# Building egcs-1.0

Now that egcs is configured, you are ready to build the compiler and runtime libraries.

We highly recommend that egcs be built using gnu-make; other versions make work, then again they might not. To be safe build with gnu-make.

Building a native compiler

For a native build issue the command "make bootstrap". This will build the entire egcs compiler system, which includes the following steps:

- Build host tools necessary to build the compiler such as texinfo, bison, gperf.

- Build target tools for use by the compiler such as gas, gld, and binutils.

- Perform a 3-stage bootstrap of the compiler.

- Perform a comparison test of the stage2 and stage3 compilers.

- Build runtime libraries using the stage3 compiler from the previous step.

If you are short on disk space you might consider "make bootstrap-lean" instead. This is identical to "make bootstrap" except that object files from the stage1 and stage2 of the 3-stage bootstrap of the compiler are deleted as soon as they are no longer needed.

Building a cross compiler

We recommend reading the crossgcc FAQ for information about building cross compilers.

For a cross build, issue the command "make cross", which performs the following steps:

- Build host tools necessary to build the compiler such as texinfo, bison, gperf.

- Build target tools for use by the compiler such as gas, gld, and binutils.

- Build the compiler (single stage only).

- Build runtime libraries using the compiler from the previous step.

Note that if an error occurs in any step the make process will exit.

Last modified on December 2, 1997.