113 lines
4.1 KiB
TeX
113 lines
4.1 KiB
TeX
The following section gives some tips and tricks on how to use efficiently
|
|
OpenWrt on a regular basis and for daily work.
|
|
|
|
\subsection{Compiling/recompiling components}
|
|
|
|
The buildroot allows you to recompile the full environment or only parts of it
|
|
like the toolchain, the kernel modules, the kernel or some packages.
|
|
|
|
For instance if you want to recompile the toolchain after you made any change to it
|
|
issue the following command:
|
|
|
|
\begin{Verbatim}
|
|
make toolchain/{clean,compile,install}
|
|
\end{Verbatim}
|
|
|
|
Which will clean, compile and install the toolchain. The command actually expands to the
|
|
following:
|
|
|
|
\begin{Verbatim}
|
|
make[1] toolchain/clean
|
|
make[2] -C toolchain/kernel-headers clean
|
|
make[2] -C toolchain/binutils clean
|
|
make[2] -C toolchain/gcc clean
|
|
make[2] -C toolchain/uClibc clean (glibc or eglibc when chosen)
|
|
\end{Verbatim}
|
|
|
|
Of course, you could only choose to recompile one or several of the toolchain components
|
|
(binutils, kernel-headers gcc, C library) individually.
|
|
|
|
The exact same idea works for packages:
|
|
|
|
\begin{Verbatim}
|
|
make package/busybox/{clean,compile,install}
|
|
\end{Verbatim}
|
|
|
|
will clean, compile and install buysbox (if selected to be installed on the final rootfs).
|
|
|
|
Supposing that you made changes to the Linux kernel, but do not want to recompile everything,
|
|
you can recompile only the kernel modules by issuing:
|
|
|
|
\begin{Verbatim}
|
|
make target/linux/compile
|
|
\end{Verbatim}
|
|
|
|
To recompile the static part of the kernel use the following command:
|
|
|
|
\begin{Verbatim}
|
|
make target/linux/install
|
|
\end{Verbatim}
|
|
|
|
\subsection{Using quilt inside OpenWrt}
|
|
|
|
OpenWrt integrates quilt in order to ease the package, kernel and toolchain
|
|
patches maintenance when migrating over new versions of the software.
|
|
|
|
Quilt intends to replace an old workflow, where you would download the new
|
|
source file, create an original copy of it, an a working copy, then try to
|
|
apply by hand old patches and resolve conflicts manually. Additionnaly, using
|
|
quilt allows you to update and fold patches into other patches easily.
|
|
|
|
Quilt is used by default to apply Linux kernel patches, but not for the other
|
|
components (toolchain and packages).
|
|
|
|
\subsubsection{Using quilt with kernel patches}
|
|
|
|
Assuming that you have everything setup for your new kernel version:
|
|
\begin{itemize}
|
|
\item \texttt{LINUX\_VERSION} set in the target Makefile
|
|
\item config-2.6.x.y existing
|
|
\item patches-2.6.x.y containing the previous patches
|
|
\end{itemize}
|
|
|
|
Some patches are likely to fail since the vanilla kernel we are patching
|
|
received modifications so some hunks of the patches are no longer applying.
|
|
We will use quilt to get them applying cleanly again. Follow this procedure
|
|
whenever you want to upgrade the kernel using previous patches:
|
|
|
|
\begin{enumerate}
|
|
\item make target/linux/clean (removes the old version)
|
|
\item make target/linux/compile (uncompress the kernel and try to apply patches)
|
|
\item if patches failed to apply:
|
|
\item cd build\_dir/linux-target/linux-2.6.x.y
|
|
\item quilt push -a (to apply patches where quilt stopped)
|
|
\item quilt push -f (to force applying patches)
|
|
\item edit .rej files, apply the necessary changes to the files
|
|
\item remove .rej files
|
|
\item quilt refresh
|
|
\item repeat operation 3 and following until all patches have been applied
|
|
\item when all patches did apply cleanly: make target/linux/refresh
|
|
\end{enumerate}
|
|
|
|
Note that generic (target/linux/generic-2.6/linux-2.6.x/) patches can be found in
|
|
\texttt{build\_dir/linux-target/linux-2.6.x.y/patches/generic} and platform specific
|
|
patches in \texttt{build\_dir/linux-target/linux-2.6.x.y/patches/platform}.
|
|
|
|
\subsubsection{Using quilt with packages}
|
|
|
|
As we mentionned earlier, quilt is enabled by default for kernel patches, but not for
|
|
packages. If you want to use quilt in the same way, you should set the QUILT environment
|
|
variable to 1, e.g:
|
|
|
|
\begin{Verbatim}
|
|
make package/buysbox/{clean,compile} QUILT=1
|
|
\end{Verbatim}
|
|
|
|
Will generate the patch series file and allow you to update patches just like we described
|
|
before in the kernel case. Note that once all patches apply cleanly you should refresh them
|
|
as well using the following command:
|
|
|
|
\begin{Verbatim}
|
|
make package/buysbox/refresh QUILT=1
|
|
\end{Verbatim}
|