Do not force C++11 mode

pocl.spec

@@ -4,7 +4,7 @@
 Name:           pocl
 %global ver 1.5
 Version:        %{lua:ver = string.gsub(rpm.expand("%{ver}"), "-", "~"); print(string.lower(ver))}
-Release:        7%{?dist}
+Release:        8%{?dist}
 Summary:        Portable Computing Language - an OpenCL implementation
 # The whole code is under MIT
 # except include/utlist.h which is under BSD (and unbundled) and
@@ -75,7 +75,7 @@ find . -depth -name utlist* -print -delete
 %cmake .. \
     -DENABLE_ICD=1 \
     -DPOCL_INSTALL_ICD_VENDORDIR=%{_sysconfdir}/OpenCL/vendors \
-    -DEXTRA_KERNEL_CXX_FLAGS="%{optflags} -std=c++11" \
+    -DEXTRA_KERNEL_CXX_FLAGS="%{optflags}" \
 %ifarch %{ix86} x86_64
     -DKERNELLIB_HOST_CPU_VARIANTS=distro \
 %endif
@@ -123,6 +123,9 @@ find . -depth -name utlist* -print -delete
 %{_libdir}/pkgconfig/%{name}.pc
 
 %changelog
+* Wed Aug 26 2020 Jeff Law <law@redhat.com> - 1.5-8
+- Do not force C++11 mode
+
 * Tue Aug 11 2020 Tom Stellard <tstellar@redhat.com> - 1.5-7
 - Rebuild for LLVM11