pragma solidity ^0.4.2;
import "global_functions.sol";
contract strtest
{
    bool ib_equal;
    function test(string p1,string p2) returns(bool) {
        ib_equal = strcompare(p1,p2) ;
        return true;
    }
}

function strcompare(string p_source,string p_target) external returns(bool) {
    bytes memory lbt_left;
    bytes memory lbt_right;
    lbt_left = bytes(p_source);
    lbt_right = bytes(p_target);
    bool lb_equal = true;
    uint li_length = lbt_right.length;
    for( uint p = 0 ;p < li_length;p++){
        if (lbt_left[p] == lbt_right[p] ) {
            continue;
        } else {
            lb_equal = false;
            break;
        }
    }
    return lb_equal;
}

> var test1 = "pragma solidity ^0.4.2;import '/barkely/lend/global_functions.sol';contract strtest { bool ib_equal; function test(string p1,string p2) returns(bool) { return true;  }}"
undefined
> var test1Compiled = web3.eth.compile.solidity(test1)

Error: solc: exit status 1
/tmp/geth-compile-solidity119170518:1:24: Error: Source "/barkely/lend/global_functions.sol" not found: File not found.
pragma solidity ^0.4.2;import '/barkely/lend/global_functions.sol';contract strtest { bool ib_equal; function test(string p1,string p2) returns(bool) { return true;  }}
                       ^------------------------------------------^

    at web3.js:3119:20
    at web3.js:6023:15
    at web3.js:4995:36
    at <anonymous>:1:21

>

import '/barkely/lend/global_functions.sol'  //absoulte path

import './global_functions.sol'  //the same path with strtest.sol