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Re: no AC_LANG_SOURCE call detected in body with AC_RUN_IFELSE+AC_LANG_P

From: Eric Blake
Subject: Re: no AC_LANG_SOURCE call detected in body with AC_RUN_IFELSE+AC_LANG_PROGRAM
Date: Mon, 18 Apr 2011 07:10:23 -0600
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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_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:


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

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