obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 100 insertions, 0 deletions

diff --git a/gcc/testsuite/gfortran.dg/global_references_1.f90 b/gcc/testsuite/gfortran.dg/global_references_1.f90
new file mode 100644
index 000000000..7e0a5bd0a
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/global_references_1.f90
@@ -0,0 +1,100 @@
+! { dg-do compile }
+! This program tests the patch for PRs 20881, 23308, 25538 & 25710
+! Assembled from PRs by Paul Thomas  <pault@gcc.gnu.org>
+module m
+contains
+  subroutine g(x)   ! Local entity
+    REAL :: x
+    x = 1.0
+  end subroutine g
+end module m
+! Error only appears once but testsuite associates with both lines.
+function f(x)       ! { dg-error "is already being used as a FUNCTION" }
+  REAL :: f, x
+  f = x
+end function f
+
+function g(x)       ! Global entity
+  REAL :: g, x
+  g = x
+
+! PR25710==========================================================
+! Lahey -2607-S: "SOURCE.F90", line 26: 
+! Function 'f' cannot be referenced as a subroutine. The previous
+! definition is in 'line 12'.
+
+  call f(g) ! { dg-error "is already being used as a FUNCTION" }
+end function g
+! Error only appears once but testsuite associates with both lines.
+function h(x)       ! { dg-error "is already being used as a FUNCTION" }
+  REAL :: h, x
+  h = x
+end function h
+
+SUBROUTINE TT()
+  CHARACTER(LEN=10), EXTERNAL :: j ! { dg-error "Return type mismatch" }
+  CHARACTER(LEN=10)          :: T
+! PR20881=========================================================== 
+! Error only appears once but testsuite associates with both lines.
+  T = j (1.0) ! { dg-error "is already being used as a SUBROUTINE" }
+  print *, T
+END SUBROUTINE TT
+
+  use m             ! Main program
+  real x
+  integer a(10)
+
+! PR23308===========================================================
+! Lahey - 2604-S: "SOURCE.F90", line 52:
+! The name 'foo' cannot be specified as both external procedure name
+! and common block name. The previous appearance is in 'line 68'.
+! Error only appears once but testsuite associates with both lines.
+  common /foo/ a    ! { dg-error "is already being used as a COMMON" }
+
+  call f (x)        ! OK - reference to local entity
+  call g (x)        !             -ditto-
+
+! PR25710===========================================================
+! Lahey - 2607-S: "SOURCE.F90", line 62:
+! Function 'h' cannot be referenced as a subroutine. The previous
+! definition is in 'line 29'.
+
+  call h (x) ! { dg-error "is already being used as a FUNCTION" }
+
+! PR23308===========================================================
+! Lahey - 2521-S: "SOURCE.F90", line 68: Intrinsic procedure name or
+! external procedure name same as common block name 'foo'.
+
+  call foo () ! { dg-error "is already being used as a COMMON" }
+
+contains
+  SUBROUTINE f (x)  ! Local entity
+    real x
+    x = 2
+  end SUBROUTINE f
+end
+
+! PR20881=========================================================== 
+! Lahey - 2636-S: "SOURCE.F90", line 81:
+! Subroutine 'j' is previously referenced as a function in 'line 39'.
+
+SUBROUTINE j (x)    ! { dg-error "is already being used as a SUBROUTINE" }
+  integer a(10)
+  common /bar/ a    ! Global entity foo
+  real x
+  x = bar(1.0)      ! OK for local procedure to have common block name
+contains
+  function bar (x)
+    real bar, x
+    bar = 2.0*x
+  end function bar
+END SUBROUTINE j
+
+! PR25538===========================================================
+! would ICE with entry and procedure having same names.
+  subroutine link2 (namef) ! { dg-error "is already being used as a SUBROUTINE" }
+    entry link2 (nameg)    ! { dg-error "is already being used as a SUBROUTINE" }
+    return
+  end
+
+! { dg-final { cleanup-modules "m" } }