On 04/18/2011 05:55 AM, Vincent Lefevre wrote: > Hi, > > On a Debian/sid machine, with the following configure.ac > > AC_INIT([Test], [1.0]) > AC_RUN_IFELSE(AC_LANG_PROGRAM([[ ]], [[ ]]), > [AC_MSG_RESULT(yes)], [AC_MSG_RESULT(no)], [AC_MSG_RESULT(can not test)]) > > autoconf version 2.68 gives: > > configure.ac:2: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in > body
Use correct quoting: AC_RUN_IFELSE([AC_LANG_PROGRAM([[ ]], [[ ]])], [AC_MSG_RESULT...]) > So, I don't see anything wrong with the above example. You weren't quoting the AC_LANG_PROGRAM invocation. > > but since the example uses AC_LANG_PROGRAM, this should be OK. You didn't use it quoted. Therefore, the macro expanded too early, and if it expands to anything that contains a comma, then AC_RUN_IFELSE will be operating on the wrong data. -- Eric Blake ebl...@redhat.com +1-801-349-2682 Libvirt virtualization library http://libvirt.org
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