Let say we have 3 .cpp in our project as below:
//abc.cpp
#include <iostream>
class abc
{
public:
static int sabc;
};
int abc::sabc = [](){std::cout << "init abc" << std::endl; return 0;}();
//abcd.cpp
#include <iostream>
class abcd
{
public:
static int sabcd;
};
int abcd::sabcd = [](){std::cout << "init abcd" << std::endl; return 0;}();
//test.cpp
int main()
{
return 0;
}
Given above .cpp, I build the test executable and run it by following
typing:
>em++ -std=c++11 abc.cpp abcd.cpp -o abc.bc
>em++ -std=c++11 abc.bc test.cpp -o test.js
>node test.js
init abc
init abcd
As we see in the output, those static class variables will be initialized
ahead due to unused abc.obj and abcd.obj will be linked to final
executable. Is there any way to prevent these unused objs to be linked into
final executable so that those global variables in them will not be
initialized?
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