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| -rw-r--r-- | libbutl/builtin.cxx | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libbutl/builtin.cxx b/libbutl/builtin.cxx index f428194..67d0b3a 100644 --- a/libbutl/builtin.cxx +++ b/libbutl/builtin.cxx @@ -32,6 +32,10 @@ #include <libbutl/builtin-options.hxx> +// NOTE: don't forget to update build2::script::run_pipe() if adding a new +// builtin or changing any existing builtin, so that it now does/doesn't +// read from stdin and/or write to stdout. + // Strictly speaking a builtin which reads/writes from/to standard streams // must be asynchronous so that the caller can communicate with it through // pipes without being blocked on I/O operations. However, as an optimization, |