SOFTWARE REQUIREMENTS
- Compiling and running uClibc requires Linux kernel header files.
- uClibc will be compiled to match the interfaces available in the
- provided version of the Linux kernel headers. Linux kernel version
- 2.0, version 2.2, and version 2.4 are known to work. Other kernel
- versions may work but havn't been tested. Its also helpful to have
- a working version of GNU binutils, and GNU gcc -- using excessively
- old versions of these packages can cause very strange errors that
- are difficult to find and fix.
+ Compiling uClibc requires Linux kernel header files. uClibc will
+ be compiled to match the interfaces available in the provided
+ version of the Linux kernel headers. Linux kernel version 2.0,
+ version 2.2, version 2.4 and version 2.6 are known to work. Other
+ kernel versions may work but havn't been tested. Its also helpful
+ to have a working version of GNU binutils, and GNU gcc -- using
+ excessively old versions of these packages can cause very strange
+ errors that are difficult to find and fix.
CONFIGURING uClibc:
- - Check the Rules.mak file and adjust CROSS to specify your cross-
- compiler if you are cross compiling.
-
- Use must have a valid configuration file to compile uClibc. Do not
skip this step. New configuration options are added in each
- release, and odd problems will turn up if your configuration file
- is not set up as expected. If you want to carry your existing
- configuration to a new version with minimal work, use "make
- oldconfig", which will only ask you for the answers to new
- questions.
+ release, and odd configuration options are sometimes removed.
+ To configure uClibc, you can run:
+
+ make menuconfig
+ or
+ make config
+
+ If you have an existing .config file, you can update this file
+ using the
+
+ make oldconfig
- - Available configuration commands are:
+ command, which will only ask you about new configuration options.
+
+ Available configuration commands are:
+ "make config" Text based configuration, no menus or colors.
"make menuconfig" Text based color menus, radiolists & dialogs.
"make oldconfig" Default all questions based on the contents of
your existing ./.config file.
"make allyesconfig" Set all values to "yes" for all options.
"make allnoconfig" Set all values to "no" for all options.
- - uClibc does not have proper dependancy checking (yet) so if you
- change your uClibc configuration, you must current rebuild the
- entire library, by first running 'make clean'.
COMPILING uClibc:
- - Once you have a valid configuration file, just run 'make' to compile
- uClibc.
+ - uClibc does not have proper dependancy checking (yet) so if you
+ change your uClibc configuration, you must current rebuild the
+ entire library, by first running
+
+ make clean
+ - Once you have a valid configuration file, just run
+ make
-INSTALLING the uClibc development environment:
+ to compile uClibc. or if you are cross compiling, you would
+ instead run something like:
- - As root, if necessary, run:
+ make CROSS=arm-linux-
- make install
- This will install the header files, libraries, and the gcc wrapper
- into the directories defined in Config.
+INSTALLING the uClibc development environment:
-INSTALLING the uClibc target runtime environment:
-
- - As root, if necessary, run:
+ - As root, if necessary, run something like:
- make PREFIX=<temporary path> install_target
+ make PREFIX=<some path> install
- This will install only the files that are necessary to run
- binaries compiled against uClibc. Hint: You probably do not want
- to install the target runtime environment into /lib on your host
- machine.
+ This will install the uClibc runtime and development system (i.e.
+ all the header files, libraries, etc) into the directories defined
+ within your .config file.
USING uClibc:
- - To compile programs with uClibc,
-
- export PATH={uClibc DEVEL_PREFIX}/bin:$PATH
-
- and then just run './configure' and 'make' as usual.
-
-Note:
-
- You may also want to look at extra/gcc-uclibc/gcc-uclibc.c for
- additional information concerning what options and environment
- variables the gcc wrapper handles.
+ - To compile programs with uClibc you will need a complete toolchain
+ (i.e. binutils, gcc, and uClibc) that was built expressly for use
+ with uClibc.
+
+ - Native and cross compiling toolchains, as well as makefiles for creating
+ uClibc toolchains, are available from the uClibc website. You may want
+ to check out "buildroot", which is available from the uClibc download area,
+ which provides examples of how to build your own uClibc based system.
+
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