Building from Source - grisp/otp GitHub Wiki

Prerequisites

grisp/grisp-software checked out and built according to the README
grisp/otp (this repository) with the branch peerst/grisp-patches checked out

Build

Change directory to the otp checkout
```
$ cd otp
```
Set the GRISP_TC_ROOT environment variable to point to the absolute path of the built grisp-software toolchain:
```
$ export GRISP_TC_ROOT=/absolute/path/to/grisp-software/rtems-install/rtems-4.12
```
Set your path to include the toolchain binaries:
```
$ export PATH=$GRISP_TC_ROOT/bin:$PATH
```
Prepare autoconf
```
$ ./otp_build autoconf
```

Run configure

$ ./otp_build configure --xcomp-conf=xcomp/erl-xcomp-arm-rtems.conf --disable-threads --prefix=/otp

Build the bootstrap system
```
$ ./otp_build boot -a
```
After a successful build, the file bin/arm-unknown-rtems4.12/beam is the elf executable. To get the file to boot from the SD-card one needs to run objcopy to make a raw binary out of the elf file since that is what the bootloader expects:
```
$ arm-rtems4.12-objcopy -O binary bin/arm-unknown-rtems4.12/beam /path/to/SDcard/beam.bin
```

Create and set a temporary install directory (only needed the first time):

$ mktemp -d
/var/folders/j2/fl737lzx5y5_3gn97sg_m9r40000gn/T/tmp.GtwzJaJp
$ export INSTALLDIR=/var/folders/j2/fl737lzx5y5_3gn97sg_m9r40000gn/T/tmp.GtwzJaJp

Remove previous build:
```
$ rm -rf $INSTALLDIR/otp
```
Build OTP to the install directory:
```
$ make install DESTDIR=$INSTALLDIR
```

However this doesn't do the install in a way that makes the paths correct. To fix this, move everything up two levels:

$ cd $INSTALLDIR/otp
$ mv lib{,.old}      # move aside since we create a new lib next
$ mv lib.old/erlang/* .
$ rm -rf lib.old

Copy the beam files to the SD card.

$ cd $INSTALLDIR
$ cp -r otp /path/to/SDcard/

Miscellaneous

Package OTP as EZ Archives

This could be used to speed up access or at least minimize the number of files to be read from the SD-card.

Start an Erlang shell in the OTP installation directory:
```
$ cd $INSTALLDIR/otp/lib
$ erl
```

List all applications and create Erlang archive files for them:

1> {ok, D} = file:list_dir(".").
2> Ez = fun(F) -> zip:create(F ++ ".ez", [F], [{compress, all},{uncompress, [".beam",".app"]}]) end.
3> [Ez(F) | F <- D].