Some compile issues with recent gcc/cmake (and possible workarounds) about aeon-legacy HOT 3 OPEN

[ 56%] Linking CXX static library libcryptonote_core.a

[ 56%] Built target cryptonote_core

Scanning dependencies of target hash-target-tests

Scanning dependencies of target unit_tests

Scanning dependencies of target connectivity_tool

Scanning dependencies of target simpleminer

make[2]: *** No rule to make target 'tests/unit_tests/base58.cpp', needed by 'tests/CMakeFiles/unit_tests.dir/unit_tests/base58.cpp.o'.  Stop.

CMakeFiles/Makefile2:687: recipe for target 'tests/CMakeFiles/unit_tests.dir/all' failed

make[1]: *** [tests/CMakeFiles/unit_tests.dir/all] Error 2

make[1]: *** Waiting for unfinished jobs....

make[2]: *** No rule to make target 'src/connectivity_tool/conn_tool.cpp', needed by 'src/CMakeFiles/connectivity_tool.dir/connectivity_tool/conn_tool.cpp.o'.  Stop.

CMakeFiles/Makefile2:216: recipe for target 'src/CMakeFiles/connectivity_tool.dir/all' failed

make[1]: *** [src/CMakeFiles/connectivity_tool.dir/all] Error 2

[ 57%] Building CXX object tests/CMakeFiles/hash-target-tests.dir/hash-target.cpp.o

[ 58%] Building CXX object src/CMakeFiles/simpleminer.dir/miner/simpleminer.cpp.o

/home/fxrc/crypto-miners/aeon/tests/hash-target.cpp: In function ‘int main(int, char**)’:

/home/fxrc/crypto-miners/aeon/tests/hash-target.cpp:46:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

       if (check_hash(h, diff) != (b == 0 || diff <= 255 / b)) {

                                             ~~~~~^~~~~~~~~~

/home/fxrc/crypto-miners/aeon/tests/hash-target.cpp:52:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]

         if (check_hash(h, diff) != (diff <= 255 / b)) {

                                     ~~~~~^~~~~~~~~~

[ 58%] Linking CXX executable hash-target-tests

[ 58%] Built target hash-target-tests

[ 59%] Linking CXX static library libwallet.a

[ 59%] Built target wallet

[ 59%] Linking CXX static library librpc.a

[ 59%] Built target rpc

[ 60%] Linking CXX executable simpleminer

[ 60%] Built target simpleminer

Makefile:140: recipe for target 'all' failed

make: *** [all] Error 2

g++ 7.2.0
GNU Make 4.1
cmake version 3.9.5

Compile with : 

mkdir dist && cd dist
cmake ..
make