GNU bug report logs - #10888
Wait, isn't rpath supposed to be set automagically?

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Date: Sun, 26 Feb 2012 16:10:54 +0100
From: Stefano Lattarini <stefano.lattarini@HIDDEN>
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To: Miles Bader <miles@HIDDEN>
Subject: Re: Wait, isn't rpath supposed to be set automagically?
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	Content preview:  On 02/26/2012 03:47 PM,
	Miles Bader wrote: > I thought that
	as long as one used ".la" libraries,
	automake+libtool > was supposed to handle
	all the grotty stuff like rpath automatically, > adding -rpath $(libdir)
	if you depend on libraries installed to libdir > and libdir isn't on
	the system
	library search path. [Yeah, I also > know some people hate rpath,
	but ...] > > But ... it doesn't seem to. Is something broken,
	is there an option I
	> should set... or? > > [I guess I can add "-rpath <blahblaha>"
	somewhere in Makefile.am,
	but > I don't really want to add system-dependent stuff that
	libtool's > supposed to be handling;
	isn't that why libtool exists in the
	first > place?] > > automake version 1.11.3,
	libtool version 2.4.2 > > Thanks, 
	> > -Miles > > > Example: > > configure.ac: > AC_INIT([blah], [0.1],
	[bob]) > AM_INIT_AUTOMAKE([foreign]) > LT_INIT > AC_PROG_CC >
	AC_CONFIG_FILES([Makefile])
	> AC_OUTPUT > Makefile.am: > bin_PROGRAMS = blah > lib_LTLIBRARIES =
	liboink.la
	> blah_SOURCES = blah.c > blah_LDADD = liboink.la > liboink_la_SOURCES
	=
	oink.c > blah.c: > extern void oink (); > int main () { oink ();
	} > oink.c:
	> void oink () { } > > Commands: > $ autoreconf --install > ... > $
	./configure > ... > $ make > ... > $ sudo make install > ... > $
	/usr/local/bin/blah
	> /usr/local/bin/blah: error while loading shared libraries:
	liboink.so.0:
	cannot open shared object file: No such file or directory > $
	LD_LIBRARY_PATH=/usr/local/lib
	/usr/local/lib/blah > $ ldd /usr/local/bin/blah > linux-vdso.so.1 =>
	(0x00007fff247c5000) > liboink.so.0 => not found > libc.so.6 =>
	/lib/x86_64-linux-gnu/libc.so.6
	(0x00007f5ceeb26000) > /lib64/ld-linux-x86-64.so.2 (0x00007f5ceeed1000)
	>
	$ readelf -d /usr/local/bin/blah | grep RPATH > $ > I must admit I know
	very little of the Automake's libtool support,
	so I'm not sure whether this is
	a bug or not; still, the automake documentation reads somewhere: [...] 
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 Content preview:  On 02/26/2012 03:47 PM, Miles Bader wrote: > I thought that
    as long as one used ".la" libraries, automake+libtool > was supposed to handle
    all the grotty stuff like rpath automatically, > adding -rpath $(libdir)
   if you depend on libraries installed to libdir > and libdir isn't on the system
    library search path. [Yeah, I also > know some people hate rpath, but ...]
    > > But ... it doesn't seem to. Is something broken, is there an option I
    > should set... or? > > [I guess I can add "-rpath <blahblaha>" somewhere
    in Makefile.am, but > I don't really want to add system-dependent stuff that
    libtool's > supposed to be handling; isn't that why libtool exists in the
    first > place?] > > automake version 1.11.3, libtool version 2.4.2 > > Thanks,
    > > -Miles > > > Example: > > configure.ac: > AC_INIT([blah], [0.1], [bob])
    > AM_INIT_AUTOMAKE([foreign]) > LT_INIT > AC_PROG_CC > AC_CONFIG_FILES([Makefile])
    > AC_OUTPUT > Makefile.am: > bin_PROGRAMS = blah > lib_LTLIBRARIES = liboink.la
    > blah_SOURCES = blah.c > blah_LDADD = liboink.la > liboink_la_SOURCES =
   oink.c > blah.c: > extern void oink (); > int main () { oink (); } > oink.c:
    > void oink () { } > > Commands: > $ autoreconf --install > ... > $ ./configure
    > ... > $ make > ... > $ sudo make install > ... > $ /usr/local/bin/blah
   > /usr/local/bin/blah: error while loading shared libraries: liboink.so.0:
    cannot open shared object file: No such file or directory > $ LD_LIBRARY_PATH=/usr/local/lib
    /usr/local/lib/blah > $ ldd /usr/local/bin/blah > linux-vdso.so.1 => (0x00007fff247c5000)
    > liboink.so.0 => not found > libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6
    (0x00007f5ceeb26000) > /lib64/ld-linux-x86-64.so.2 (0x00007f5ceeed1000) >
    $ readelf -d /usr/local/bin/blah | grep RPATH > $ > I must admit I know very
    little of the Automake's libtool support, so I'm not sure whether this is
    a bug or not; still, the automake documentation reads somewhere: [...] 
 
