Add some qthreads patches

var/spack/repos/builtin/packages/qthreads/ldflags.patch

@@ -0,0 +1,11 @@
+--- a/configure
++++ b/configure
+@@ -40456,7 +40456,7 @@
+   hwloc_saved_LDFLAGS="$LDFLAGS"
+   if test "x$with_hwloc" != x; then
+   CPPFLAGS="-I$with_hwloc/include $CPPFLAGS"
+-		 LDFLAGS="-L$with_hwloc/lib $CPPFLAGS"
++		 LDFLAGS="-L$with_hwloc/lib $LDFLAGS"
+ fi
+   
+   

var/spack/repos/builtin/packages/qthreads/package.py

@@ -16,7 +16,12 @@ class Qthreads(Package):
 
     version('1.10', '5af8c8bbe88c2a6d45361643780d1671')
 
+    patch("ldflags.patch")
+    patch("restrict.patch")
+    patch("trap.patch")
+
     def install(self, spec, prefix):
-        configure("--prefix=%s" % prefix)
+        configure("--prefix=%s" % prefix,
+                  "--enable-guard-pages")
         make()
         make("install")

var/spack/repos/builtin/packages/qthreads/restrict.patch

@@ -0,0 +1,12 @@
+--- a/include/qthread/common.h.in
++++ b/include/qthread/common.h.in
+@@ -84,7 +84,9 @@
+ /* Define to the equivalent of the C99 'restrict' keyword, or to
+    nothing if this is not supported.  Do not define if restrict is
+    supported directly.  */
++#ifndef restrict
+ #undef restrict
++#endif
+ /* Work around a bug in Sun C++: it does not support _Restrict or
+    __restrict__, even though the corresponding Sun C compiler ends up with
+    "#define restrict _Restrict" or "#define restrict __restrict__" in the

var/spack/repos/builtin/packages/qthreads/trap.patch

@@ -0,0 +1,11 @@
+--- a/include/qthread/qthread.hpp
++++ b/include/qthread/qthread.hpp
+@@ -236,7 +236,7 @@
+             return qthread_incr64((uint64_t *)operand, incr);
+ 
+         default:
+-            *(int *)(0) = 0;
++            __builtin_trap();
+     }
+     return T(0);                       // never hit - keep compiler happy
+ }