+
+# Sanitizers.
+if config.llvm_use_sanitizer == "Address":
+ config.available_features.add("asan")
+if (config.llvm_use_sanitizer == "Memory" or
+ config.llvm_use_sanitizer == "MemoryWithOrigins"):
+ config.available_features.add("msan")
+
+# Direct object generation
+if not 'hexagon' in config.target_triple:
+ config.available_features.add("object-emission")
+
+if config.have_zlib == "1":
+ config.available_features.add("zlib")
+else:
+ config.available_features.add("nozlib")
+
+# Native compilation: host arch == target arch
+# FIXME: Consider cases that target can be executed
+# even if host_triple were different from target_triple.
+if config.host_triple == config.target_triple:
+ config.available_features.add("native")
+
+import subprocess
+
+def have_ld_plugin_support():
+ if not os.path.exists(os.path.join(config.llvm_shlib_dir, 'LLVMgold.so')):
+ return False
+
+ ld_cmd = subprocess.Popen(['ld', '--help'], stdout = subprocess.PIPE)
+ if not '-plugin' in ld_cmd.stdout.read():
+ return False
+ ld_cmd.wait()
+
+ ld_version = subprocess.Popen(['ld', '--version'], stdout = subprocess.PIPE)
+ if not 'GNU gold' in ld_version.stdout.read():
+ return False
+ ld_version.wait()
+
+ return True
+
+if have_ld_plugin_support():
+ config.available_features.add('ld_plugin')
+
+# Ask llvm-config about assertion mode.
+try:
+ llvm_config_cmd = subprocess.Popen(
+ [os.path.join(llvm_tools_dir, 'llvm-config'), '--assertion-mode'],
+ stdout = subprocess.PIPE)
+except OSError:
+ print("Could not find llvm-config in " + llvm_tools_dir)
+ exit(42)
+
+if re.search(r'ON', llvm_config_cmd.stdout.read().decode('ascii')):
+ config.available_features.add('asserts')
+llvm_config_cmd.wait()
+
+if 'darwin' == sys.platform:
+ try:
+ sysctl_cmd = subprocess.Popen(['sysctl', 'hw.optional.fma'],
+ stdout = subprocess.PIPE)
+ except OSError:
+ print("Could not exec sysctl")
+ result = sysctl_cmd.stdout.read().decode('ascii')
+ if -1 != result.find("hw.optional.fma: 1"):
+ config.available_features.add('fma3')
+ sysctl_cmd.wait()
+
+# .debug_frame is not emitted for targeting Windows x64.
+if not re.match(r'^x86_64.*-(mingw32|win32)', config.target_triple):
+ config.available_features.add('debug_frame')
+
+# Check if we should use gmalloc.
+use_gmalloc_str = lit_config.params.get('use_gmalloc', None)
+if use_gmalloc_str is not None:
+ if use_gmalloc_str.lower() in ('1', 'true'):
+ use_gmalloc = True
+ elif use_gmalloc_str.lower() in ('', '0', 'false'):
+ use_gmalloc = False
+ else:
+ lit_config.fatal('user parameter use_gmalloc should be 0 or 1')
+else:
+ # Default to not using gmalloc
+ use_gmalloc = False
+
+# Allow use of an explicit path for gmalloc library.
+# Will default to '/usr/lib/libgmalloc.dylib' if not set.
+gmalloc_path_str = lit_config.params.get('gmalloc_path',
+ '/usr/lib/libgmalloc.dylib')
+
+if use_gmalloc:
+ config.environment.update({'DYLD_INSERT_LIBRARIES' : gmalloc_path_str})