A related problem I just noticed: sysconf(3) says | For options, typically, there is a constant | .B _POSIX_FOO | that may be defined in | .IR <unistd.h> . | If it is undefined, one should ask at run time. | If it is defined to \-1, then the option is not supported. But according to <http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html#tag_13_77_03_02>, undefined is the same as defined to -1: "If a symbolic constant is not defined or is defined with the value -1, the option is not supported for compilation." zw -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
