Ok, alguém sabe porque é que na info page de abort() diz que não se podem revelar mais informações por causa de censura federal?

http://www.gnu.org/software/libtool/manual/libc/Aborting-a-Program.html

estás a ser irónico, certo?

Não!
É mesmo verdade (que está lá escrito isso...)

Isso é uma graçola sobre a regulação do aborto nos EUA.
Aqui não tens isso:

$ info abort
File: *manpages*, Node: abort, Up: (dir)

ABORT(3) Linux Programmer's Manual ABORT(3)

NAME
abort - cause abnormal process termination

SYNOPSIS
#include <stdlib.h>

void abort(void);

DESCRIPTION
The abort() first unblocks the SIGABRT signal, and then raises that
signal for the calling process. This results in the abnormal termina-
tion of the process unless the SIGABRT signal is caught and the signal
handler does not return (see longjmp(3)).

If the abort() function causes process termination, all open streams
are closed and flushed.

If the SIGABRT signal is ignored, or caught by a handler that returns,
the abort() function will still terminate the process. It does this by
restoring the default disposition for SIGABRT and then raising the sig-
nal for a second time.

RETURN VALUE
The abort() function never returns.

CONFORMING TO
SVr4, POSIX.1-2001, 4.3BSD, C89, C99

SEE ALSO
gdb(1), sigaction(2), exit(3), longjmp(3), raise(3)

COLOPHON
This page is part of release 2.79 of the Linux man-pages project. A
description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.

GNU 2007-12-15 ABORT(3)

Ok...
Por acaso eu disse que era na info de abort, mas afinal é da libc, na secção de abortar um programa... Pormenores...