On Tue, Feb 22, 2011 at 01:06:01AM +0000, Jonathan Wakely wrote: > > We're rebuilding now with a modified g++spec.c (patched to reorder > > -lpthread after -lstdc++), but still not sure that is the correct fix > > for this. > > The reason I asked is that on most platforms -pthread does two things, > it uses -D_REENTRANT when compiling (technically when preprocessing) > and uses -lpthread when linking. On some platforms doing one without > the other is not supported, so you should use -pthread when compiling > and when linking. While I agree with all of this, adding -lpthread to the link line as well as -pthread should not cause the resulting application to crash. I see I never got to that in my original mail, sorry :(. Even if we consistently use -pthread for compiling and linking with gcc, we sometimes end up with a -lpthread on the link line (often because libtool has it in some .la files dependency_libs, sometimes due to pkgconfig), and when that happens the resulting application crashes at launch. Peter -- Peter O'Gorman pogma@xxxxxxxxxxxxxxxxxx
