problem with linking

[wysota]

Your includes are fine, it's not a problem with them.

[mickey]

is it better put them in implementaion (from designer)? what's the problem?thanks

[mickey]

sorry .Have anyone any hints on my slow linking speed? it goes slow when I change something in mainform.ui.h.....so I thought the problem is there....

[wysota]

The linking itself should have more or less constant time. The compilation time may vary. Are you sure it is the linking phase that is so time consuming?

[mickey]

no I'm not sure; I see if I do ; nmake clean; qmake; nmake; on nmake it seems stop on this:

qmake_image_collection.cpp
Generating Code...

qmake_image_collection.cpp
Generating Code...

To copy to clipboard, switch view to plain text mode 

then if I change mainform.ui.h and type nmake it seems stop on mainform.cpp

[gfunk]

If it really is mainform.cpp, maybe you can comment out (temporarily) certain parts of the code in that file to see what might be causing it (though making sure it's still compileable)? Divide and conquer, etc.
Was there something you changed recently that caused the slow linking? Added any libraries?

If it's always been slow, I'd just go ahead and blame Microsoft.

[wysota]

no I'm not sure; I see if I do ; nmake clean; qmake; nmake; on nmake it seems stop on this:

qmake_image_collection.cpp
Generating Code...

qmake_image_collection.cpp
Generating Code...

To copy to clipboard, switch view to plain text mode 

then if I change mainform.ui.h and type nmake it seems stop on mainform.cpp

Then it might be caused by a large number of includes or cycles in inclusions. Try using precompiled headers and don't double include items in .ui.h and designer implementation section. It's enough to include in one of those places (as .ui.h is included into generated implementation file).

[mickey]

thanks; I have some # at the begon of mainform.ui.h file; other are in implementation from designer (they aren't the same!). is this ok?
THen I subclassed mainform to myMainform: now in mymainform.cpp file I find same include that are in mainform.ui.h; can I avoid this? and how? can this a problem?thanks...

[mickey]

only possible recursive incude is "mywidget.h" put in mainform.ccp from compiler, and a ponter to mainForm* w, member of mywidget class (inside mywidget.h, but I need it there!!). anyway I use

#ifndef MYWIDGET_H
#define MYWIDGET_H
.......................
#endif

#ifndef MYWIDGET_H
#define MYWIDGET_H
.......................
#endif

To copy to clipboard, switch view to plain text mode 

in mywidget.h. Can it be? can I avoid?

[wysota]

Can it be? can I avoid?

First of all try to use precompiled headers and see how much it helps (it will help much, but if it help too much it means that you may have some include cycles or something like that).

[mickey]

sorry for question, but what are the precompiled headers? I think you're refer an .net option but wich? I choose generate automatically and don't change nothing in compiling..; others get errors...

[mickey]

I don't know if can useful to solve problem but after generation code......(where sometimes goes slow) after appear this:

Generating Code...
cl -c -nologo -Zm200 -W3 -w34100 -w34189 -MD -O1 -GX -DUNICODE -DWIN32 -DQT_THREAD_SUPPORT -DQT_DLL -DQT_THREAD_SUPPORT -DQT_NO_DEB
UG -I".." -I"C:\code\glew\include" -I"C:\Qt\3.2.0Educational\include" -I"ui\\" -I"D:\XXX\prog\XEd" -I"D:\XXX\prog\XEd" -I"moc\\" -I"C:\Qt\3.2.0Educational\mkspecs\win32-msvc.net" -Foobj\ @C:\DOCUME~1\as\IMPOST~1\Temp\nm126.tmp

[wysota]

sorry for question, but what are the precompiled headers? I think you're refer an .net option but wich? I choose generate automatically and don't change nothing in compiling..; others get errors...

Read the article in our wiki.

[mickey]

ok I get out some include from mainform.ui.h; I change .pro and I inserte also stable.h line in include file (in the .pro I mean. right this??). I put #include "stable.h" in mainform.ui.h file
Is it all right? for the moment compilation time is the same...

[gfunk]

Incidentally, what are the specs on your machine? How fast is it? How much memory does it have?