Hi,

I'm following README for installation and was getting stuck while `make` in the EC2 machine. I was able to successfully install it in my local machine though - 

```
make  all-recursive
make[1]: Entering directory '/home/ubuntu/libredwg'
Making all in src
make[2]: Entering directory '/home/ubuntu/libredwg/src'
(CDPATH="${ZSH_VERSION+.}:" && cd .. && /bin/bash /home/ubuntu/libredwg/build-aux/missing autoheader)
rm -f stamp-h1
touch config.h.in
cd .. && /bin/bash ./config.status src/config.h
config.status: creating src/config.h
config.status: src/config.h is unchanged
make  all-am
make[3]: Entering directory '/home/ubuntu/libredwg/src'
  CC       dwg.lo
  CC       common.lo
  CC       bits.lo
  CC       decode.lo
gcc: internal compiler error: Killed (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
Makefile:648: recipe for target 'decode.lo' failed
make[3]: *** [decode.lo] Error 1
make[3]: Leaving directory '/home/ubuntu/libredwg/src'
Makefile:518: recipe for target 'all' failed
make[2]: *** [all] Error 2
make[2]: Leaving directory '/home/ubuntu/libredwg/src'
Makefile:672: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/ubuntu/libredwg'
Makefile:555: recipe for target 'all' failed
make: *** [all] Error 2
```

Also, what is the correct way of installation for the production environment?
gcc-7: internal compiler error:
This is a GitHub Issue
repo:libredwg
owner:LibreDWG
Title : gcc-7: internal compiler error:
Issue date:

--- start body ---
Hi,

I'm following README for installation and was getting stuck while `make` in the EC2 machine. I was able to successfully install it in my local machine though - 

```
make  all-recursive
make[1]: Entering directory '/home/ubuntu/libredwg'
Making all in src
make[2]: Entering directory '/home/ubuntu/libredwg/src'
(CDPATH="${ZSH_VERSION+.}:" && cd .. && /bin/bash /home/ubuntu/libredwg/build-aux/missing autoheader)
rm -f stamp-h1
touch config.h.in
cd .. && /bin/bash ./config.status src/config.h
config.status: creating src/config.h
config.status: src/config.h is unchanged
make  all-am
make[3]: Entering directory '/home/ubuntu/libredwg/src'
  CC       dwg.lo
  CC       common.lo
  CC       bits.lo
  CC       decode.lo
gcc: internal compiler error: Killed (program cc1)
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gcc-7/README.Bugs> for instructions.
Makefile:648: recipe for target 'decode.lo' failed
make[3]: *** [decode.lo] Error 1
make[3]: Leaving directory '/home/ubuntu/libredwg/src'
Makefile:518: recipe for target 'all' failed
make[2]: *** [all] Error 2
make[2]: Leaving directory '/home/ubuntu/libredwg/src'
Makefile:672: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/home/ubuntu/libredwg'
Makefile:555: recipe for target 'all' failed
make: *** [all] Error 2
```

Also, what is the correct way of installation for the production environment?
--- end body ---
