使用execlp运行时，g ++会出现错误，但不能从终端运行吗？

Question

Using fork() and execlp(), I'm trying to compile a cpp file to a .so. I'm running a copied g++-4.8 executable that's in my project's directory tree. When run from the terminal, everything goes smoothly and I end up with a working dynamic library, but when I make a child process and use execlp to do the same thing, I get an error:

g++-4.8: error: @@@: No such file or directory

This is repeated 6 times with a few characters in the "filename" changed around a bit. To compare, this is what I write in the terminal:

$ g++/bin/g++-4.8 -fPIC -shared bob.cpp -o bob.so

...and this is the code that generates the error:

if (fork() == 0) {
    execlp("g++/bin/g++-4.8", "g++/bin/g++-4.8", "-fPIC", "-shared", "bob.cpp", "-o", "-bob.so");
}

bob.cpp is in the working directory of the parent process, and the terminal code is executed from that same directory.

Answer 1

@@@ is a typical sequence from the header of a binary (ELF) file. You forgot to NULL terminate your argument list to execlp() , so it read garbage and tried to pass it to g++.