| # Compilation Issues |
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| This page summarizes a list of questions related to the compilation and building of OpenTimer. |
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| #### Q: What compiler does OpenTimer support now? |
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| **A:** OpenTimer currently requires g++ v7.2 and clang++ v6.0 with -std=c++17. |
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| #### Q: How do I switch to different compilers to compile OpenTimer? |
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| **A:** OpenTimer uses CMake to manage the build process. You can switch to either g++ or clang++ |
| by overriding the variable `CMAKE_CXX_COMPILER`. |
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|
| ```bash |
| # use clang++ to build OpenTimer |
| ~$ cmake ../ -DCMAKE_CXX_COMPILER=clang++ |
| ~$ make |
| |
| # use g++ to build OpenTimer |
| ~$ cmake ../ -DCMAKE_CXX_COMPILER=g++ |
| ~$ make |
| ``` |
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| #### Q: How can I clean up the entire project and rebuild the source? |
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| **A:** When cmake gets messed up with different settings, you can remove |
| `build/CMakeCache.txt` or remove the entire `build` to start from scratch. |
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|
| ```bash |
| # remove CMake cached files |
| ~$ make clean |
| ~$ rm CMakeCache.txt |
| ~$ cmake ../ |
| ~$ make |
| |
| # or you can remove the entire build folder and start over |
| ~$ rm -rf build |
| ~$ mkdir build |
| ~$ cd build |
| ~$ cmake ../ |
| ~$ make |
| ``` |
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