[toolchain/uClibc] backport upstream fix for dst computation

[openwrt.git] / docs / build.tex

diff --git a/docs/build.tex b/docs/build.tex
index cc7f5fd..6e1539a 100644 (file)
--- a/docs/build.tex
+++ b/docs/build.tex
@@ -41,11 +41,10 @@ So let's take a look at OpenWrt and see how this all works.
 
 \subsubsection{Download OpenWrt}
 
-This article refers to the "Kamikaze" branch of OpenWrt, which can be downloaded via
-subversion using the following command:
+OpenWrt can be downloaded via subversion using the following command:
 
 \begin{Verbatim}
-$ svn checkout https://svn.openwrt.org/openwrt/trunk kamikaze
+$ svn checkout svn://svn.openwrt.org/openwrt/trunk openwrt-trunk
 \end{Verbatim}
 
 Additionally, there is a trac interface on \href{https://dev.openwrt.org/}{https://dev.openwrt.org/}
@@ -88,7 +87,7 @@ $ ./scripts/feeds update
 
 Those packages can be used to extend the functionality of the build system and need to be
 symlinked into the main trunk. Once you do that, the packages will show up in the menu for
-configuration. From kamikaze you would do something like this:
+configuration. You would do something like this:
 
 \begin{Verbatim}
 $ ./scripts/feeds search nmap
@@ -182,7 +181,7 @@ and packages will be in the "\texttt{bin/packages}" directory.
 
 One of the things that we've attempted to do with OpenWrt's template system is make it
 incredibly easy to port software to OpenWrt. If you look at a typical package directory
-in OpenWrt you'll find two things:
+in OpenWrt you'll find several things:
 
 \begin{itemize}
     \item \texttt{package/\textit{<name>}/Makefile}
@@ -204,7 +203,6 @@ simplifies the entire ordeal.
 Here for example, is \texttt{package/bridge/Makefile}:
 
 \begin{Verbatim}[frame=single,numbers=left]
-# $Id: Makefile 5624 2006-11-23 00:29:07Z nbd $
 
 include $(TOPDIR)/rules.mk
 
@@ -294,7 +292,7 @@ directly as the Nth argument to \texttt{BuildPackage}.
 
     \begin{itemize}
         \item \texttt{SECTION} \\
-            The type of package (currently unused)
+            The section of package (currently unused)
         \item \texttt{CATEGORY} \\
             Which menu it appears in menuconfig: Network, Sound, Utilities, Multimedia ...
         \item \texttt{TITLE} \\
@@ -307,6 +305,9 @@ directly as the Nth argument to \texttt{BuildPackage}.
             Which packages must be built/installed before this package. To reference a dependency defined in the
                        same Makefile, use \textit{<dependency name>}. If defined as an external package, use 
                        \textit{+<dependency name>}. For a kernel version dependency use: \textit{@LINUX\_2\_<minor version>}
+               \item \texttt{BUILDONLY} (optional) \\
+                       Set this option to 1 if you do NOT want your package to appear in menuconfig.
+                       This is useful for packages which are only used as build dependencies.
     \end{itemize}
 
 \textbf{\texttt{Package/\textit{<name>}/conffiles} (optional):} \\
@@ -384,6 +385,58 @@ After you have created your \texttt{package/\textit{<name>}/Makefile}, the new p
 will automatically show in the menu the next time you run "make menuconfig" and if selected
 will be built automatically the next time "\texttt{make}" is run.
 
+\subsection{Creating binary packages}
+
+You might want to create binary packages and include them in the resulting images as packages.
+To do so, you can use the following template, which basically sets to nothing the Configure and
+Compile templates.
+
+\begin{Verbatim}[frame=single,numbers=left]
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=binpkg
+PKG_VERSION:=1.0
+PKG_RELEASE:=1
+
+PKG_SOURCE:=binpkg-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=http://server
+PKG_MD5SUM:=9b7dc52656f5cbec846a7ba3299f73bd
+PKG_CAT:=zcat
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/binpkg
+  SECTION:=net
+  CATEGORY:=Network
+  TITLE:=Binary package
+endef
+
+define Package/bridge/description
+  Binary package
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+endef
+
+define Package/bridge/install
+    $(INSTALL_DIR) $(1)/usr/sbin
+    $(INSTALL_BIN) $(PKG_BUILD_DIR)/* $(1)/usr/sbin/
+endef
+
+$(eval $(call BuildPackage,bridge))
+\end{Verbatim}
+
+Provided that the tarball which contains the binaries reflects the final
+directory layout (/usr, /lib ...), it becomes very easy to get your package
+look like one build from sources.
+
+Note that using the same technique, you can easily create binary pcakages
+for your proprietary kernel modules as well.
+
 \subsection{Creating kernel modules packages}
 
 The OpenWrt distribution makes the distinction between two kind of kernel modules, those coming along with the mainline kernel, and the others available as a separate project. We will see later that a common template is used for both of them.
@@ -395,7 +448,6 @@ For external kernel modules, you can add them to the build system just like if t
 Here for instance the Makefile for the I2C subsytem kernel modules :
 
 \begin{Verbatim}[frame=single,numbers=left]
-# $Id $
 
 I2CMENU:=I2C Bus
 
@@ -494,7 +546,7 @@ The script \texttt{./scripts/env} is used to manage these environments, it uses
 
 The command 
 \begin{Verbatim}
-  \texttt{./scripts/env help}
+  ./scripts/env help
 \end{Verbatim}
 produces a short help text with a list of commands.