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From: Patrick Bussi <patrick.bussi@free.fr>
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To: discuss@linmodems.org
Subject: Re: Compile errors with pctel-0.9.4 -- solved
Date: Mon, 7 Oct 2002 01:10:23 +0200
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Hello,

The solution came from the mail below. This mail is only to conclude and 
explain. This may appear obvious to experts in software, of which I am not.

In my configuration the symbolic link "linux" was linked with an old version 
of the kernel (2.4.3), because it was the last known version of the sources 
in this PC. I had installed a more recent kernel (2.4.18) from a 3 CD 
Mandrake distribution which included a 2.4.18 binaries, but not the sources. 
I was absolutely not aware of this.

Now, I have downloaded the 2.4.19 sources and tried my best to configure and 
compile the kernel as it was on the 2.4.18 binary version. Then to configure 
and compile the pctel driver on the same kernel. After many attempts and 
several nights, it worked.

I suggest that a "Caution" should be added in the FAQ.

Most often the installation guide request to check `uname -r`. This is not 
enough, because it refers to the kernel currently in use, but do not check 
that the sources of this version are available. One should also check that 
/usr/src/ contains a link to the same version as returned by `uname`. Such as:

lrwxrwxrwx 1 root root 12 sep 30 23:53 linux -> linux-2.4.19/

More : I tried, as suggested below, the command:

[src]# ./configure --with-hal=pct789 \ 
--with-kernel-include=/usr/src/linux-2.4.19/include/

This was OK untill installation of the driver. But the symbolic link seems to 
be required by the "make install" script and therefore I wonder what is the 
usefullness of the "--with-kernel-include" option. I am not skilled enough 
for more investigation.

Thanks for the help I received. Many wishes of success to all of you.

Patrick.

> Maybe is a configuration error. You should tell configure the path to 
> the kernel headers for 2.4.18-6mdk kernel as it will take some things 
> from the kernel include files. Most probably you did not tell anything 
> and from your old installation there is a symbolic link 
> /usr/src/linux -> /path/to/kernel-2.4.3. 
> If that is the case, you should have headers for the 2.4.18-6mdk and 
> tell the configure script where to find them with 
> --with-kernel=/path/to/kernel-2.4.18-6mdk argument to ./configure. 
> 
> Hope this helps 
> 
> Lazar 
>