Re: autoconf-2.68: no AC_LANG_SOURCE call detected in body

[Eric Blake]

On 09/23/2010 07:52 AM, Eric Blake wrote:

[hit send too soon]

> On 09/23/2010 06:56 AM, Ralf Corsepius wrote:
> > Hi,
> >
> > I am facing a new issue/regression with autoconf-2.68:
>
> That is not a regression, but a feature. Reread NEWS:

** The macros AC_PREPROC_IFELSE, AC_COMPILE_IFELSE, AC_LINK_IFELSE, and
   AC_RUN_IFELSE now warn if the first argument failed to use
   AC_LANG_SOURCE or AC_LANG_PROGRAM to generate the conftest file
   contents.  A new macro AC_LANG_DEFINES_PROVIDED exists if you have
   a compelling reason why you cannot use AC_LANG_SOURCE but must
   avoid the warning.

> > AC_COMPILE_IFELSE([
> > #ifndef FOO
> > choke me
> > #endif
> > ])
>
> You should have used:
>
> AC_COMPILE_IFELSE([AC_LANG_SOURCE([
> #ifndef FOO
> choke me
> #endif
> ])

Needs another ]), to match the fact that there is an added ([ from the 
added call to AC_LANG_SOURCE.

--
Eric Blake   address@hidden    +1-801-349-2682
Libvirt virtualization library http://libvirt.org