platforms:
AIX 5.1, OSF/1 5.1.
@item
-When this function fails, it returns -1 and sets @code{errno}, instead of
+When this function fails, it returns @minus{}1 and sets @code{errno}, instead of
returning the error number, on some platforms:
glibc 2.12 with @code{-D_POSIX_C_SOURCE=200112L}, AIX 6.1, OSF/1 5.1.
@item