HP UX Software Transition Kit (STK) manual Library Example IPF Compatibility Mode Link

$ a.out

dld.so: Unable to find library 'libfile2.1' $ export SHLIB_PATH=/var/tmp

$ a.out in file1 in file2

Library Example: IPF Compatibility Mode Link

This example builds a compatibility mode library and does a compatibility mode link. The +s option is not specified at link time, so the dynamic loader does not look at any environment variables to do dynamic path searching.

#build compatibility mode dlls

#libfile1.so is a dependent of libfile2.so

ld -b file1.o -o libfile1.so +h libfile1.1

ld -b file2.o -o libfile2.so +h libfile2.1 -L. -lfile1 +compat ln -s libfile1.so libfile1.1

ld main.o +compat -L. -lfile2 -lc

#move dependent lib so dld can't find it. Even when we specify SHLIB_PATH dld won't be

#able to find the dependent because we didn't link with +s

mv libfile2.so /var/tmp

ln -s /var/tmp/libfile2.so /var/tmp/libfile2.1 a.out

dld.so: Unable to find library '1:./libfile2.1' export SHLIB_PATH=/var/tmp

a.out

dld.so: Unable to find library '1:./libfile2.1'

You can use chatr+s to enable a.out in file1 and file2:

$ chatr +s enable a.out

Library Example: Using IPF Compatibility and Standard Shared Libraries

This example mixes compatibility and standard mode shared libraries. It uses PA-32-style linking and loading for the compatibility mode libraries and IPF/PA-64-style linking and loading for standard mode libraries.

#build standard mode dlls

#libfile1.so is a dependent of libfile2

$ ld -b file1.o -o libfile1.so +h libfile1.1 $ mkdir TMP

$ ld -b +b $pwd/TMP file2.o -o libfile2.so +h libfile2.1 -L. -lfile1

# build compatibility mode dlls

# libfile3.so is a dependent of libfile4

$ ld -b file3.o -o libfile3.so +h libfile3.1

$ ld -b file4.o -o libfile4.so +b $pwd/TMP +h libfile4.1 +compat -L. -lfile3 $ ln -s libfile1.so libfile1.1

$ ln -s libfile3.so libfile3.1 $ mv libfile1.so TMP

$ mv libfile3.so TMP $ cd TMP

$ ln -s libfile1.so libfile1.1 $ ln -s libfile3.so libfile3.1

$ cd ..# link with +b so ld will use RPATH at link time to find

# libfile1.so (standard mode dll)

# the linker will not use RPATH to find libfile3.so

# (compatibility mode dll)

# Note that this is true in both a standard mode link and a

# compatibility mode link. The

# linker never uses RPATH to find any compatibility mode dlls

$ ld -b +b pwd/TMP main.o -o libfile5.so +h libfile5.1 -L. -lfile2 -lfile4 ld: Can't find dependent library "./libfile3.so"

$ ld -b +b pwd/TMP main.o -o libfile5a.so +h libfile5.1 -L. -lfile2 -lfile4 +compat ld: Can't find dependent library "./libfile3.so"

Comparing Breadth-first and Depth-first Search in IPF/PA-64 Mode

For the following libraries with dependencies:

lib1.so has dependents lib2.so, lib3.so, and lib4.so lib2.so has dependents lib2a.so and lib2b.so

Using Shared Libraries in Default Mode 133