On Wed, May 30, 2012 at 06:50:07PM -0500, Bruce Dubbs wrote:
> 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
libudev.so.1.0.0 for 183
> /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
and 183
> 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.
>
On my 182 they are both /usr like in yours, and that seems to work
fine.
> 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'
>
again, those are 182
> # 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
so are these
>
> # 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'
>
> ---------
I'll attach libudev.la from a successful 183 DESTDIR install
install so you can confirm the differences.
Mine went into /usr/lib. Are any of your programs, such as
cdrom_id, linking to this ? If so, it probably needs to be in /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
Anyone know if *anything* uses /usr/share/pkgconfig/udev.pc ?
ĸen
--
das eine Mal als Tragödie, das andere Mal als Farce
# 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.1'
# Names of this library.
library_names='libudev.so.1.0.0 libudev.so.1 libudev.so'
# The name of the static archive.
old_library='libudev.a'
# Linker flags that can not go in dependency_libs.
inherited_linker_flags=''
# Libraries that this one depends upon.
dependency_libs=' -ldl -lrt'
# Names of additional weak libraries provided by this library
weak_library_names=''
# Version information for libudev.
current=1
age=0
revision=0
# 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'
--
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