Name Mangling

Did you ever hear about Name Mangling? I didn't myself! But it is important to take a look at :)

Cross Compiling the hard way...

This tutorial contains many hints about cross compiling. You'll never need to understand all this stuff, but it is worth reading anyway! In practice, cross compilers are already built and you'll just use them!
http://www.landley.net/ols/ols2007/tutorial.txt

Predefined Macros in gcc

From the gcc man page:

-dCHARS
CHARS is a sequence of one or more of the following characters, and must not be preceded by a space. Other characters are interpreted by the compiler proper, or reserved for future versions of GCC, and so are silently ignored. If you specify characters whose behavior conflicts, the result is undefined.

M Instead of the normal output, generate a list of #define directives for all the macros defined during the execution of the preprocessor, including predefined macros. This gives you a way of finding out what is predefined in your version of the preprocessor. Assuming you have no file foo.h, the command

touch foo.h; cpp -dM foo.h

will show all the predefined macros.

Compiling 32-bit Applications on 64-bit Linux Hosts

You need to install the gcc-mutlilib package. Then:
$ gcc -o hello -m32 hello.c

the -m32 flag tells the compiler to target the 32-bit architecture instead of the 64-bit architecture

Also, you may need to take a look at this looooooong discussion:
http://ubuntuforums.org/showthread.php?t=24575

For kernel compiling, you will need to explicitly specify the architecture:

$ make ARCH=i386 menuconfig

$ make ARCH=i386 bzImage

Happy compiling :)

*** Returning to this issue with Makefiles

just run:

$make CFLAGS=-m32 LDFLAGS=-m32

this adds the -m32 option to both the compiler flags and the linker flags

iwl3945 Finally Working :)

This post saved me from throwing away the Linux 2.6.24 kernel :)
http://ubuntuforums.org/showthread.php?p=4612681

PDF Multiple Page Per Sheet in Linux

To print multiple pages/sheet, you'll need the `pdfjam' package installed. Then,

$pdfnup --nup 1x2 input.pdf