Re: [Openexr-devel] unresolved symbols in (shared) libs

[Bob Friesenhahn]

Library dependencies should be specified using LIBADD rather than 
LDFLAGS.  This is because Automake knows about libraries specified via 
LIBADD but not via LDFLAGS.  LDFLAGS is reserved for options like 
-L/foo.  Adding -no-undefined to LDFLAGS is ok since libtool will 
parse it, but using -Wl,--no-undefined is likely to cause the package 
to only work with GNU ld.

Bob

On Thu, 9 Feb 2006, Rex Dieter wrote:

> For details:
> http://bugzilla.redhat.com/bugzilla/165729
>
> In short, with OpenEXR-1.2.2, both libIlmImf.so and libImath.so contain
> undefined symbols (See appended details).
>
> Attached patch does:
> 1.  adds dependant libs to fix unresolved symbols
> 2.  adds -no-undefined -Wl,--no-undefined to <LIB>_la_LDFLAGS
> (though I'm not very certain how portable the latter modification is).
>
> One of the resolved symbols is from zlib, so you can also drop/omit -lz
> from the pkgconfig file OpenEXR.pc as well.
>
> -- Rex
>
>
> $ldd -r /usr/lib/libIlmImf.so
> undefined symbol: uncompress    (/usr/lib/libIlmImf.so)
> undefined symbol: _ZN3Iex13throwErrnoExcERKSs   (/usr/lib/libIlmImf.so)
> undefined symbol: _ZN3Iex7BaseExcD2Ev   (/usr/lib/libIlmImf.so)
> undefined symbol:
> _ZN3Iex7BaseExc6assignERSt18basic_stringstreamIcSt11char_traitsIcESaIcEE
>
> (/usr/lib/libIlmImf.so)
> undefined symbol:
> _ZN3Iex7BaseExcC2ERSt18basic_stringstreamIcSt11char_traitsIcESaIcEE
> (/usr/lib/libIlmImf.so)
> undefined symbol: _ZN3Iex7BaseExcC2EPKc (/usr/lib/libIlmImf.so)
> undefined symbol: _ZN4half7convertEi    (/usr/lib/libIlmImf.so)
> undefined symbol: _ZN3Iex7BaseExcC1EPKc (/usr/lib/libIlmImf.so)
> undefined symbol: compress      (/usr/lib/libIlmImf.so)
> undefined symbol: _ZN3Iex7BaseExcD1Ev   (/usr/lib/libIlmImf.so)
> undefined symbol: _ZTIN3Iex7BaseExcE    (/usr/lib/libIlmImf.so)
> undefined symbol: _ZN4half5_eLutE       (/usr/lib/libIlmImf.so)
> undefined symbol: _ZN4half8_toFloatE    (/usr/lib/libIlmImf.so)
> undefined symbol: _ZNK3Iex7BaseExc4whatEv       (/usr/lib/libIlmImf.so)
>
> $ldd -r /usr/lib/libImath.so
> ...
> undefined symbol: _ZN3Iex7BaseExcD2Ev   (/usr/lib/libImath.so)
> undefined symbol: _ZN3Iex7BaseExcC2EPKc (/usr/lib/libImath.so)
> undefined symbol: _ZTIN3Iex7BaseExcE    (/usr/lib/libImath.so)
> undefined symbol: _ZNK3Iex7BaseExc4whatEv       (/usr/lib/libImath.so)

======================================
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/