Merge pull request #2589 from peastman/runtime

Prefer runtime compiler over nvcc

platforms/cuda/src/CudaContext.cpp

@@ -132,16 +132,6 @@ CudaContext::CudaContext(const System& system, int deviceIndex, bool useBlocking
     isNvccAvailable = (res == 0 && stat(tempDir.c_str(), &info) == 0);
     int cudaDriverVersion;
     cuDriverGetVersion(&cudaDriverVersion);
-    static bool hasShownNvccWarning = false;
-    if (hasCompilerKernel && !isNvccAvailable && !hasShownNvccWarning && cudaDriverVersion < 8000) {
-        hasShownNvccWarning = true;
-        printf("Could not find nvcc.  Using runtime compiler, which may produce slower performance.  ");
-#ifdef WIN32
-        printf("Set CUDA_BIN_PATH to specify where nvcc is located.\n");
-#else
-        printf("Set OPENMM_CUDA_COMPILER to specify where nvcc is located.\n");
-#endif
-    }
     if (hostCompiler.size() > 0)
         this->compiler = compiler+" --compiler-bindir "+hostCompiler;
     if (!hasInitializedCuda) {
@@ -575,7 +565,7 @@ CUmodule CudaContext::createModule(const string source, const map<string, string
 
     // If the runtime compiler plugin is available, use it.
 
-    if (hasCompilerKernel && !isNvccAvailable) {
+    if (hasCompilerKernel) {
         string ptx = compilerKernel.getAs<CudaCompilerKernel>().createModule(src.str(), "-arch=compute_"+gpuArchitecture+" "+options, *this);
 
         // If possible, write the PTX out to a temporary file so we can cache it for later use.