[BUILD] Fixed error when compiling in systems with multiple versions of python installed (#1019)

python/setup.py

@@ -141,10 +141,10 @@ class CMakeBuild(build_ext):
             "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=" + extdir,
             "-DTRITON_BUILD_TUTORIALS=OFF",
             "-DTRITON_BUILD_PYTHON_MODULE=ON",
-            # '-DPYTHON_EXECUTABLE=' + sys.executable,
-            '-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON',
+            "-DPython3_EXECUTABLE:FILEPATH=" + sys.executable,
+            "-DCMAKE_VERBOSE_MAKEFILE:BOOL=ON",
             "-DPYTHON_INCLUDE_DIRS=" + python_include_dir,
-            "-DLLVM_EXTERNAL_LIT=" + lit_dir
+            "-DLLVM_EXTERNAL_LIT=" + lit_dir,
         ] + thirdparty_cmake_args
 
         # configuration