User:Silviof/cmake for crosscompile

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[edit] environmentsetup

• create environment file, called "$LOCATION/cmake-openmoko.txt"

# this one is important
SET(CMAKE_SYSTEM_NAME Linux)
#this one not so much
SET(CMAKE_SYSTEM_VERSION 1)

# specify the cross compiler
SET(CMAKE_C_COMPILER   /usr/local/openmoko/arm/bin/arm-angstrom-linux-gnueabi-gcc)
SET(CMAKE_CXX_COMPILER /usr/local/openmoko/arm/bin/arm-angstrom-linux-gnueabi-g++)

# where is the target environment 
SET(CMAKE_FIND_ROOT_PATH /usr/local/openmoko/arm/arm-angstrom-linux-gnueabi)

# search for programs in the build host directories
SET(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
# for libraries and headers in the target directories
SET(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
SET(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

[edit] crosscompile with cmake

cmake -DCMAKE_TOOLCHAIN_FILE=$LOCATION/cmake-openmoko.txt