7 May
2015
7 May
'15
5:08 p.m.
The original question suggested that if a tester changed the jam file so that the switch gcc visibility=hidden was enabled then tests would pass. My point is that his is very unlikely which is why it isn't being done. If visibility=hidden is to be supported (and I think it should be) library source code will have to be updated.
It's a simplistic case, but the Math/TR1 library is built with -fvisibility-hidden with both GCC and Intel C++ John.