Add 2.6 kernel dependency to gpioctl

[openwrt.git] / docs / build.tex

diff --git a/docs/build.tex b/docs/build.tex
index 03bd1a9..54d31c5 100644 (file)
--- a/docs/build.tex
+++ b/docs/build.tex
@@ -65,25 +65,25 @@ There are four key directories in the base:
 
 \texttt{tools} and \texttt{toolchain} refer to common tools which will be
 used to build the firmware image, the compiler, and the C library.
 
 \texttt{tools} and \texttt{toolchain} refer to common tools which will be
 used to build the firmware image, the compiler, and the C library.

-The result of this is three new directories, \texttt{tool\_build}, which is a temporary
-directory for building the target independent tools, \texttt{toolchain\_build\_\textit{<arch>}}
+The result of this is three new directories, \texttt{build\_dir/host}, which is a temporary
+directory for building the target independent tools, \texttt{build\_dir/toolchain-\textit{<arch>}*}

 which is used for building the toolchain for a specific architecture, and
 which is used for building the toolchain for a specific architecture, and

-\texttt{staging\_dir\_\textit{<arch>}} where the resulting toolchain is installed.
+\texttt{staging\_dir/toolchain-\textit{<arch>}*} where the resulting toolchain is installed.

 You will not need to do anything with the toolchain directory unless you intend to
 add a new version of one of the components above.
 
 \begin{itemize}
 You will not need to do anything with the toolchain directory unless you intend to
 add a new version of one of the components above.
 
 \begin{itemize}

-    \item \texttt{tool\_build}
-    \item \texttt{toolchain\_build\_\textit{<arch>}}
+    \item \texttt{build\_dir/host}
+    \item \texttt{build\_dir/toolchain-\textit{<arch>}*}

 \end{itemize}
 
 \texttt{package} is for exactly that -- packages. In an OpenWrt firmware, almost everything
 is an \texttt{.ipk}, a software package which can be added to the firmware to provide new
 features or removed to save space. Note that packages are also maintained outside of the main
 \end{itemize}
 
 \texttt{package} is for exactly that -- packages. In an OpenWrt firmware, almost everything
 is an \texttt{.ipk}, a software package which can be added to the firmware to provide new
 features or removed to save space. Note that packages are also maintained outside of the main

-trunk and can be obtained from subversion at the following location:
+trunk and can be obtained from subversion using the package feeds system:

 
 \begin{Verbatim}
 
 \begin{Verbatim}

-$ svn checkout https://svn.openwrt.org/openwrt/packages packages
+$ ./scripts/feeds update

 \end{Verbatim}
 
 Those packages can be used to extend the functionality of the build system and need to be
 \end{Verbatim}
 
 Those packages can be used to extend the functionality of the build system and need to be


@@ -91,15 +91,17 @@ symlinked into the main trunk. Once you do that, the packages will show up in th
 configuration. From kamikaze you would do something like this:
 
 \begin{Verbatim}
 configuration. From kamikaze you would do something like this:
 
 \begin{Verbatim}

-$ ls
-kamikaze  packages
-$ ln -s packages/net/nmap kamikaze/package/nmap
+$ ./scripts/feeds search nmap
+Search results in feed 'packages':
+nmap       Network exploration and/or security auditing utility
+
+$ ./scripts/feeds install nmap

 \end{Verbatim}
 
 To include all packages, issue the following command:
 
 \begin{Verbatim}
 \end{Verbatim}
 
 To include all packages, issue the following command:
 
 \begin{Verbatim}

-$ ln -s packages/*/* kamikaze/package/
+$ make package/symlinks

 \end{Verbatim}
 
 \texttt{target} refers to the embedded platform, this contains items which are specific to
 \end{Verbatim}
 
 \texttt{target} refers to the embedded platform, this contains items which are specific to


@@ -108,12 +110,12 @@ directory which is broken down by platform \textit{<arch>} and contains the patc
 kernel, profile config, for a particular platform. There's also the "\texttt{target/image}" directory
 which describes how to package a firmware for a specific platform.
 
 kernel, profile config, for a particular platform. There's also the "\texttt{target/image}" directory
 which describes how to package a firmware for a specific platform.
 

