This is more a installation scrapbook from the OOBD team themself as anything the normal developer need to be worried about, so just forget this page

The package under Ubuntu 14.04 is too old (1.10), but we'll need 1.12.1 to have the fastcomp compiler active. The older version generates a 'undefined setjmp()' error

So download the actual SDK and build it locally.

Download the actual lua archive (http://www.lua.org/ftp/). Keep in mind that OOBD (actual) still uses the older lua 5.1 system. Unpack the archive and do some modifications in the make files:

in main Makefile, add a new target (emcc):

# Convenience platforms targets.
PLATS= aix ansi bsd freebsd generic linux macosx mingw posix solaris emcc

In scr/Makefile

replace the gcc compiler against emcc

CC= emcc

make a note of the compiler flags, which are used (e.g. -O2 -Wall), as they are used again later.

Make sure not to use the -DLUA_USE_POSIX directive, because it makes the compiler to use _setjmp/_longjmp instead a “normal” setjmp/longjmp, which fails later when you run the .js result….

comment the LIBS directive, as it seems not to be used and creates a warning

# LIBS= -lm $(MYLIBS)

creates a new target with only luac, but without lua itself

ALL_C= $(LUA_A) $(LUAC_T)
comp:   $(ALL_C)

Add the new defined target as emcc build target

      
emcc:
      $(MAKE) comp MYCFLAGS=

Start the build process

emmake make emcc

change into the source dir

cd src/

build luac.js

emcc -O2 -Wall  -o luac.js  luac.o print.o liblua.a

test it

nodejs luac.js

build html wrapper

emcc -o luac.html  luac.o print.o liblua.a

and load it via local webserver (php -S localhost:8000) into browser for testing

cp blockly_compressed.js blockly_uncompressed.js lua_compressed.js ../web/blockly/