what to do if a function is in a library?

[Sam Steingold]

This comes from AC_PATH_XTRA:

checking for gethostbyname... no
checking for gethostbyname in -lnsl... yes

the result of this is that ac_cv_func_connect=no and HAVE_GETHOSTBYNAME
is undefined.
However, since -lnsl is actually added to LIBS at some point,
gethostbyname() is present and available.
So, how do I make sure that autoconf knows that gethostbyname really is
there?

Alas, adding

test X$ac_cv_lib_socket_connect = Xyes && ac_cv_func_connect=yes
test X$ac_cv_lib_nsl_gethostbyname = Xyes && ac_cv_func_gethostbyname=yes
test X$ac_cv_lib_bsd_gethostbyname = Xyes && ac_cv_func_gethostbyname=yes

after AC_PATH_XTRA in configure.in is no good because HAVE_GETHOSTBYNAME
is not defined.

I guess I could do

undef ac_cv_func_connect
cl_save_LIBS=$LIBS
test x$LIBSOCKET = x || LIBS="$LIBS $LIBSOCKET"
AC_CHECK_FUNCS(connect)
LIBS=$cl_save_LIBS

(I have gl_SOCKETS in gl_INIT).
Is that TRT?

Thanks

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Sam Steingold (http://sds.podval.org/) on CentOS release 5.6 (Final) X 
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