GNU ed signal handling problem

[Claudio Fontana]

I have written a temporary solution for the signal
handling problem in ed 0.2.
The current configure.in does 

AC_CHECK_FUNCS(sigsetjmp)

but the sigsetjmp function is misteriously not found,
and the HAVE_SIGSETJMP macro is not defined as a
consequence.
(Someone can explain?)

Doing

AC_CHECK_FUNCS(siglongjmp)

which looks pretty equivalent to me for the scope of
checking whether sigsetjmp/siglongjmp pair can be
used, works.

There is also a problem with LIBOBJ vs AC_LIBOBJ,
which I ignored since I have not enough autoconf
knowledge to fix it the right way.

Replacing HAVE_SIGSETJMP with HAVE_SIGLONGJMP
throughout the code solves the signal problem under
GNU/Linux for the time being. It requires autoconf to
be run prior to ./configure of course.

I attach the unified diffs. Maybe someone with more
autotools knowledge can work on these to produce
something better.

Claudio



                
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configure.in.diff
Description: configure.in.diff

main.c.diff
Description: main.c.diff

signal.c.diff
Description: signal.c.diff