3.2. Library Configurations
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## 3.2. Library Configurations

Sourcery G++ Lite for ARM uClinux includes the following library configuration.

ARMv4T - Little-Endian, Soft-Float
Command-line option(s): | default
Sysroot subdirectory: | `./`

ARMv6-M Thumb - Little-Endian, Soft-Float
Command-line option(s): | `-mthumb -march=armv6-m`
Sysroot subdirectory: | `armv6-m/`

ARMv7 Thumb-2 - Little-Endian, Soft-Float
Command-line option(s): | `-mthumb -march=armv7 -mfix-cortex-m3-ldrd`
Sysroot subdirectory: | `thumb2/`

Sourcery G++ includes copies of run-time libraries that have been built with optimizations for different target architecture variants or other sets of build options. Each such set of libraries is referred to as a multilib. When you link a target application, Sourcery G++ selects the multilib matching the build options you have selected.

Each multilib corresponds to a sysroot directory which contains the files that should be installed on the target system. You can find the sysroot directories provided with Sourcery G++ in the `arm-uclinuxeabi/libc` directory of your installation.

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