OS: CentOS 7.4

Prequest dependency environment:

1. python >= 3.6.8
2. cmake >= 3.19.0
3. boost == 1.67.0
4. clang == 6.0.0
5. gcc == 4.9.4
6. llvm == 6.0.0

How to build:

1. In merlin_setting.sh, change MERLIN_COMPILER_HOME to your absolute path
2. Download gcc4.9.4 to $gcc_path specified in merlin_settings.sh and compile, add built library path to LD_LIBRARY_PATH in merlin_setting.sh
3. Download llvm6.0.0, clang 6.0.0, boost1.67.0 to the path specified in merlin_settings.sh, and compile all the packages with gcc4.9.4 built in step 2
4. source merlin_setting.sh
5. cd trunk/build;
6. cmake3 -DCMAKE_BUILD_TYPE=Release ..;
7. make -j;

How to run: run "merlincc -h", follow the help message