Re: [Mingw-users] abnormal linking time

[Pascal B. <pb...@tr...>]

From: "Greg Chicares" <chi...@mi...>
> Pascal Buhler wrote:
> >
> > I have a large library project that takes on linux under one minute to
link.
> > On Windows using MinGW this same project takes about 30 minutes to build
and
> > up to one hour to link. If I build it as a static library
>
> Are you usually, however, building it as a dll?
> If so, are you using '-shared', or are you using dllwrap?
> This kind of performance is typical of dllwrap.

Yes usually as a dll. I am not using dllwrap that I know of.
Here is the basic configuration.

CFLAGS = -Wall -O2 -fno-exceptions -fno-rtti
CXXFLAGS = -Wall -O2 -fno-exceptions -fno-rtti
LINK = g++
LFLAGS
= -Wl,-s -Wl,-subsystem,windows -shared -Wl,--export-all-symbols -Wl,--out-i
mplib,libsomelib.a

> > up to one hour to link. If I build it as a static library and then link
an
> > application against that, the application takes only around 20 seconds
to
> > link. I really think I must be doing some thing wrong but can't find it.
> >
> > The machine I use is 2GHz with 750 MB ram.
>
> It might be helpful to know resource usage.
> I've built libraries that have taken
>   300 Mb of an available 500 Mb of RAM, and
>   10% of available CPU time,
> and have monopolized the hard drive for
> a few minutes.

For the first 20 minutes cpu is at 100% and the memory usage peaks at around
1GB (not just g++, but I have no other applications running) after that cpu
and memory usage drops and it starts to create the library.

thanks

pascal