ubuntu em-dosbox # make
make  all-recursive
make[1]: Вход в каталог `/home/user/em-dosbox'
Making all in src
make[2]: Вход в каталог `/home/user/em-dosbox/src'
Making all in cpu
make[3]: Вход в каталог `/home/user/em-dosbox/src/cpu'
/usr/share/emscripten/em++ -DHAVE_CONFIG_H -I. -I../..  -I../../include -DGET_X86_FUNCTIONS   -O3  -MT libextfun_a-core_normal.o -MD -MP -MF .deps/libextfun_a-core_normal.Tpo -c -o libextfun_a-core_normal.o `test -f 'core_normal.cpp' || echo './'`core_normal.cpp
In file included from core_normal.cpp:24:
./lazyflags.h:19:2: warning: '__LAZYFLAGS_H' is used as a header guard here,
      followed by #define of a different macro [-Wheader-guard]
#if !defined __LAZYFLAGS_H
 ^~
./lazyflags.h:20:9: note: '__LAZYFLAG_H' is defined here; did you mean
      '__LAZYFLAGS_H'?
#define __LAZYFLAG_H
        ^~~~~~~~~~~~
        __LAZYFLAGS_H
1 warning generated.
opt: Unknown command line argument '-disable-loop-vectorization'.  Try: '/home/user/emsdk/clang/fastcomp/build_master_64/bin/opt -help'
opt: Did you mean '-disable-vectorize'?
opt: Unknown command line argument '-disable-slp-vectorization'.  Try: '/home/user/emsdk/clang/fastcomp/build_master_64/bin/opt -help'
opt: Did you mean '-disable-vectorize'?
Traceback (most recent call last):
  File "/usr/share/emscripten/emcc", line 1360, in <module>
    shared.Building.llvm_opt(temp_file, llvm_opts)
  File "/usr/share/emscripten/tools/shared.py", line 1173, in llvm_opt
    assert os.path.exists(target), 'Failed to run llvm optimizations: ' + output
AssertionError: Failed to run llvm optimizations:
make[3]: *** [libextfun_a-core_normal.o] Ошибка 1
make[3]: Выход из каталога `/home/user/em-dosbox/src/cpu'
make[2]: *** [all-recursive] Ошибка 1
make[2]: Выход из каталога `/home/user/em-dosbox/src'
make[1]: *** [all-recursive] Ошибка 1
make[1]: Выход из каталога `/home/user/em-dosbox'
make: *** [all] Ошибка 2