Re: Very slow compilation

[Alan Ott <ott acusoft com>]

If you're using GCC 3.4, you can use the new Precompiled Headers.

http://gcc.gnu.org/onlinedocs/gcc-3.4.3/gcc/Precompiled-Headers.html#Precompiled-Headers

The way I did this was make one file which includes the Gtkmm stuff 
(pch.h) and compile that header with gcc -x. All C++ files which need 
gtkmm would then just #include "pch.h". No other files should include 
gtkmm.h, or else the compile will be slow.

I have an example makefile on my machine at home. I can send it to you 
if you want. Let me know.

Alan.



Leif wrote:

> Hi,
>
> I am developing a program using gtkmm and libglademm and (sigc++).
>
> My problem is that it compiles dam much slower than my other programs
> that don't use gtkmm/libglademm. Recompiling a smaller .cpp file takes
> ~10 seconds (without linking, 12 with linking). A .cpp file of
> comparable size, from a project that don't use gtkmm/libglade takes 2
> seconds for compiling and linking.
>
> > From my Makefile.am:
> LIBS = `pkg-config gtkmm-2.4 libglademm-2.0 sigc++-1.2 --libs`
> #CXXFLAGS =
> CPPFLAGS = `pkg-config gtkmm-2.4 libglademm-2.0 sigc++-1.2 --cflags`
>
>
> I tried to replace all ocurences of #include <gtkmm/gtkmm.h> with
> include statements for only the needed files. But no notable difference.
>
>
> Is there anything I can do to speed the compilation up, other than
> buying a new computer or switching to another library?
>
> Best regards,
> Leif Linse
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>