Boost Process fails on Solaris 10 in sync mode

I am using boost process in async mode to run shell commands from a C++ application. The following code works well in Linux (CentOS 7 in my case), but fails on Solaris 10. On Solaris 10, the return code is 127 and stdout and stderr are empty.

#include <iostream>
#include <thread>
#include <boost/process.hpp>
#include <boost/asio.hpp>

namespace bp = boost::process ;
int main(int argc, char** argv)
{
    std::future<std::string> dataOut;
    std::future<std::string> dataErr;

    std::string command = "ls";
    boost::asio::io_service ios;
    bp::child c(command, bp::std_out > dataOut, bp::std_err > dataErr, ios);
    ios.run();
    c.wait();
    int result = c.exit_code();
    std::string stdOut = dataOut.get();
    std::string stdErr = dataErr.get();
    std::cout << "Exit Code " << result  << std::endl;
    std::cout << "stdOut " << stdOut  << std::endl;
    std::cout << "stdErr " << stdErr  << std::endl;
    return 0;
}

Output on CentOS 7

Exit Code 0
stdOut a.out
main.cpp
Process.cpp
Process.h
simple.cpp

stdErr 

Output on Solaris 10

Exit Code 127
stdOut 
stdErr 

Please help me figure what is going on.