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docs/manual: update informations about C library in internal backend

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Now that we have eglibc and glibc support in the internal backend, and
no longer marked as experimental, a little bit of rewording is
needed. It is no longer necessary to indicate that uClibc was
historically supported as the only C library, and that the glibc
support is experimental. We also update the rest of the description to
be less uClibc specific.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni 2014-02-23 16:04:33 +01:00 committed by Peter Korsgaard
parent 43f25ee055
commit ba4146c37c
1 changed files with 11 additions and 19 deletions
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30
docs/manual/configure.txt
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@ -68,12 +68,10 @@ The _internal toolchain backend_ is the backend where Buildroot builds
by itself a cross-compilation toolchain, before building the userspace by itself a cross-compilation toolchain, before building the userspace
applications and libraries for your target embedded system. applications and libraries for your target embedded system.
This backend is the historical backend of Buildroot, and has been This backend supports several C libraries:
limited for a long time to the usage of the http://www.uclibc.org[uClibc], the
http://www.uclibc.org[uClibc C library]. Support for the _eglibc_ C http://www.gnu.org/software/libc/libc.html[glibc] and
library has been added in 2013 and is at this point considered http://www.eglibc.org[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 Once you have selected this backend, a number of options appear. The
most important ones allow to: most important ones allow to:
@ -96,18 +94,7 @@ most important ones allow to:
the C library might be using interfaces that are not provided by the C library might be using interfaces that are not provided by
your Linux kernel. your Linux kernel.
* Change the version and the configuration of the uClibc C library * Change the version of the GCC compiler, binutils and the C library.
(if uClibc is selected). The default options are usually
fine. However, if you really need to specifically customize the
configuration of your uClibc C library, you can pass a specific
configuration file here. Or alternatively, you can run the +make
uclibc-menuconfig+ command to get access to uClibc's configuration
interface. Note that all packages in Buildroot are tested against
the default uClibc configuration bundled in Buildroot: if you
deviate from this configuration by removing features from uClibc,
some packages may no longer build.
* Change the version of the GCC compiler and binutils.
* Select a number of toolchain options (uClibc only): whether the * Select a number of toolchain options (uClibc only): whether the
toolchain should have largefile support (i.e support for files toolchain should have largefile support (i.e support for files
@ -118,7 +105,12 @@ most important ones allow to:
libraries visible in Buildroot menus will change: many applications libraries visible in Buildroot menus will change: many applications
and libraries require certain toolchain options to be enabled. Most and libraries require certain toolchain options to be enabled. Most
packages show a comment when a certain toolchain option is required packages show a comment when a certain toolchain option is required
to be able to enable those packages. to be able to enable those packages. If needed, you can further
refine the uClibc configuration by running +make
uclibc-menuconfig+. Note however that all packages in Buildroot are
tested against the default uClibc configuration bundled in
Buildroot: if you deviate from this configuration by removing
features from uClibc, some packages may no longer build.
It is worth noting that whenever one of those options is modified, It is worth noting that whenever one of those options is modified,
then the entire toolchain and system must be rebuilt. See then the entire toolchain and system must be rebuilt. See