Skip to content
  • Categories
  • Recent
  • Tags
  • Popular
  • Users
  • Groups
  • Search
  • Get Qt Extensions
  • Unsolved
Collapse
Brand Logo
  1. Home
  2. Qt Development
  3. General and Desktop
  4. Some strange problem related Qt static library.
Forum Updated to NodeBB v4.3 + New Features

Some strange problem related Qt static library.

Scheduled Pinned Locked Moved General and Desktop
4 Posts 3 Posters 1.9k Views 1 Watching
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • M Offline
    M Offline
    mady
    wrote on last edited by
    #1

    I have created a static library using already available Qt static libraries like core/gui/network/xml, I included them in my development project and created my static library myLib.lib.

    Now I wanted to write a Qt based test app which will be using my lib but it seems I need to include all those Qt libraries again in my test app, is it correct or I missed something?
    Without including xml and network Qt libs it is giving linker error.

    1 Reply Last reply
    0
    • C Offline
      C Offline
      cincirin
      wrote on last edited by
      #2

      I know that if you use the VC compiler, and "link" some static library with other third-party libraries, then there is no need for your application to be linked with those third-party libraries. If you use MinGW compiler, I think it comes in the situation you mentioned. However a static library can not be "linked" with other third-party libraries, only dynamic libraries and applications can be in the true sense in link with other libraries.

      1 Reply Last reply
      0
      • M Offline
        M Offline
        mady
        wrote on last edited by
        #3

        But I am using Visual Studio compiler.

        1 Reply Last reply
        0
        • L Offline
          L Offline
          lgeyer
          wrote on last edited by
          #4

          Well, when you compile something static the linker does not include all the symbols in the resulting binary, it usually just picks the ones referenced. So if your library A has references to symbols 1, 2 and 3 of library B only those are included. If your application now references symbol 4, 5 and 6 of library B, but is just linked against A (which has only 1, 2 and 3) you will get an linker error and you will have to link against library B again (so the linker can pull out symbol 4, 5 and 6).

          1 Reply Last reply
          0

          • Login

          • Login or register to search.
          • First post
            Last post
          0
          • Categories
          • Recent
          • Tags
          • Popular
          • Users
          • Groups
          • Search
          • Get Qt Extensions
          • Unsolved