Cross Compile from Linux to Arm-Elf (Arm926Ej-S/Mt7108)

Cross compile from linux to ARM-ELF (ARM926EJ-S/MT7108)

apt-cache search arm | grep ^gcc- gives the following list,

1. gcc-4.7-aarch64-linux-gnu - GNU C compiler
2. gcc-4.7-arm-linux-gnueabi - GNU C compiler
3. gcc-4.7-arm-linux-gnueabi-base - GCC, the GNU Compiler Collection (base package)
4. gcc-4.7-arm-linux-gnueabihf - GNU C compiler
5. gcc-4.7-arm-linux-gnueabihf-base - GCC, the GNU Compiler Collection (base package)
6. gcc-4.7-multilib-arm-linux-gnueabi - GNU C compiler (multilib files)
7. gcc-4.7-multilib-arm-linux-gnueabihf - GNU C compiler (multilib files)
8. gcc-aarch64-linux-gnu - The GNU C compiler for arm64 architecture
9. gcc-arm-linux-gnueabi - The GNU C compiler for armel architecture
10. gcc-arm-linux-gnueabihf - The GNU C compiler for armhf architecture

You should install gcc-arm-linux-gnueabi which is an alias for gcc-4.7-arm-linux-gnueabi. gcc-4.7-multilib-arm-linux-gnueabi is also possible, but more complicated. Use the flags, -march=armv5te -mtune=arm926ej-s -msoft-float -mfloat-abi=soft. You can do more tuning by specifying the --param NAME=VALUE option to gcc with parameters tuned to your systems memory sub-system timing.

You may not be able to use these gcc versions as your Linux maybe compiled with OABI and/or be quite ancient compared to the one the compiler was built for. In some cases, the libc will call a newer Linux API, which may not be present. If the compiler/libc was not configured to be backwards compatible, then it may not work with your system. You can use crosstool-ng to create a custom compiler that is built to suit your system, but this is much more complex.

Making use of -mfloat-abi=hard and -mfpu=vfp/neon Codesourcery Lite 2013.05-24

The Sourcery CodeBench Lite toolchain does not support armhf. Nor do the Academic or Personal editions.

You'll need to purchase the Standard or Professional editions to get that.

Alternatively, I believe the cross-compiler packages for Ubuntu support the configuration you need (in fact, only that configuration).

If you're not using Ubuntu, then the pre-built Linaro toolchains should be exactly what you need. (The Ubuntu cross compiler packages are/were also built by Linaro people, albeit using the Debian/Ubuntu-specific deb build system.)

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