From mboxrd@z Thu Jan  1 00:00:00 1970
From: Adam Jiang <chaoj@infipwr.com>
Date: Thu, 25 Dec 2014 13:34:59 +0900
Subject: [Buildroot] AC_CHECK_LIB doesn't work for cross-compiling
Message-ID: <549B93F3.7020602@infipwr.com>
List-Id: <buildroot.busybox.net>
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To: buildroot@busybox.net

Hi,

I am trying to add a new package to buildroot. the package is built upon
autotools. thus, it is supposed to be very easy to make it
cross-compilable. ever, i got suck at AC_CHECK_LIB macro. it doesn't
work well at cross-compiling while it does work on normal compiling.

AC_CHECK_LIB([fcgi], [FCGX_InitRequest], [AC_MSG_WARN("unable to find
the FCGX_InitRequest() function")])

always failed even though I do have libfcgi in my configuration. The
error message looks like

checking for FCGX_InitRequest in -lfcgi... no
configure: WARNING: unable to find the FCGX_InitRequest() function

I don't think AC_CHECK_LIB will not work on cross-compiling because it
seems there are lots of other target packages in buildroot using the
macro. Most probably, I am doing something wrong.

Does AC_CHECK_LIB work in buildroot? If the macro needs some changes,
how could I do it?

Thanks,
/Adam