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On 02/26/2012 03:47 PM, Miles Bader wrote:
> I thought that as long as one used ".la" libraries, automake+libtool
> was supposed to handle all the grotty stuff like rpath automatically,
> adding -rpath $(libdir) if you depend on libraries installed to libdir
> and libdir isn't on the system library search path.  [Yeah, I also
> know some people hate rpath, but ...]
> 
> But ... it doesn't seem to.  Is something broken, is there an option I
> should set... or?
> 
> [I guess I can add "-rpath <blahblaha>" somewhere in Makefile.am, but
> I don't really want to add system-dependent stuff that libtool's
> supposed to be handling; isn't that why libtool exists in the first
> place?]
> 
> automake version 1.11.3, libtool version 2.4.2
> 
> Thanks,
> 
> -Miles
> 
> 
> Example:
> 
> configure.ac:
>         AC_INIT([blah], [0.1], [bob])
>         AM_INIT_AUTOMAKE([foreign])
>         LT_INIT
>         AC_PROG_CC
>         AC_CONFIG_FILES([Makefile])
>         AC_OUTPUT
> Makefile.am:
>         bin_PROGRAMS = blah
>         lib_LTLIBRARIES = liboink.la
>         blah_SOURCES = blah.c
>         blah_LDADD = liboink.la
>         liboink_la_SOURCES = oink.c
> blah.c:
>         extern void oink ();
>         int main () { oink (); }
> oink.c:
>         void oink () { }
> 
> Commands:
>         $ autoreconf --install
>                 ...
>         $ ./configure
>                 ...
>         $ make
>                 ...
>         $ sudo make install
>                 ...
>         $ /usr/local/bin/blah
>         /usr/local/bin/blah: error while loading shared libraries: liboink.so.0: cannot open shared object file: No such file or directory
>         $ LD_LIBRARY_PATH=/usr/local/lib /usr/local/lib/blah
>         $ ldd /usr/local/bin/blah
>                 linux-vdso.so.1 =>  (0x00007fff247c5000)
>                 liboink.so.0 => not found
>                 libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f5ceeb26000)
>                 /lib64/ld-linux-x86-64.so.2 (0x00007f5ceeed1000)
>         $ readelf -d /usr/local/bin/blah | grep RPATH
>         $ 
> 
I must admit I know very little of the Automake's libtool support, so I'm
not sure whether this is a bug or not; still, the automake documentation
reads somewhere:

  For libraries whose destination directory is known when Automake runs,
  Automake will automatically supply the appropriate -rpath option to
  libtool. This is the case for libraries listed explicitly in some
  installable _LTLIBRARIES variables such as lib_LTLIBRARIES.

so we have *at least* a documentation issue.  I should look at this more
carefully (probably after the 1.12 release); for now, I'm opening a report
in the bug tracker so that we won't forget about the issue.

Thanks,
  Stefano