Re: confdefs.h not being included by AC_LANG_SOURCE()

[Ralf Wildenhues]

* Ralf Wildenhues wrote on Sat, Feb 20, 2010 at 10:57:04AM CET:
> * Brian J. Murrell wrote on Thu, Feb 18, 2010 at 07:15:08PM CET:
> > I am finding that the use of AC_LANG_SOURCE() is having different
> > results on autoconf 2.64 vs. 2.59.  On 2.59 it seems to have been
> > including confdefs.h into generate programs but in 2.64 this seems to no
> > longer be the case.
> 
> Looks like a regression to me, from v2.63-153-g8e27cc7.

Wait a moment.  I can't reproduce this.  The following example works
right for me with both git master and 2.64, the expanded code contains
something like
  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
  /* end confdefs.h.  */
  #ifndef PACKAGE_NAME
  choke me
  #endif
  [...]

and it also works when I replace AC_PROG_CC with AC_PROG_CXX and
AC_LANG([C++]).  Any chance your configure.ac messes with AC_LANG in a
way that the language ends up being something other than C or C++?
Can you post a small but full reproducible example?

Thanks,
Ralf

--- snip configure.ac ---
AC_INIT([pkg], [1.0])

AC_PROG_CC
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifndef PACKAGE_NAME
choke me
#endif
int main ()
{
  return 0;
}
]], [], [AC_MSG_FAILURE([confdefs not included])])])
--- snip ---