Re: How to specify a library as dependecy to a executable

[ittium]

On Thu, Dec 15, 2011 at 10:31 PM, Stefano Lattarini <
address@hidden> wrote:

>  On Thursday 15 December 2011, ittium  wrote:
> > Group,
> > I have a Makefile.am which is building a executable. This executable
> > depends on certain libraries. I want to put these libraries as
> dependencies
> > to the executable so that when library got build, executable is also
> built
> > (if build from top level dir), I have many tried some option from net e.g
> > specifying "LIBRARY=" variable, none is working. Please let me know, how
> to
> > do this.
> > thanks
> > Ittium
> >
> Something like this should work:
>
>  lib_LIBRARIES = libfoo.a
>  bin_PROGRAMS = bar
>  bar_LDADD = libfoo.a
>
> or better again, in case your library is only useful to build your program
> and is not meant to be installed:
>
>  noinst_LIBRARIES = libfoo.a
>  bin_PROGRAMS = bar
>  bar_LDADD = libfoo.a
>
> For more information about the use of LDADD, see also:
>
>  <http://www.gnu.org/software/automake/manual/automake.html#Linking>
>
> HTH,
>  Stefano
>

thanks Stefano, I think, I could not explain the issue clearly. I have a
build system which build libraries followed by some binaries (libraries and
binaries reside in different directories), these binaries link with
libraries earlier built. If I change some source file in library, library
will be recompiled. What I want is when make file for executable find out
some library has changed, It should relink automatically on calling make.

bin_PROGRAMS=fooclient fooserver
fooclient_SOURCES=source/foo_client_main.cpp
fooserver_SOURCES=source/foo_server_main.cpp
INCLUDES=-I./include
fooclient_LDADD=-L$(ROOT_DIR)/protocol_handlers/net_handler
fooserver_LDADD=-L$(ROOT_DIR)/protocol_handlers/net_handler

In above case if any of the library mentioned in LDADD
(here libnet_handler.a) change, I want automatic relinking of binaries
assuming source files for binary have not changed