make -j4 error while building.. need help compiling

[eenallemaal]

on 14.04 trusty taher
sudo apt-get install emscripten llvm
sudo apt-get install cmake gcc autogen automake autotools git
git clone https://github.com/dreamlayers/em-dosbox.git
cd em-dosbox/
./autogen.sh
emconfigure ./configure
make -j4
when will i make it to sudo make install ????
help needed compiling
or the error explained

mv -f .deps/dos_misc.Tpo .deps/dos_misc.Po
/usr/share/emscripten/em++ -DHAVE_CONFIG_H -I. -I../.. -I../../include -O3 -s USE_SDL=2 -MT drives.o -MD -MP -MF .deps/drives.Tpo -c -o drives.o drives.cpp
mv -f .deps/dos_classes.Tpo .deps/dos_classes.Po
/usr/share/emscripten/em++ -DHAVE_CONFIG_H -I. -I../.. -I../../include -O3 -s USE_SDL=2 -MT drive_virtual.o -MD -MP -MF .deps/drive_virtual.Tpo -c -o drive_virtual.o drive_virtual.cpp
dos_programs.cpp:28:10: fatal error: 'emscripten/fetch.h' file not found
#include <emscripten/fetch.h>
^
mv -f .deps/dos_tables.Tpo .deps/dos_tables.Po
/usr/share/emscripten/em++ -DHAVE_CONFIG_H -I. -I../.. -I../../include -O3 -s USE_SDL=2 -MT drive_local.o -MD -MP -MF .deps/drive_local.Tpo -c -o drive_local.o drive_local.cpp
mv -f .deps/drives.Tpo .deps/drives.Po
/usr/share/emscripten/em++ -DHAVE_CONFIG_H -I. -I../.. -I../../include -O3 -s USE_SDL=2 -MT drive_cache.o -MD -MP -MF .deps/drive_cache.Tpo -c -o drive_cache.o drive_cache.cpp
mv -f .deps/drive_virtual.Tpo .deps/drive_virtual.Po
/usr/share/emscripten/em++ -DHAVE_CONFIG_H -I. -I../.. -I../../include -O3 -s USE_SDL=2 -MT drive_fat.o -MD -MP -MF .deps/drive_fat.Tpo -c -o drive_fat.o drive_fat.cpp
1 error generated.
ERROR root: compiler frontend failed to generate LLVM bitcode, halting
make[4]: *** [dos_programs.o] Error 1
make[4]: *** Waiting for unfinished jobs....
mv -f .deps/drive_local.Tpo .deps/drive_local.Po
mv -f .deps/drive_fat.Tpo .deps/drive_fat.Po
mv -f .deps/drive_cache.Tpo .deps/drive_cache.Po
make[4]: Leaving directory /home/verhoeve/em-dosbox/src/dos' make[3]: *** [all-recursive] Error 1 make[3]: Leaving directory /home/verhoeve/em-dosbox/src'
make[2]: *** [all] Error 2
make[2]: Leaving directory /home/verhoeve/em-dosbox/src' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory /home/verhoeve/em-dosbox'
make: *** [all] Error 2
verhoeve@XM44T:~/em-dosbox$

please help on error

[eenallemaal]

sudo apt-get install build-essential cmake python2.7 nodejs default-jre git-core
sudo apt-get install libsdl1.2-dev libsdl1.2debian libsdl-image1.2-dev
aclocal
./autogen.sh
emconfigure ./configure
make -j4

still the same
mkdir emscr
sudo apt-get install git
sudo apt-get install nodejs
sudo apt-get install default-jre
sudo apt-get install llvm

wget http://llvm.org/releases/3.2/clang+llvm-3.2-x86-linux-ubuntu-12.04.tar.gz
gunzip clang+llvm-3.2-x86-linux-ubuntu-12.04.tar.gz
tar xvf clang+llvm-3.2-x86-linux-ubuntu-12.04.tar
git clone git://github.com/kripken/emscripten.git
echo 'edit path like this /home/sol/Desktop/emscripten/clang+llvm-3.2-x86-linux-ubuntu-12.04/bin'

hope-ing for luck

[masterofseige]

I have been trying to follow the compiling instructions, but as a extreme beginner (will be second thing compiled) i am at a loss.

using ubuntu 18-4.
I got to emconfigure ./configure then it errors out. Cannont find SDL 1.2 or better

SDL 2 is installed