SOFTWARE REQUIREMENTS
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SOFTWARE REQUIREMENTS
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Compiling uClibc requires Linux kernel header files. uClibc will
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Compiling uClibc requires Linux kernel header files. uClibc will
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be compiled to match the interfaces available in the provided
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be compiled to match the interfaces available in the provided
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version of the Linux kernel headers. Linux kernel version 2.0,
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version of the Linux kernel headers. Linux kernel version 2.0,
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version 2.2, version 2.4 and version 2.6 are known to work. Other
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version 2.2, version 2.4 and version 2.6 are known to work. Other
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kernel versions may work but havn't been tested. Its also helpful
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kernel versions may work but havn't been tested. Its also helpful
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to have a working version of GNU binutils, and GNU gcc -- using
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to have a working version of GNU binutils, and GNU gcc -- using
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excessively old versions of these packages can cause very strange
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excessively old versions of these packages can cause very strange
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errors that are difficult to find and fix.
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errors that are difficult to find and fix.
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CONFIGURING uClibc:
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CONFIGURING uClibc:
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- Use must have a valid configuration file to compile uClibc. Do not
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- Use must have a valid configuration file to compile uClibc. Do not
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skip this step. New configuration options are added in each
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skip this step. New configuration options are added in each
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release, and odd configuration options are sometimes removed.
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release, and odd configuration options are sometimes removed.
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To configure uClibc, you can run:
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To configure uClibc, you can run:
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make menuconfig
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make menuconfig
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or
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or
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make config
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make config
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If you have an existing .config file, you can update this file
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If you have an existing .config file, you can update this file
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using the
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using the
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make oldconfig
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make oldconfig
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command, which will only ask you about new configuration options.
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command, which will only ask you about new configuration options.
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Available configuration commands are:
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Available configuration commands are:
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"make config" Text based configuration, no menus or colors.
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"make config" Text based configuration, no menus or colors.
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"make menuconfig" Text based color menus, radiolists & dialogs.
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"make menuconfig" Text based color menus, radiolists & dialogs.
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"make oldconfig" Default all questions based on the contents of
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"make oldconfig" Default all questions based on the contents of
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your existing ./.config file.
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your existing ./.config file.
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"make defconfig" Use defaults for all options.
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"make defconfig" Use defaults for all options.
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"make randconfig" Use random values for all options.
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"make randconfig" Use random values for all options.
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"make allyesconfig" Set all values to "yes" for all options.
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"make allyesconfig" Set all values to "yes" for all options.
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"make allnoconfig" Set all values to "no" for all options.
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"make allnoconfig" Set all values to "no" for all options.
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COMPILING uClibc:
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COMPILING uClibc:
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- uClibc does not have proper dependancy checking (yet) so if you
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- uClibc does not have proper dependancy checking (yet) so if you
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change your uClibc configuration, you must current rebuild the
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change your uClibc configuration, you must current rebuild the
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entire library, by first running
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entire library, by first running
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make clean
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make clean
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- Once you have a valid configuration file, just run
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- Once you have a valid configuration file, just run
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make
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make
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to compile uClibc. or if you are cross compiling, you would
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to compile uClibc. or if you are cross compiling, you would
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instead run something like:
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instead run something like:
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make CROSS=arm-linux-
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make CROSS=arm-linux-
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INSTALLING the uClibc development environment:
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INSTALLING the uClibc development environment:
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- As root, if necessary, run something like:
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- As root, if necessary, run something like:
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make PREFIX= install
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make PREFIX= install
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This will install the uClibc runtime and development system (i.e.
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This will install the uClibc runtime and development system (i.e.
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all the header files, libraries, etc) into the directories defined
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all the header files, libraries, etc) into the directories defined
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within your .config file.
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within your .config file.
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USING uClibc:
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USING uClibc:
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- To compile programs with uClibc you will need a complete toolchain
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- To compile programs with uClibc you will need a complete toolchain
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(i.e. binutils, gcc, and uClibc) that was built expressly for use
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(i.e. binutils, gcc, and uClibc) that was built expressly for use
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with uClibc.
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with uClibc.
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- Native and cross compiling toolchains, as well as makefiles for creating
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- Native and cross compiling toolchains, as well as makefiles for creating
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uClibc toolchains, are available from the uClibc website. You may want
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uClibc toolchains, are available from the uClibc website. You may want
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to check out "buildroot", which is available from the uClibc download area,
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to check out "buildroot", which is available from the uClibc download area,
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which provides examples of how to build your own uClibc based system.
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which provides examples of how to build your own uClibc based system.
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