Correctly put dash in front of gencode instead of arch for CUDA

Author: Micket

easybuild/toolchains/compiler/cuda.py

@@ -98,6 +98,6 @@ def _set_compiler_flags(self):
 
         # add gencode compiler flags to list of flags for compiler variables
         for gencode_val in self.options.get('cuda_gencode', []):
-            gencode_option = 'gencode %s' % gencode_val
+            gencode_option = '-gencode %s' % gencode_val
             self.variables.nappend('CUDA_CFLAGS', gencode_option)
             self.variables.nappend('CUDA_CXXFLAGS', gencode_option)

test/framework/toolchain.py

@@ -1356,7 +1356,7 @@ def test_fft_env_vars_intel(self):
     def test_fosscuda(self):
         """Test whether fosscuda is handled properly."""
         tc = self.get_toolchain("fosscuda", version="2018a")
-        opts = {'cuda_gencode': ['-arch=compute_35,code=sm_35', '-arch=compute_10,code=compute_10'], 'openmp': True}
+        opts = {'cuda_gencode': ['arch=compute_35,code=sm_35', 'arch=compute_10,code=compute_10'], 'openmp': True}
         tc.set_options(opts)
         with self.mocked_stdout_stderr():
             tc.prepare()