From: Brandon Casey <brandon.casey.ctr@nrlssc.navy.mil>
Date: Tue, 21 Jul 2009 15:12:31 GMT
Subject: Re: [PATCH] configure: use AC_SEARCH_LIBS instead of AC_CHECK_LIB
Message-ID: <ROnxPc_FlcxpQoCOZcOfoalyiRYK1R7qCAowbfiQsNLLI8qrrtJEUw@cipher.nrlssc.navy.mil>
In-Reply-To: <6WnEB0at_uuAu9kicWjrHLsBbTv58WtCNOANkKzk-SqTgqjuWyh8WA@cipher.nrlssc.navy.mil>

Brandon Casey wrote:
> A question about AC_SEARCH_LIBS:
> 
> With AC_SEARCH_LIBS, which of [action-if-found] or [action-if-not-found]
> is executed if the function is found in the standard c library i.e. "calling
> `AC_LINK_IFELSE([AC_LANG_CALL([], [function])])' first with no libraries"?

btw, the "`AC_LINK_IFELSE(..." line is from the autoconf documentation.  It is
the first thing that AC_SEARCH_LIBS does.  It tries to link without any of the
specified libraries first, then it iterates trying to link using each specified
library, stopping when it is successful.

If you didn't recognize that that line was from the documentation, it may be
confusing.

-brandon