On 07/15/2016 12:47 PM, Jeffrey Walton wrote: > On Fri, Jul 15, 2016 at 2:35 PM, Bob Friesenhahn > <bfriesen@xxxxxxxxxxxxxxxxxxx> wrote: >> On Fri, 15 Jul 2016, Jeffrey Walton wrote: >>> >>> >>> Is there a preprocessor macro defined by Autotools to detect when >>> software is being configured by the tool? My apologies for asking; I >>> cannot simply run `g++ -dM -E - </dev/null` because it will lack >>> Autoconf specific defines. >> >> >> Everything that Autoconf defines should be visible in the generated >> config.log file. The source for each test case is included. > > Thanks. I'll have to ask the person for it. > > But getting back to Autoconf defines, is there a preprocessor define > that Autoconf uses to identify itself? Autoconf does not define anything specific. You can write an early AC_DEFINE in your configure.ac to trigger a specific witness used in all subsequent probes, but that's a per-package solution. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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