILURE;
-        }
+      gfc_error ("Multiple identifiers provided with "
+		 "single NAME= specifier at %C");
+      return FAILURE;
+    }
 
+  if (curr_binding_label[0] != '\0')
+    {
       /* Binding label given; store in temp holder til have sym.  */
       strncpy (dest_label, curr_binding_label,
                strlen (curr_binding_label) + 1);
@@ -4084,7 +4085,6 @@ gfc_match_bind_c (gfc_symbol *sym)
   char binding_label[GFC_MAX_SYMBOL_LEN + 1];
   match double_quote;
   match single_quote;
-  int has_name_equals = 0;
 
   /* Initialize the flag that specifies whether we encountered a NAME= 
      specifier or not.  */

gcc/testsuite/ChangeLog

+2007-08-29  Christopher D. Rickett  <crickett@lanl.gov>
+
+	PR fortran/33215
+	* gfortran.dg/binding_label_tests_15.f03: New test case.
+	* gfortran.dg/binding_label_tests_16.f03: Ditto.
+
 2007-08-29  Francois-Xavier Coudert  <fxcoudert@gcc.gnu.org>
 
 	* gfortran.dg/alloc_comp_basics_1.f90: Update check.
@@ -61,7 +67,7 @@
 	PR c++/32596
 	* g++.dg/ext/visibility/anon5.C: New test.
 
-2007-07-28  Dominique d'Humieres  <dominiq@lps.ens.fr>
+2007-08-28  Dominique d'Humieres  <dominiq@lps.ens.fr>
 
 	* gfortran.dg/gamma_4.f90: Fix large-real kind selection.
 

gcc/testsuite/gfortran.dg/binding_label_tests_15.f03

+! { dg-do compile }
+! Verify that an error is correctly reported if multiple identifiers are given
+! with a bind(c) statement that has a NAME= specifier.
+module m
+  use iso_c_binding
+  implicit none
+  integer(c_int), bind(C, name="") :: a,b ! { dg-error "Multiple identifiers" }
+  integer(c_int), bind(C, name="bob") :: c,d ! { dg-error "Multiple identifiers" }
+  integer(c_int) :: e,f 
+  bind(c, name="foo") :: e,f ! { dg-error "Multiple identifiers" }
+end module m
+

gcc/testsuite/gfortran.dg/binding_label_tests_16.f03

+! { dg-do run }
+! Verify that the variables 'a' in both modules don't collide.
+module m
+  use iso_c_binding
+  implicit none
+  integer(c_int), save, bind(C, name="") :: a = 5
+end module m
+
+module n
+  use iso_c_binding
+  implicit none
+  integer(c_int), save, bind(C,name="") :: a = -5
+end module n
+
+program prog
+use m
+use n, b=>a
+implicit none
+  print *, a, b
+  if (a /= 5 .or. b /= -5) call abort()
+end program prog
+! { dg-final { cleanup-modules "m n" } }