SOFTWARE REQUIREMENTS Compiling uClibc-ng requires Linux kernel header files. uClibc-ng will be compiled to match the interfaces available in the provided version of the Linux kernel headers. Any modern Linux kernel is supported (3.x/4.x). 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. INSTALLING Linux kernel headers: Extract a Linux kernel source tree and create a populated headers directory: make INSTALL_HDR_PATH=/tmp/linux-headers headers_install CONFIGURING uClibc-ng: - Users must have a valid configuration file to compile uClibc-ng. Do not skip this step. New configuration options are added in each release, and odd configuration options are sometimes removed. To configure uClibc-ng, you can run: make menuconfig or make config You need to point in "Target Architecture Features and Options" the field "Linux kernel header location" to for example /tmp/linux-headers/include if you installed the headers to /tmp/linux-headers (Variable name KERNEL_HEADERS in .config). If you have an existing .config file, you can update this file using the make oldconfig 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 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. COMPILING uClibc-ng: - uClibc-ng does not have proper dependancy checking so if you change your uClibc-ng configuration, you must current rebuild the entire library, by first running make clean - Once you have a valid configuration file, just run make to compile uClibc-ng. or if you are cross compiling, you would instead run something like: make CROSS_COMPILE=arm-linux- INSTALLING the uClibc-ng development environment: - As root, if necessary, run something like: make PREFIX=<some path> install This will install the uClibc-ng runtime and development system (i.e. all the header files, libraries, etc) into the directories defined within your .config file. USING uClibc-ng: - To compile programs with uClibc-ng you will need a complete toolchain (i.e. binutils, gcc and uClibc-ng) that was built expressly for use with uClibc-ng. - You have following choices at the moment: - Use OpenADK from https://openadk.org - Use Buildroot from http://www.buildroot.org - Use Crosstool-NG from http://crosstool-ng.org - Use your own build scripts or environment