symbols if appropriate. For example, error.h will use it to hide
declarations that should not be seen by external builtins such as printf.
* The shell's outfmt() function returns void, but the standard fprintf()
function returns int. Similarly for several other functions that are
redefined via macros in bltin.h. Add a _RETURN_INT macro to do the
necessary conversion.
* Delete some declarations that appear in error.h.
* Add comments on some #else/#endif lines.
d6d9ccc8ad