HP XC System 4.x Software - Manual (Page 47)

names. However, HP recommends an alternative method. The dynamic linker, during its attempt
to load libraries, will suffix candidate directories with the machine type. The HP XC system on
the CP4000 platform uses i686 for 32-bit binaries and x86_64 for 64-bit binaries. HP recommends
structuring directories to reflect this behavior. Therefore, if your released directory structure has
a form similar to
Figure 4-1 , then ensure that the LD_LIBRARY_PATH has /opt/mypackage/
lib in it, which will then be able to handle both 32-bit and 64-bit binaries that have linked against
libmystuff.so .
Figure 4-1 Library Directory Structure
If you have an existing pattern using different names, HP recommends introducing links with
the above names. An example of this is shown in
Figure 4-2 .
Figure 4-2 Recommended Library Directory Structure
Linking an application using the library (dynamic or archive) requires you to specify the
appropriate subdirectory, depending on whether the application is 32-bit or 64-bit.
For example, to build a 32-bit application, you might enter:
<32-bit> -L/opt/mypackage/lib/i686 -lmystuff
To build a 64-bit application, you might enter:
<64-bit> -L/opt/mypackage/lib/x86_64 -lmystuff
4.8 Developing Libraries 47