mycc

My awesome the c programming language compiler implementation with C++ 17

Dependency

Currently, most project dependencies are managed by VCPKG, a cross-platform package manager for C++. VCPKG will be downloaded and configured automatically after CMake scripts are configured. The documentation is required of the LATEX compiler.

Install VCPKG Dependencies(Build in pyrite Machine could skip this step)

On Debian and Ubuntu derivatives:

sudo apt-get install curl zip unzip tar pkg-config cmake

On recent Red Hat and Fedora derivatives:

sudo dnf install curl zip unzip tar pkg-config cmake

On older Red Hat and Fedora derivatives:

sudo yum install curl zip unzip tar pkg-config cmake

On SUSE Linux and derivatives:

sudo zypper install curl zip unzip tar pkg-config cmake

On Alpine:

apk add build-base cmake ninja zip unzip curl git pkg-config cmake

Install VCPKG

No Need, will be installed automatically

Install LATEX (Build in pyrite Machine could skip this step)

On Debian and Ubuntu derivatives:

sudo apt-get install -y texlive-base texlive-latex-recommended texlive-latex-extra

Install FLEX (only need when using JVM Bytecode Testing)

On Debian and Ubuntu derivatives:

sudo apt-get install flex

External Dependency Managed by VCPKG (Will automatically compile and linking by CMake)

• Glog: for logging(FileCheck Tools only)
• cli11: for command line parsing(mycc only)
• Gtest: for unit testing (this will be only used in test target) .
• Gflags: for parsing command line flags.

Build

The project is build by cmake and required to use out-of-source build. Both Ninja and Makefile are supported and tested.

Available build targets

• mycc: the compiler target
• mycc_test: testing target for mycc target.
• mycc_e2e_test: end to end testing target for mycc target.
• documentation: documentation target which will compile the documentation from latex to PDF

Available build options

• -DENABLE_ASAN: enable address sanitizer, default is disabled
• -DENABLE_TSAN: enable thread sanitizer, default is disabled
• -DENABLE_MSAN: enable memory sanitizer, default is disabled
• -DENABLE_UBSAN: enable undefined behavior sanitizer, default is disabled
• -DENABLE_TESTING: enable unit testing, default is disabled
• -DENABLE_COVERAGE: enable code coverage, default is disabled
• -DENABLE_DOCUMENTATION: enable documentation, default is enabled
• -DENABLE_E2E_TESTING: enable end to end testing, default is disabled

Special Notes for building in Pyrite

Pyrite's user home folder's IO is really slow. I suggest you can create a folder under /tmp which have 700 permission and use it as the build root. This will significantly improve the build speed (almost 10x).

Release build

In release build, we will use -O3 optimization level. In order to compile, you need to run following command at the root folder of git repository:

cmake . -B./build/ && cd ./build && make mycc documentation -j$(nproc)

The build will be done in ./build directory. The document will be generated to ./build/Documentation/developers.pdf. And the executable will be generated to ./build/Source/mycc.

Debug Build

In debug mode, the compiler will be built with debug symbols and assertions enabled with '-g -O0' and ASAN enabled. In order to compile, you need to run following command at the root folder of git repository:

 cmake . -B./build/ -DCMAKE_BUILD_TYPE=Debug && cd ./build && make mycc documentation -j$(nproc)

The build will be done in ./build directory. The document will be generated to ./build/Documentation/developers.pdf. And the executable will be generated to ./build/bin/ directory.

Testing

There will be two part of testing which split into two different targets:

• mycc_test: unit testing
• mycc_e2e_test: end to end testing

Both of executable target mycc_test and mycc_e2e_test will be located in ./build/bin/ directory.

Unit Testing

Unit testing is done by gtest with following command in git root directory:

 cmake . -B./build/ -DCMAKE_BUILD_TYPE=Debug && cd ./build && make mycc_test -j$(nproc) && ./hzcc/mycc_test

StatusCode Coverage

StatusCode coverage is supported both llvm-cov and gcov, currently code coverage is only supported for mycc_test target. For building with llvm, you need to install llvm-cov, for building with gcc, you need to install gcovr

For summary report to stdout, Run:

 cmake . -B./build/ -DCMAKE_BUILD_TYPE=Debug -DENABLE_TESTING -DENABLE_COVERAGE && cd ./build && make ccov-report-mycc_test -j$(nproc)

For exporting report to cobertura xml format, Run:

 cmake . -B./build/ -DCMAKE_BUILD_TYPE=Debug -DENABLE_TESTING -DENABLE_COVERAGE && cd ./build && make ccov-export-mycc_test -j$(nproc)

End to End Testing

End-to-end testing is done by llvm-lit, LLVM testing tool and FileCheck tools. The test compares the output of the compiler with the expected output rules. The rules files support string matching and regex matching.

You could install llvm-lit via python pip:

pip install lit

Then you could run the test by following command in git root directory:

 cmake . -B./build/ -DCMAKE_BUILD_TYPE=Debug && cd ./build && make mycc_e2e_test -j$(nproc)

Usage

VLOG CompileErrorLevel

• 0: only internal_status warning and error will be printed
• 1: used for print current Status
• 2: print debug information
• 3: print all information including pass output/input

supported arguments

• -c: specify input file RetClass.
• -h,--help: print usage information and exit.
• -v,--version: print version information and exit.
• --fno_color: disable color output.
• --fnice_error: print error message in nice format.
• -o,--output: specify output file RetClass.
• -I,--include: specify include path.(not support yet)