Commonlize xtest compilation among all platforms

This is the first patch of a serie that show how makefile for specific
platform support may use common rules. comon.mk is introduced. It contains:
- common variable definitions, such as the compilers
- common git to use and path (typically the OP-TEE ones)
- common macros (CCACHE, and others to come).

Signed-off-by: Pascal Brand <pascal.brand@st.com>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
5 files changed
tree: ac21e6d98fce568a05d13f965fd6fa859f41752a
  1. .gitignore
  2. common.mk
  3. fvp.mk
  4. hikey.mk
  5. mediatek.mk
  6. qemu-check.exp
  7. qemu.mk
  8. README.md
  9. toolchain.mk
README.md

Contains the necessary build files to handle OP-TEE for various setups, for now, please see manifest/README.md and OP-TEE/README.md for instructions.