Ralf Wildenhues wrote on 2006-03-03:
> the test is fine, but the build fails later:
>
> | xlc -DHAVE_CONFIG_H -DEXEEXT=\"\" -DEXEEXT=\"\"
> -DLIBDIR=\"/usr/local/lib\" -I. -I../../dummy-0/lib -I.. -D_THREAD_SAFE
> -g -c ../../dummy-0/lib/poll.c
> | "../../dummy-0/lib/poll.c", line 54.1: 1506-343 (S) Redeclaration of
> rpl_poll differs from previous declaration on line 119 of
> "/usr/include/sys/poll.h".
> | "../../dummy-0/lib/poll.c", line 54.1: 1506-381 (I) The type "void*" of
> parameter 1 in the prototype declaration is not compatible with the
> corresponding parameter type "struct pollfd*" in the nonprototype declaration.
>
> because /usr/include/poll.h exists and thus the replacement header is
> not added (earlier in gl_FUNC_POLL). The patch below adds it anyway in
> case we deem poll() inacceptable.
Thanks. I agree with you that AIX should be treated like MacOS X here.
(The bug on MacOS X led to very strange behaviour of GNU clisp on MacOS X
when stdin was redirected from a pipe; similar brokenness would likely
happen on AIX.)
With your patch in, the variable POLL_H is modified 37 lines after it has
already been AC_SUBSTed. To keep the macro maintainable, I rearrange it a bit.
Bruno
2006-04-23 Bruno Haible <[EMAIL PROTECTED]>
* poll.m4 (gl_FUNC_POLL): Rearrange code, so that POLL_H gets
assigned exactly once.
*** poll.m4.bak 2006-04-24 01:46:18.000000000 +0200
--- poll.m4 2006-04-24 01:57:49.000000000 +0200
***************
*** 8,19 ****
[
AC_CHECK_HEADERS(poll.h)
if test "$ac_cv_header_poll_h" = no; then
! POLL_H=poll.h
else
- POLL_H=
- fi
- AC_SUBST([POLL_H])
-
AC_CHECK_FUNC(poll,
[# Check whether poll() works on special files (like /dev/null) and
# and ttys (like /dev/tty). On MacOS X 10.4.0 and AIX 5.3, it doesn't.
--- 8,15 ----
[
AC_CHECK_HEADERS(poll.h)
if test "$ac_cv_header_poll_h" = no; then
! gl_cv_func_poll=no
else
AC_CHECK_FUNC(poll,
[# Check whether poll() works on special files (like /dev/null) and
# and ttys (like /dev/tty). On MacOS X 10.4.0 and AIX 5.3, it doesn't.
***************
*** 53,70 ****
This is MacOSX or AIX
#endif
], [gl_cv_func_poll=no], [gl_cv_func_poll=yes])])])
if test $gl_cv_func_poll = yes; then
AC_DEFINE([HAVE_POLL], 1,
[Define to 1 if you have the 'poll' function and it works.])
! fi
!
! if test $gl_cv_func_poll = no; then
! POLL_H=poll.h # Avoid differing declaration from a system header.
AC_LIBOBJ(poll)
AC_DEFINE(poll, rpl_poll,
[Define to poll if the replacement function should be used.])
gl_PREREQ_POLL
fi
])
# Prerequisites of lib/poll.c.
--- 49,67 ----
This is MacOSX or AIX
#endif
], [gl_cv_func_poll=no], [gl_cv_func_poll=yes])])])
+ fi
if test $gl_cv_func_poll = yes; then
+ POLL_H=
AC_DEFINE([HAVE_POLL], 1,
[Define to 1 if you have the 'poll' function and it works.])
! else
! POLL_H=poll.h
AC_LIBOBJ(poll)
AC_DEFINE(poll, rpl_poll,
[Define to poll if the replacement function should be used.])
gl_PREREQ_POLL
fi
+ AC_SUBST([POLL_H])
])
# Prerequisites of lib/poll.c.
