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(gcc-295.info)Cross-Compiler

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Building and Installing a Cross-Compiler
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   GNU CC can function as a cross-compiler for many machines, but not
all.

   * Cross-compilers for the Mips as target using the Mips assembler
     currently do not work, because the auxiliary programs
     `mips-tdump.c' and `mips-tfile.c' can't be compiled on anything
     but a Mips.  It does work to cross compile for a Mips if you use
     the GNU assembler and linker.

   * Cross-compilers between machines with different floating point
     formats have not all been made to work.  GNU CC now has a floating
     point emulator with which these can work, but each target machine
     description needs to be updated to take advantage of it.

   * Cross-compilation between machines of different word sizes is
     somewhat problematic and sometimes does not work.

   Since GNU CC generates assembler code, you probably need a
cross-assembler that GNU CC can run, in order to produce object files.
If you want to link on other than the target machine, you need a
cross-linker as well.  You also need header files and libraries suitable
for the target machine that you can install on the host machine.

Steps of Cross

Using a cross-compiler involves several steps

that may be carried out on different machines.

Configure Cross

Configuring a cross-compiler.

Tools and Libraries

Where to put the linker and assembler, and the C library.

Cross Headers

Finding and installing header files

for a cross-compiler.

Cross Runtime

Supplying arithmetic runtime routines (`libgcc1.a').

Build Cross

Actually compiling the cross-compiler.