expcov - Code coverage analyzer based on clang

How to use

1. Write source code
   test1.c

   #include <stdio.h>
   
   void message()
   {
   	printf("Hello, world\n");
   }
   

   
   test2.c

   #include <stdio.h>
   
   void message();
   
   int main(int argc, char *argv[])
   {
   	message();
   	return 0;
   }
   

   
   
2. Compile source code with '--expcov' option.

   clang --expcov -c test1.c
   clang --expcov -c test2.c
   

   
   
3. Link object file with '--expcov' option.

   clang --expcov test1.o test2.o -o test
   

   
   
4. Execute program.

   ./test
   

   The program 'test' generates coverage data file 'test.cov' when exit.
   
   
5. Execute program with environment variable 'EXPCOV_REPORT'.

   EXPCOV_REPORT=1 ./test
   

   The program 'test' generates HTML reports and exit program immediately;
   

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