On Thu Jun 25, 2015 at 15:37:38 -0400, Yuxin Ren wrote:
I find in the src/l4/pkg directory, there are some libraries -- libgcc, libstdc++-v3, and libsupc++. But in those libraries, I just found very little source code. Instead, they include many makefiles.
Where is the source code of those libraries? And why are there those makefiles?
For libgcc there isn't any more source code because the package is only exchanging some functionality in the libgcc provided by the used compiler, and that only on ARM. libsupc++ is part of libstdc++-v3, so the source code is taken from there. libstdc++-v3 has all the source code related to libstdc++ which is also used by e.g. libstdc++-headers. This is separated for build dependency as well as for runtime dependency reasons. For example there are two libc versions, one with L4-knowledge/multi-threading and one without. While you probably want to have pthread and friends in your application, multi-threading functionality (or even L4 functionality) functionality isn't available in boot-up code.
Adam