Re: ld cannot find X11 libs

[Khem Raj <khem at mvista dot com>]

EJS wrote:
> Hi all,
>
> I am not sure that this is a cross compiling issue,
> but if it isn't hopefully someone can point me in the
> right direction.
>
> I have an application that I am trying to cross
> compile, source: i686-cygwin
> target:i686-unknown-linux.
> BINUTILS_DIR=binutils-2.15
> GCC_DIR=gcc-3.4.4
> GLIBC_DIR=glibc-2.3.5
> LINUX_DIR=linux-2.6.8
> LINUX_SANITIZED_HEADER_DIR=linux-libc-headers-2.6.11.
> GLIBCTHREADS_FILENAME=glibc-linuxthreads-2.3.5
>
> The problem that I am having is that ld does not seem
> to find some of the X11 libs that it should.
> When I execute this:
> g++  -o mythbrowser main.o webpage.o tabview.o
> moc_webpage.o moc_tabview.o   -L/usr/lib/qt-3.3/lib
> -L/opt/crosstool/gcc-3.4.4-glibc-2.3.5/i686-unknown-linux-gnu/i686-unknown-linux-gnu/usr/X11R6/lib
> -L/opt/crosstool/gcc-3.4.4-glibc-2.3.5/i686-unknown-linux-gnu/i686-unknown-linux-gnu/usr/lib
> -lmyth-0.18.1 -L/opt/kde3/lib -lkhtml -lqt-mt -lXext
> -lX11 -lm
>
> I get a bunch of warnings that look like this:
> /opt/crosstool/gcc-3.4.4-glibc-2.3.5/i686-unknown-linux-gnu/lib/gcc/i686-unknown-linux-gnu/3.4.4/../../../../i686-unknown-linux-gnu/bin/ld:
> warning: libXrender.so.1, needed by
> /opt/crosstool/gcc-3.4.4-glibc-2.3.5/i686-unknown-linux-gnu/i686-unknown-linux-gnu/usr/lib/libmyth-0.18.1.so,
> not found (try using -rpath or -rpath-link)
>
> Which eventually turn into errors.
> The problem is that libXrender.so.1 definitely exists
> in one of the library paths specified: 
>
> ls -l
> /opt/crosstool/gcc-3.4.4-glibc-2.3.5/i686-unknown-linux-gnu/i686-unknown-linux-gnu/usr/X11R6/lib/libXrender*
> -rw-r--r--  1 mythtv mkgroup-l-d 38144 Jan 29 21:54
> libXrender.a
> lrwxrwxrwx  1 mythtv mkgroup-l-d    19 Jan 29 21:54
> libXrender.so -> libXrender.so.1.2.2
> lrwxrwxrwx  1 mythtv mkgroup-l-d    19 Jan 29 21:54
> libXrender.so.1 -> libXrender.so.1.2.2
> -rwxr-xr-x  1 mythtv mkgroup-l-d 29636 Jan 29 21:54
> libXrender.so.1.2.2
>
> I tried addding -rpath and/or -rpath-link to the
> compile but the results were the same (ie the lib is
> not found).
>
> I was able to resolve the problem for one library by
> adding it the compile string explictly e.g.:
> g++  -o mythbrowser main.o webpage.o tabview.o
> moc_webpage.o moc_tabview.o   -L/usr/lib/qt-3.3/lib
> -L/opt/crosstool/gcc-3.4.4-glibc-2.3.5/i686-unknown-linux-gnu/i686-unknown-linux-gnu/usr/X11R6/lib
> -L/opt/crosstool/gcc-3.4.4-glibc-2.3.5/i686-unknown-linux-gnu/i686-unknown-linux-gnu/usr/lib
> -lmyth-0.18.1 -L/opt/kde3/lib -lkhtml -lqt-mt -lXext
> -lX11 -lm -lXrender
>
> but this is really not a workable strategy because
> there are so many X11 libs.
>
> Any ideas.
>
> Thanks,
> J
>
>
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>   
I think -rpath <DIR> is best way to go it should work if it does not
alternatively you can use LD_RUN_PATH and LD_LIBRARY_PATH environment 
variables.
btw. what does the DT_NEEDED entries show for libmyth-0.18.1.so

--
Khem Raj <khem@mvista.com>
MontaVista Software, Inc.
www.mvista.com



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