allow pyston to run from a directory other than pyston

-the Makefile has been moved up from src/Makefile to the top level
-all pyston binaries and unittests (gc, analysis) are also placed in the
top directory

.gitignore

@@ -20,6 +20,8 @@ pyston_release
 pyston_grwl
 pyston_grwl_dbg
 pyston_nosync
+/gc
+/analysis
 
 *.cache
 tests/t.py

src/codegen/parser.cpp

@@ -889,9 +889,6 @@ static std::string getParserCommandLine(const char* fn) {
     // Start by removing the binary name, because the "pyston" binary will break the logic below
     llvm::sys::path::remove_filename(parse_ast_fn);
 
-    while (llvm::sys::path::filename(parse_ast_fn) != "pyston") {
-        llvm::sys::path::remove_filename(parse_ast_fn);
-    }
     llvm::sys::path::append(parse_ast_fn, "src/codegen/parse_ast.py");
 
     return std::string("python -S ") + parse_ast_fn.str().str() + " " + fn;

src/jit.cpp

@@ -119,7 +119,6 @@ int main(int argc, char** argv) {
 
     llvm::SmallString<128> stdlib_dir(self_path);
     llvm::sys::path::remove_filename(stdlib_dir); // executable name
-    llvm::sys::path::remove_filename(stdlib_dir); // "src/" dir
     llvm::sys::path::append(stdlib_dir, "lib_python");
     llvm::sys::path::append(stdlib_dir, "2.7");
     appendToSysPath(stdlib_dir.c_str());

src/runtime/capi.cpp

@@ -937,7 +937,7 @@ extern "C" Py_ssize_t PyNumber_AsSsize_t(PyObject* o, PyObject* exc) {
 }
 
 BoxedModule* importTestExtension(const std::string& name) {
-    std::string pathname_name = "../test/test_extension/" + name + ".pyston.so";
+    std::string pathname_name = "test/test_extension/" + name + ".pyston.so";
     const char* pathname = pathname_name.c_str();
     void* handle = dlopen(pathname, RTLD_NOW);
     if (!handle) {

test/unittests/analysis.cpp

@@ -22,7 +22,7 @@ protected:
 };
 
 TEST_F(AnalysisTest, augassign) {
-    const std::string fn("../test/unittests/analysis_listcomp.py");
+    const std::string fn("test/unittests/analysis_listcomp.py");
     AST_Module* module = caching_parse(fn.c_str());
     assert(module);
 

tools/tester.py

@@ -69,7 +69,7 @@ def get_expected_output(fn):
 
     # TODO don't suppress warnings globally:
     env = dict(os.environ)
-    env["PYTHONPATH"] = "../test/test_extension/build/lib.linux-x86_64-2.7/"
+    env["PYTHONPATH"] = os.path.dirname(os.path.realpath(__file__)) + "/../test/test_extension/build/lib.linux-x86_64-2.7/"
     p = subprocess.Popen(["python", "-Wignore", fn], stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=open("/dev/null"), preexec_fn=set_ulimits, env=env)
     out, err = p.communicate()
     code = p.wait()