remysys / ccint

ccint - a C/C++ interpreter, built on top of Clang and LLVM compiler infrastructure

ccint: a C/C++ interpreter

ccint is a C/C++ interpreter, built on top of Clang and LLVM compiler infrastructure.

features

• supports all C++11/C++14/C++17 features
• supports for linking static/dynamic libraries
• high performance: same performance as C/C++ binaries
• separate parser and execution engine

build

$ git clone [email protected]:llvm/llvm-project.git
$ cd llvm-project/clang/tools/
$ git clone [email protected]:remysys/ccint.git
$ echo "add_clang_subdirectory(ccint)" >> CMakeLists.txt
$ cd ../..
$ cmake -S llvm -B build -G "Unix Makefiles"  -DLLVM_ENABLE_PROJECTS="clang" -DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi"  -DCMAKE_BUILD_TYPE=Release
$ cd build && make -j16

usage

./clang-ccint --help
USAGE: clang-ccint [options] <input file>

OPTIONS:
General options:
  -I <string>                                        - specify include paths
  -L <string>                                        - load given libs

examples

• print "hello world"

/* main.cpp */
#include <stdio.h>
#include <vector>
#include <string>

void ccint_main() {
  std::vector<std::string> vec = {"hello", " world\n"};
  for (auto &s : vec) {
    printf("%s", s.c_str());
  }
}

$ ./ccint main.cpp
hello world

• link static library

/* add.h */
int add(int, int);

/* add.c */
int add(int a, int b) {
  return a + b;
}

/* main.cpp */
#include <stdio.h>
#include "add.h"

void ccint_main() {
  printf("32 + 64 = %d\n", add(32, 64));
}

$ clang -c add.c -o add.o
$ ar rcs libadd.a add.o
$ ./ccint main.cpp -L ./libadd.a
32 + 64 = 96

• link dynamic library

/* add.h */
int add(int, int);

/* add.c */

int add(int a, int b) {
  return a + b;
}

/* main.cpp */

#include <stdio.h>
#include "add.h"

void ccint_main() {
  printf("32 + 64 = %d\n", add(32, 64));
}

$ clang -shared -fPIC add.c -o libadd.so
$ ./ccint main.cpp -L ./libadd.so
32 + 64 = 96

• specify include paths

/* add.h */
int add(int, int);

/* add.c */

int add(int a, int b) {
  return a + b;
}

/* main.cpp */

#include <stdio.h>
#include "add.h"

void ccint_main() {
  printf("32 + 64 = %d\n", add(32, 64));
}

$ clang -shared -fPIC add.c -o libadd.so
$ mv ./add.h ..
$ ./ccint main.cpp -L ./libadd.so -I ..
32 + 64 = 96