Successfully attached to hung "make -j2" process!

[Jonathan Kamens]

I should probably have mentioned, in the description of the Make job
server, how it is that child Make processes have access to the job
server pipe, since that may be relevant.  If the job server is active,
all child Make processes get passed the command-line argument
"--jobserver-fds #,#" where "#,#" are the numbers of the file
descriptors at both ends of the pipe.  These file descriptors aren't
supposed to close on exec, so the child Make processes can access
them.

  jik