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Chapter 6 213
Shared Library Management Routines
Initializers for Shared Libraries
• HP-UX 10.X style initializers are called in forward order of the +I
options specified on the link line when loading a shared library. They
are then called in reverse order when unloading the library.
• HP-UX 10.X style initializers are called after inits and before finis.
• Any inits or finis in archive (.a) files are called only if the .o which
contains it is used during the link. Use the linker -v option to
determine which .o files within an archive file were used.
• Shared libraries on the link line (dependent libraries) follow the
ordering described in “Ordering Among Executables and Shared
Libraries”.
For example, the linker command:
$ ld -b first_64bit.o -l:libfoo.sl second_64bit.o my_64bit.a +I
first_10x_init +I second_10x_init -o libbar.sl
results in the following order when library is loaded:
1. inits from any .o files used in my_64bit.a
2. inits in second_64bit.o
3. inits in first_64bit.o
4. first_10x_init
5. second_10x_init
and the following order when library is unloaded:
1. second_10x_init
2. first_10x_init
3. finis in first_64bit.o
4. finis in second_64bit.o
5. finis from any .o files used in my_64bit.a
NOTE libfoo.sl is ignored in this example. It follows the rules in “Ordering
Among Executables and Shared Libraries”.
Ordering Among Executables and Shared Libraries
When multiple load modules have initializers/terminators, the following
rules apply to ordering: