Porting GCC to your OS
Difficulty level |
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Master |
This page is a work in progress.
This page may thus be incomplete. Its content may be changed in the near future.
- Read GCC Cross-Compiler.
- Make a OS Specific Toolchain.
- Read Hosted GCC Cross-Compiler.
- Have a sufficient C Library. GCC is fairly portable and needs the C standard library, and some extensions from POSIX. It needs fork and exec, for instance, to run the assembler and linker. You will need a C++ standard library (such as libstdc++) as GCC is now written in C++.
- Cross-compile libgmp, libmpc, libmpfr and other dependencies with instructions in Cross-Porting Software.
- Likewise cross-compile Binutils and GCC, but pass the special configure options
--with-build-sysroot=/your/sysroot
and--with-sysroot=/
. The option--with-build-sysroot
option uses that sysroot for the duration of the build, but the final program does not remember it.--with-sysroot=/
should not be needed or should be set to the empty string, but some binutils/gcc versions are buggy and require it, which has the disadvantage the final toolchain might use//foo
instead of/foo
. You should only pass these options to the Binutils and GCC builds, some other packages also have a--with-sysroot
option, but it instead means a libtool feature you should not use. - Become self-hosting and complete Bare Bones II. Congratulations.