-Both the target and package steps will use the directory "\texttt{build\_\textit{<arch>}}"
+Both the target and package steps will use the directory "\texttt{build\_dir/\textit{<arch>}}"

 as a temporary directory for compiling. Additionally, anything downloaded by the toolchain,
 target or package steps will be placed in the "\texttt{dl}" directory.
 
 \begin{itemize}
 as a temporary directory for compiling. Additionally, anything downloaded by the toolchain,
 target or package steps will be placed in the "\texttt{dl}" directory.
 
 \begin{itemize}

-    \item \texttt{build\_\textit{<arch>}}
+    \item \texttt{build\_dir/\textit{<arch>}}

     \item \texttt{dl}
 \end{itemize}
 
     \item \texttt{dl}
 \end{itemize}
 


@@ -171,7 +173,7 @@ of noise caused by the compile output. To see the full output, run the command
 "\texttt{make V=99}".
 
 During the build process, buildroot will download all sources to the "\texttt{dl}"
 "\texttt{make V=99}".
 
 During the build process, buildroot will download all sources to the "\texttt{dl}"

-directory and will start patching and compiling them in the "\texttt{build\_\textit{<arch>}}"
+directory and will start patching and compiling them in the "\texttt{build\_dir/\textit{<arch>}}"

 directory. When finished, the resulting firmware will be in the "\texttt{bin}" directory
 and packages will be in the "\texttt{bin/packages}" directory.
 
 directory. When finished, the resulting firmware will be in the "\texttt{bin}" directory
 and packages will be in the "\texttt{bin/packages}" directory.
 


@@ -202,12 +204,6 @@ simplifies the entire ordeal.
 Here for example, is \texttt{package/bridge/Makefile}:
 
 \begin{Verbatim}[frame=single,numbers=left]
 Here for example, is \texttt{package/bridge/Makefile}:
 
 \begin{Verbatim}[frame=single,numbers=left]

-#
-# Copyright (C) 2006 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#

 # $Id: Makefile 5624 2006-11-23 00:29:07Z nbd $
 
 include $(TOPDIR)/rules.mk
 # $Id: Makefile 5624 2006-11-23 00:29:07Z nbd $
 
 include $(TOPDIR)/rules.mk


@@ -229,12 +225,14 @@ define Package/bridge
   SECTION:=net
   CATEGORY:=Base system
   TITLE:=Ethernet bridging configuration utility
   SECTION:=net
   CATEGORY:=Base system
   TITLE:=Ethernet bridging configuration utility

-  DESCRIPTION:=\
-    Manage ethernet bridging: a way to connect networks together to \\\
-    form a larger network.

   URL:=http://bridge.sourceforge.net/
 endef
 
   URL:=http://bridge.sourceforge.net/
 endef
 

+define Package/bridge/description
+  Manage ethernet bridging: 
+  a way to connect networks together to form a larger network.
+endef
+

 define Build/Configure
     $(call Build/Configure/Default, \
         --with-linux-headers="$(LINUX_DIR)" \
 define Build/Configure
     $(call Build/Configure/Default, \
         --with-linux-headers="$(LINUX_DIR)" \


@@ -346,6 +344,19 @@ directly as the Nth argument to \texttt{BuildPackage}.
           Contains all environment variables that are passed to the make command
    \end{itemize}
 
           Contains all environment variables that are passed to the make command
    \end{itemize}
 

+\textbf{\texttt{Build/InstallDev} (optional):} \\
+       If your package provides a library that needs to be made available to other packages,
+       you can use the \texttt{Build/InstallDev} template to copy it into the staging directory
+       which is used to collect all files that other packages might depend on at build time.
+       When it is called by the build system, two parameters are passed to it. \texttt{\$(1)} points to
+       the regular staging dir, typically \texttt{staging\_dir/\textit{ARCH}}, while \texttt{\$(2)} points
+       to \texttt{staging\_dir/host}. The host staging dir is only used for binaries, which are
+       to be executed or linked against on the host and its \texttt{bin/} subdirectory is included
+       in the \texttt{PATH} which is passed down to the build system processes.
+       Please use \texttt{\$(1)} and \texttt{\$(2)} here instead of the build system variables
+       \texttt{\$(STAGING\_DIR)} and \texttt{\$(STAGING\_DIR\_HOST)}, because the build system behavior
+       when staging libraries might change in the future to include automatic uninstallation.
+

