Stop hipcc from passing --hip-device-lib-path (#56)

to clang by default.

Let clang determine device lib path by itself by default.

Only do that if env var DEVICE_LIB_PATH is set.

Change-Id: I403cf3e6a10215f85871f9dad79cd57f67395e59

amd/hipcc/src/hipBin_amd.h

@@ -331,28 +331,7 @@ string HipBinAmd::getCppConfig() {
 
 string HipBinAmd::getDeviceLibPath() const {
  const EnvVariables& var = getEnvVariables();
- const string& rocclrHomePath = getRocclrHomePath();
- const string& roccmPath = getRoccmPath();
- fs::path bitCodePath = rocclrHomePath;
- bitCodePath /= "lib/bitcode";
  string deviceLibPath = var.deviceLibPathEnv_;
- if (deviceLibPath.empty() && fs::exists(bitCodePath)) {
- deviceLibPath = bitCodePath.string();
- }
-
- if (deviceLibPath.empty()) {
- fs::path amdgcnBitcode = roccmPath;
- amdgcnBitcode /= "amdgcn/bitcode";
- if (fs::exists(amdgcnBitcode)) {
- deviceLibPath = amdgcnBitcode.string();
- } else {
- // This path is to support an older build of the device library
- // TODO(hipcc): To be removed in the future.
- fs::path lib = roccmPath;
- lib /= "lib";
- deviceLibPath = lib.string();
- }
- }
  return deviceLibPath;
 }
 
@@ -876,9 +855,7 @@ void HipBinAmd::executeHipCCCmd(vector<string> argv) {
  }
 
  if (hasHIP) {
- fs::path bitcodeFs = roccmPath;
- bitcodeFs /= "amdgcn/bitcode";
- if (deviceLibPath != bitcodeFs.string()) {
+ if (!deviceLibPath.empty()) {
  string hip_device_lib_str = " --hip-device-lib-path=\""
  + deviceLibPath + "\"";
  HIPCXXFLAGS += hip_device_lib_str;