here it stops, when i try to compile Gem from git:
which compiler (gcc-version) is this?
gcc --version gcc (GCC) 4.7.0 20120324 (prerelease)
i pushed a change to Files.cpp that would include<unistd.h>, maybe this fixes the problem. please check (and tell us of success/failure)
Files.cpp problem dissapeared, but it seems that the same problem is in plugins/recordV4L2/recordV4L2.cpp i tried to include unistd.h and then it was ok