path: root/docs
diff options
authorGravatar Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2013-10-06 16:19:12 +0200
committerGravatar Peter Korsgaard <peter@korsgaard.com>2013-10-06 20:53:58 +0200
commitd191c916272fcbac2fd12c4a064530743139dfe5 (patch)
treeca49f8375644420b6e77c960d4c4a999de147b33 /docs
parentf742fe440797ef345266845a14c6c65a86e3af4c (diff)
docs: update manual after Crosstool-NG backend removal
[Peter: remove a few more ctng references in customize-store.txt] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Diffstat (limited to 'docs')
5 files changed, 14 insertions, 84 deletions
diff --git a/docs/manual/configure.txt b/docs/manual/configure.txt
index 56b04696d2..8912a81560 100644
--- a/docs/manual/configure.txt
+++ b/docs/manual/configure.txt
@@ -47,8 +47,7 @@ target system uses ARM, the regular compilation toolchain on your host
runs on x86 and generates code for x86, while the cross-compilation
toolchain runs on x86 and generates code for ARM.
-Buildroot provides different solutions to build, or use existing
-cross-compilation toolchains:
+Buildroot provides two solutions for the cross-compilation toolchain:
* The *internal toolchain backend*, called +Buildroot toolchain+ in
the configuration interface.
@@ -56,10 +55,7 @@ cross-compilation toolchains:
* The *external toolchain backend*, called +External toolchain+ in
the configuration interface.
- * The *Crosstool-NG toolchain backend*, called +Crosstool-NG
- toolchain+ in the configuration interface.
-The choice between these three solutions is done using the +Toolchain
+The choice between these two solutions is done using the +Toolchain
Type+ option in the +Toolchain+ menu. Once one solution has been
chosen, a number of configuration options appear, they are detailed in
the following sections.
@@ -76,8 +72,8 @@ This backend is the historical backend of Buildroot, and has been
limited for a long time to the usage of the
http://www.uclibc.org[uClibc C library]. Support for the _eglibc_ C
library has been added in 2013 and is at this point considered
-experimental. See the _External toolchain backend_ and _Crosstool-NG
-toolchain backend_ for other solutions to use _glibc_ or _eglibc_.
+experimental. See the _External toolchain backend_ for another
+solution to use _glibc_ or _eglibc_.
Once you have selected this backend, a number of options appear. The
most important ones allow to:
@@ -242,54 +238,6 @@ Drawbacks of this backend:
fix from the toolchain vendor, unless you build your external
toolchain by yourself using Crosstool-NG.
-Crosstool-NG toolchain backend
-The _Crosstool-NG toolchain backend_ integrates the
-http://crosstool-ng.org[Crosstool-NG] project with
-Buildroot. Crosstool-NG is a highly-configurable, versatile and
-well-maintained tool to build cross-compilation toolchains.
-If you select the +Crosstool-NG toolchain+ option in +Toolchain Type+,
-then you will be offered to:
- * Choose which C library you want to use. Crosstool-NG supports the
- three most important C libraries used in Linux systems: glibc,
- eglibc and uClibc
- * Choose a custom Crosstool-NG configuration file. Buildroot has its
- own default configuration file (one per C library choice), but you
- can provide your own. Another option is to run +make
- ctng-menuconfig+ to get access to the Crosstool-NG configuration
- interface. However, note that all Buildroot packages have only been
- tested with the default Crosstool-NG configurations.
- * Choose a number of toolchain options (rather limited if glibc or
- eglibc are used, or numerous if uClibc is used)
-When you will start the Buildroot build process, Buildroot will
-download and install the Crosstool-NG tool, build and install its
-required dependencies, and then run Crosstool-NG with the provided
-Advantages of this backend:
-* Not limited to uClibc: glibc and eglibc are supported.
-* Vast possibilities of toolchain configuration.
-Drawbacks of this backend:
-* Crosstool-NG is not perfectly integrated with Buildroot. For
- example, Crosstool-NG has its own download infrastructure, not
- integrated with the one in Buildroot (for example a Buildroot +make
- source+ will not download all the source code tarballs needed by
- Crosstool-NG).
-* The toolchain is completely rebuilt from scratch if you do a +make
- clean+.
