[yocto] Boost - undefined references when linking

I've got an autotools project which uses 'boost'. All was working great until I added some code which uses additional boost functionality. I'm now getting the following undefined references reported: | File.o: In function `thread_exception': |

[yocto] Boost - undefined references when linking

I've got an autotools project which uses 'boost'. All was working great until I added some code which uses additional boost functionality. I'm now getting the following undefined references reported: | File.o: In function `thread_exception': |