Albert, I checked the source files of my libY. The symbol is declared extern.
Now I dont understand one basic thing: Since both static and shared library versions of libY have this symbol as "U" when I link application X with static version it works but not with shared. Also, point to be noted is X is not using this symbol at all. How does shared and static libraries treat the symbols which are undefined.? Thanks -----Original Message----- From: Albert Chin [mailto:[EMAIL PROTECTED] Sent: Wednesday, October 12, 2005 2:19 PM To: Nitesh Soni (NC/TNT) Cc: 'libtool@gnu.org' Subject: Re: problem linking with shared library On Wed, Oct 12, 2005 at 01:03:12PM -0500, Nitesh Soni (NC/TNT) wrote: > The error linker is giving is: ... libY.so: undefined reference to > 'Z' > > Also, this symbol is not used anywhere in any source code required > to build application X ( i mean if X depends on x.c y.c z.c and > library libY .. none of the sources x.c y.c and z.c use this symbol) That's ok. libY might be dependent on another library where Z is defined. > I am using gcc version 3.3.1 ( MontaVista ) building for x86. Odd that static linking works. You can extract the object files from libY.a to determine which one has Z undefined. As you have the source to libY, you can find out why the symbol is undefined. > -----Original Message----- > From: Albert Chin [mailto:[EMAIL PROTECTED] > Sent: Wednesday, October 12, 2005 1:25 PM > To: Nitesh Soni (NC/TNT) > Cc: libtool@gnu.org > Subject: Re: problem linking with shared library > > On Wed, Oct 12, 2005 at 11:22:42AM -0500, Nitesh Soni (NC/TNT) wrote: > > I am trying to build an executable "X" which links with libY. > > > > I am using libtool to build this library libY; so I have a static > > version libY.a and libY.so > > > > When I link the static version libY.a, i am able to build the > > application X But when I link against the shared version libY.so I > > am not able to build the application; it fails with some undefined > > reference to (lets say) Z > > > > Now I did "nm libY.a" and "nm libY.so" > > > > Both these versions have symbol Z as "U" > > Is symbol Z defined in executable X? > > What specific error is the linker giving? > > What platform? > > -- > albert chin ([EMAIL PROTECTED]) -- albert chin ([EMAIL PROTECTED]) _______________________________________________ http://lists.gnu.org/mailman/listinfo/libtool
