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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
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