Ken Moffat wrote:
> On Wed, May 30, 2012 at 04:55:40PM -0500, Bruce Dubbs wrote:
>> I'll try to create a dynamic udev library in my script.
OK, I was successful. It was a bit tricky. First, the order of what is
on the command line to link is significant.
Second, many of the programs are compiled with -fvisibility=hidden.
that isn't good for shared libraries because I got a lot of undefined
references. I just turned that off.
Now, the question is what to install and where to install it.
The standard seems to be:
/lib/libudev.so.0.13.1
/lib/libudev.so.0 -> libudev.so.0.13.1
/usr/lib/libudev.so -> ../../lib/libudev.so.0.13.1
/usr/include/libudev.h
/usr/lib/libudev.la
/usr/lib/pkgconfig/libudev.pc
The first four are easy.
The pc file isn't too bad:
prefix=/usr
exec_prefix=/usr
libdir=/usr/lib
includedir=/usr/include
Name: libudev
Description: Library to access udev device information
Version: 182
Libs: -L${libdir} -ludev -lrt
Libs.private:
Cflags: -I${includedir}
-------------
The libdir looks OK, because I think it's looking for libudev.so. I'm
not sure what prefix and exec_prefix mean in this context.
The .la file is:
# libudev.la - a libtool library file
# Generated by libtool (GNU libtool) 2.4.2
#
# Please DO NOT delete this file!
# It is necessary for linking the library.
# The name that we can dlopen(3).
dlname='libudev.so.0'
# Names of this library.
library_names='libudev.so.0.13.1 libudev.so.0 libudev.so'
# The name of the static archive.
old_library=''
# Linker flags that can not go in dependency_libs.
inherited_linker_flags=''
# Libraries that this one depends upon.
dependency_libs=' -lrt'
# Names of additional weak libraries provided by this library
weak_library_names=''
# Version information for libudev.
current=13
age=13
revision=1
# Is this an already installed library?
installed=yes
# Should we warn about portability when linking against -modules?
shouldnotlink=no
# Files to dlopen/dlpreopen
dlopen=''
dlpreopen=''
# Directory that this library needs to be installed in:
libdir='/usr/lib'
---------
Actually, in this case the file is NOT generated by libtool, but it
looks OK. I think the libdir is the same as the pc file in that it is
looking for libudev.so.0.
I'll add these to the install.sh script. I'll send a message, probably
in a couple of hours about the new patch being available on
www.linuxfromscratch.org.
-- Bruce
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