[boost] How do I change template-depth for the qcc toolset so that the accumulator tests pass

The accumulators/test/weighted_tail_variate_means test fails with "template instantiation depth exceeds maximum of 100" with the qcc toolset. I've tried to increase the depth by editing tools/build/v2/tools/qcc.jam so that it's like gcc.jam which has a default depth of 128 but the compiler is still called with -Wc,-ftemplate-depth-100. How do I change the default depth? I've tried the attached patch which makes that section of the file equal to gcc.jam but it doesn't work. I also tried leaving the $(1) which I have no idea what it does but the result was the same. Regards Niklas Angare