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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.
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.
- Available configuration commands are:
"make menuconfig" Text based color menus, radiolists & dialogs.
"make oldconfig" Default all questions based on the contents of
your existing ./.config file.
"make defconfig" Use defaults for all options.
"make randconfig" Use random values for all options.
"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.
INSTALLING the uClibc development environment:
- As root, if necessary, run:
make install
This will install the header files, libraries, and the gcc wrapper
into the directories defined in Config.
INSTALLING the uClibc target runtime environment:
- As root, if necessary, run:
make PREFIX=<temporary path> install_target
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.
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.
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