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
directory might differ from line-endings of the respective
files in the upstream repository.

1 files changed, 13 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/tc1/dr179.C b/gcc/testsuite/g++.dg/tc1/dr179.C
new file mode 100644
index 000000000..39e4164d2
--- /dev/null
+++ b/gcc/testsuite/g++.dg/tc1/dr179.C
@@ -0,0 +1,13 @@
+// { dg-do compile }
+// Origin: Giovanni Bajo <giovannibajo at gcc dot gnu dot org>
+// DR179: Function pointers and subtraction
+
+void foo(void);
+typedef void (*fp)(void);
+
+int main()
+{
+  fp f1 = foo;
+  fp f2 = foo;
+  (void)f2-f1;  // { dg-error "" "cannot subtract pointers to function" }
+}