 \textbf{\texttt{Package/\textit{<name>}/install}:} \\
    A set of commands to copy files out of the compiled source and into the ipkg
    which is represented by the \texttt{\$(1)} directory. Note that there are currently
 \textbf{\texttt{Package/\textit{<name>}/install}:} \\
    A set of commands to copy files out of the compiled source and into the ipkg
    which is represented by the \texttt{\$(1)} directory. Note that there are currently


@@ -384,12 +395,6 @@ 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]
 Here for instance the Makefile for the I2C subsytem kernel modules :
 
 \begin{Verbatim}[frame=single,numbers=left]

-#
-# Copyright (C) 2006 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#

 # $Id $
 
 I2CMENU:=I2C Bus
 # $Id $
 
 I2CMENU:=I2C Bus


@@ -398,8 +403,7 @@ define KernelPackage/i2c-core
   TITLE:=I2C support
   DESCRIPTION:=Kernel modules for i2c support
   SUBMENU:=$(I2CMENU)
   TITLE:=I2C support
   DESCRIPTION:=Kernel modules for i2c support
   SUBMENU:=$(I2CMENU)

-  KCONFIG:=$(CONFIG_I2C_CORE) \
-        $(CONFIG_I2C_DEV)
+  KCONFIG:=CONFIG_I2C_CORE CONFIG_I2C_DEV

   FILES:=$(MODULES_DIR)/kernel/drivers/i2c/*.$(LINUX_KMOD_SUFFIX)
   AUTOLOAD:=$(call AutoLoad,50,i2c-core i2c-dev)
 endef
   FILES:=$(MODULES_DIR)/kernel/drivers/i2c/*.$(LINUX_KMOD_SUFFIX)
   AUTOLOAD:=$(call AutoLoad,50,i2c-core i2c-dev)
 endef


@@ -459,14 +463,14 @@ shortcuts you can take. Instead of waiting for make to get to your package, you
 run one of the following:
 
 \begin{itemize}
 run one of the following:
 
 \begin{itemize}

-    \item \texttt{make package/\textit{<name>}-clean V=99}
-    \item \texttt{make package/\textit{<name>}-install V=99}
+    \item \texttt{make package/\textit{<name>}/clean V=99}
+    \item \texttt{make package/\textit{<name>}/install V=99}

 \end{itemize}
 
 \end{itemize}
 

-Another nice trick is that if the source directory under \texttt{build\_\textit{<arch>}}
+Another nice trick is that if the source directory under \texttt{build\_dir/\textit{<arch>}}

 is newer than the package directory, it won't clobber it by unpacking the sources again.
 If you were working on a patch you could simply edit the sources under the
 is newer than the package directory, it won't clobber it by unpacking the sources again.
 If you were working on a patch you could simply edit the sources under the

-\texttt{build\_\textit{<arch>}/\textit{<source>}} directory and run the install command above,
+\texttt{build\_dir/\textit{<arch>}/\textit{<source>}} directory and run the install command above,

 when satisfied, copy the patched sources elsewhere and diff them with the unpatched
 sources. A warning though - if you go modify anything under \texttt{package/\textit{<name>}}
 it will remove the old sources and unpack a fresh copy.
 when satisfied, copy the patched sources elsewhere and diff them with the unpatched
 sources. A warning though - if you go modify anything under \texttt{package/\textit{<name>}}
 it will remove the old sources and unpack a fresh copy.


@@ -474,8 +478,8 @@ it will remove the old sources and unpack a fresh copy.
 Other useful targets include:
 
 \begin{itemize}
 Other useful targets include:
 
 \begin{itemize}

-    \item \texttt{make package/\textit{<name>}-prepare V=99}
-    \item \texttt{make package/\textit{<name>}-compile V=99}
-    \item \texttt{make package/\textit{<name>}-configure V=99}
+    \item \texttt{make package/\textit{<name>}/prepare V=99}
+    \item \texttt{make package/\textit{<name>}/compile V=99}
+    \item \texttt{make package/\textit{<name>}/configure V=99}

 \end{itemize}
 
 \end{itemize}