Static build Qt application with dynamic link with 3rd party library.

[samdol]

Hi,

If I build an application by static Qt compile, do I have to include 3rd party library statically not dynamically?
And if I build an application by dynamic Qt compile, do I have to include 3rd party library dynamically not statically?

[VRonin]

Nope, the link method of a library does nothing for the linking method of other libraries. You are free to mix and match as much as you want.

The exception is cross dependency:

• Library A links to Library B dynamically
• Application C links to library B statically and to library A
• Bad things happen

[samdol]

@VRonin

Thank you. Do you mean that:
App <--S--> libA <--S--> libB (O)
App <--D--> libA <--D--> libB (O)
App <--D--> libA <--S--> libB (O)
App <--S--> libA <--D--> libB (X)

[VRonin]

not quite, all your cases are ok

       ┌ ⇒ D ⇒ libA ⇒ D ⇒ libB
Ok: App┤
       └ ⇒ D ⇒ libB

       ┌ ⇒ S ⇒ libA ⇒ D ⇒ libB
Ok: App┤
       └ ⇒ D ⇒ libB

       ┌ ⇒ S ⇒ libA ⇒ S ⇒ libB
Ok: App┤
       └ ⇒ S ⇒ libB

       ┌ ⇒ D ⇒ libA ⇒ D ⇒ libB
No: App┤
       └ ⇒ S ⇒ libB

[samdol]

@VRonin
How about following thee cases?

   ┌ ⇒ D ⇒ libA ⇒ S ⇒ libB
App┤
   └ ⇒ S ⇒ libB

   ┌ ⇒ D ⇒ libA ⇒ S ⇒ libB
App┤
   └ ⇒ D ⇒ libB

   ┌ ⇒ S ⇒ libA ⇒ S ⇒ libB
App┤
   └ ⇒ D ⇒ libB

[VRonin]

1. I think it's ok
2. No
3. No

[samdol]

@VRonin

Thank you for your detail explain. It sounds clearer now.