Whether
.BR getpagesize ()
is present as a Linux system call depends on the architecture.
-If it is, it returns the kernel symbol PAGE_SIZE,
+If it is, it returns the kernel symbol
+.BR PAGE_SIZE ,
which is architecture and machine model dependent.
Generally, one uses binaries that are architecture but not
machine model dependent, in order to have a single binary
distribution per architecture.
This means that a user program
-should not find PAGE_SIZE at compile time from a header file,
+should not find
+.B PAGE_SIZE
+at compile time from a header file,
but use an actual system call, at least for those architectures
(like sun4) where this dependency exists.
Here libc4, libc5, glibc 2.0 fail because their