/dev management
diff --git a/docs/manual/customize-store.txt b/docs/manual/customize-store.txt
index 5083339ec0..8fb5b57bb5 100644
--- a/docs/manual/customize-store.txt
+++ b/docs/manual/customize-store.txt
@@ -42,13 +42,14 @@ Alternatively, you can copy the file to any other place and rebuild with
Other package configuration
-The configuration files for busybox, the linux kernel, barebox, uClibc and
-crosstool-NG should be stored as well if changed. For each of these, a
-buildroot configuration option exists to point to an input configuration
-file, e.g. +BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE+. To save their
-configuration, set those configuration options to a path outside
-your output directory, e.g. +board/<manufacturer>/<boardname>/linux.config+.
-Then, copy the configuration files to that path.
+The configuration files for busybox, the linux kernel, barebox and
+uClibc should be stored as well if changed. For each of these, a
+buildroot configuration option exists to point to an input
+configuration file, e.g. +BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE+. To
+save their configuration, set those configuration options to a path
+outside your output directory,
+e.g. +board/<manufacturer>/<boardname>/linux.config+. Then, copy the
+configuration files to that path.
Make sure that you create a configuration file 'before' changing
the +BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE+ etc. options. Otherwise,
@@ -70,9 +71,8 @@ configuration files easier.
path specified by +BR2_UCLIBC_CONFIG+.
* +make barebox-update-defconfig+ saves the barebox configuration to the
-* For crosstool-NG and at91bootstrap3, no helper exists so you
- have to copy the config file manually to +BR2_TOOLCHAIN_CTNG_CONFIG+,
+* For at91bootstrap3, no helper exists so you have to copy the config
@@ -130,14 +130,12 @@ you can skip the steps that are not relevant for your use case.
(as far as they are relevant):
1. Write the configuration files:
* +make linux-update-defconfig+
* +make busybox-update-config+
- * +cp <output>/build/build-toolchain/.config board/<manufacturer>/<boardname>/ctng.config+
* +make uclibc-update-config+
* +cp <output>/build/at91bootstrap3-*/.config board/<manufacturer>/<boardname>/at91bootstrap3.config+
* +make barebox-update-defconfig+
diff --git a/docs/manual/customize-toolchain.txt b/docs/manual/customize-toolchain.txt
index 82ecc28431..841dbfd0c4 100644
--- a/docs/manual/customize-toolchain.txt
+++ b/docs/manual/customize-toolchain.txt
@@ -44,15 +44,3 @@ However, it allows to tune major settings, such as:
These settings are available after selecting the +Buildroot toolchain+ type in
the menu +Toolchain+.
-Using the Crosstool-NG backend
-The http://crosstool-ng.org[crosstool-NG] toolchain backend enables a rather
-limited set of settings under the Buildroot +Toolchain+ menu:
-* The http://crosstool-ng.org[crosstool-NG] configuration file
-* Gdb and some toolchain options
-Then, the toolchain can be fine-tuned by invoking +make ctng-menuconfig+.
diff --git a/docs/manual/make-tips.txt b/docs/manual/make-tips.txt
index c3fd155721..31a88bf0b0 100644
--- a/docs/manual/make-tips.txt
+++ b/docs/manual/make-tips.txt
@@ -36,8 +36,6 @@ some settings in the +.config+ file may hide some targets:
+linux+ is enabled;
* +uclibc-menuconfig+ is only available when the
Buildroot internal toolchain backend is used;
-* +ctng-menuconfig+ is only available when the
- crosstool-NG backend is used;
* +barebox-menuconfig+ and +barebox-savedefconfig+ only work when the
+barebox+ bootloader is enabled.
diff --git a/docs/manual/rebuilding-packages.txt b/docs/manual/rebuilding-packages.txt
index 044c908962..88d667015d 100644
--- a/docs/manual/rebuilding-packages.txt
+++ b/docs/manual/rebuilding-packages.txt
@@ -17,8 +17,6 @@ In some cases, a full rebuild is mandatory:
** after changing any toolchain option under the _Toolchain_ menu (if
the internal Buildroot backend is used);
-** after running +make ctng-menuconfig+ (if the crosstool-NG backend
- is used);
** after running +make uclibc-menuconfig+.
* after removing some libraries from the package selection.