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, 43 insertions, 0 deletions

diff --git a/gcc/testsuite/gfortran.dg/interface_28.f90 b/gcc/testsuite/gfortran.dg/interface_28.f90
new file mode 100644
index 000000000..42a8208f4
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/interface_28.f90
@@ -0,0 +1,43 @@
+! { dg-do compile }
+!
+! PR 36947: Attributes not fully checked comparing actual vs dummy procedure
+!
+! Original test case by Walter Spector <w6ws@earthlink.net>
+! Modified by Janus Weil <janus@gcc.gnu.org>
+
+module testsub
+  contains
+  subroutine test(sub)
+    interface
+      subroutine sub(x)
+        integer, intent(in), optional:: x
+      end subroutine
+    end interface
+    call sub()
+  end subroutine
+end module
+
+module sub
+  contains
+  subroutine subActual(x)
+    ! actual subroutine's argment is different in intent
+    integer, intent(inout),optional:: x
+  end subroutine
+  subroutine subActual2(x)
+    ! actual subroutine's argment is missing OPTIONAL
+    integer, intent(in):: x
+  end subroutine
+end module
+
+program interfaceCheck
+  use testsub
+  use sub
+
+  integer :: a
+
+  call test(subActual)  ! { dg-error "INTENT mismatch in argument" }
+  call test(subActual2)  ! { dg-error "OPTIONAL mismatch in argument" }
+end program
+
+! { dg-final { cleanup-modules "sub testsub" } }
+