View source for Cross compiling standalone packages for the camera

This procedure is intended to test software before taking time to include it in the firmware build,

or to build software that would be too big to fit into the firmware image.

=First=
you have to source init_env from the elphel firmware source directory, eg:
 source /usr/local/src/elphel-cvs/353/elphel353/init_env

=Setting environment variables=
(check ./configure --help and the Makefile to see if more is needed)

 # toolchain
 TOOLCHAIN=/usr/local/cris
 export PATH=${TOOLCHAIN}/crisv32-axis-linux-gnu/bin:$PATH 
 export PATH=${TOOLCHAIN}/bin:$PATH 
 
 # binaries
 export CC=${TOOLCHAIN}/bin/crisv32-axis-linux-gnu-gcc
 export CXX=${TOOLCHAIN}/bin/crisv32-axis-linux-gnu-g++
 export CPP=${TOOLCHAIN}/bin/crisv32-axis-linux-gnu-cpp
 
 # options
 export CFLAGS=-I${TOOLCHAIN}/include
 export CFLAGS="${CFLAGS} -I${TOOLCHAIN}/crisv32-axis-linux-gnu/sys-include"
 export CXXFLAGS=${CFLAGS}
 export CPPFLAGS=${CFLAGS}
 export LDFLAGS=-L${TOOLCHAIN}/lib
 export LDFLAGS="${LDFLAGS} -L${TOOLCHAIN}/crisv32-axis-linux-gnu/lib/"
 
 # user includes and libraries
 export LDFLAGS="${LDFLAGS} -L/usr/local/crisv32/lib"
 export CFLAGS="${CFLAGS} -I/usr/local/crisv32/include"
 export CXXFLAGS=${CFLAGS}

=When the software is packaged using autoconf and automake=
You normally just have to run:
 ./configure --host=crisv32-axis-linux-gnu --prefix=/usr/local/crisv32  [ other options ]
 make
 make install

and mount or copy the resulting /usr/local/crisv32 to the camera
(you may want to strip binaries and remove documentation before)

Then to run the software on the camera you may have to define:
 export PATH=/usr/local/crisv32/bin:$PATH
 export LD_LIBRARY_PATH=/usr/local/crisv32/lib:$LD_LIBRARY_PATH

=When the software is not packaged using autoconf and automake=
Edit the Makefile