[csw-maintainers] Package incompatibility, any suggestions?

[Roger Håkansson]

Philip Brown wrote:
> On Wed, Mar 25, 2009 at 06:31:22AM +0100, Roger Håkansson wrote:
>> Philip Brown wrote:
>>> nope. direct link.
>>> dump -Lv says it is directly "needed".
>> Well, that isn't so strange, if you link gedit with libX and a function  
>> in libX needs libnet, you'll have to put -lnet when you link gedit, and  
>> then dump will tell you that both libX and libnet is "needed".
>> If you later on rebuild libX without any libnet support, libX will no  
>> longer require libnet, but gedit still will...
> 
> incorrect. 
> 
> that's why we register dependancies the way we do.
> 
> dump -Lv 
> works differently than ldd.

It depends on how libX was created, if it was linked with "-l net" at 
creation, gedit didn't need to be linked to libnet, but if libX wasn't 
gedit had to be linked to libnet.

Example:
main.c calls a(), located in liba.so, which calls b() located in libb.so

ld -G -L. -o liba.so a.o -l b
cc -L. -o main main.c -la
dump -Lv liba.so |grep NEEDED
[1]     NEEDED          libb.so
dump -Lv main |grep NEEDED
[1]     NEEDED          liba.so
[2]     NEEDED          libc.so.1
ld -G -L. -o liba.so a.o
cc -L. -o main main.c -la -lb
dump -Lv liba.so |grep NEEDED
dump -Lv main |grep NEEDED
[1]     NEEDED          liba.so
[2]     NEEDED          libb.so
[3]     NEEDED          libc.so.1