Re: how to install library in a specific directory?

[John Calcote]

On 7/22/2009 2:12 AM, bonami wrote:
>    I have two projects. One generates a shared library and the other uses it.
> The library is to be installed in /usr/local/lib/ezproject, while the
> project's name is ezcommon. I have problems in both the projects.
>    ezcommon's configure.ac,
> …
> AC_INIT(ezcommon, 3.0)
> AC_DISABLE_STATIC
> …
>    ezcommon's Makefile.am,
> lib_LTLIBRARIES = libezcommon.la
> libdir = $(exec_prefix)/lib/ezproject
> includedir = $(prefix)/include/ezproject
>    Problem is, if user configure --libdir=..., the user's definition will be
> ignored. How can I set libdir only when user does not assign it? (Since this
> dir name is not same as project name, I cannot use pkglib_.)
>    

mylibdir = $(libdir)/ezproject
mylib_LTLIBRARIES=libezcommon.la

myincludedir = $(includedir)/ezproject
myinclude_HEADERS = ...

>    The other question is how to check for this library in the other project,
> named ezcmd.
>    ezcmd's configure.ac,
> ...
> AC_CHECK_LIB([ezcommon], main,,AC_MSG_ERROR(...))
> ...
>    This check will fail, since ezcommon is installed in /usr/local/lib/
> ezproject by default. Should I add LDFLAGS=-Lezproject or sth.? And how? Or
> should I add this directory to system's link-search directory?
>    

If you put your libraries in a non-standard location, then you'll have 
to add that location to the library search path in one way or another. 
Either of the options you mention will work. One other option is to 
generate and install a pkgconfig description file, then use pkgconfig to 
locate the library.

Regards,
John