1 #!/usr/bin/env python 2 3 import subprocess 4 import difflib 5 6 def capture_2(args0, args1): 7 import subprocess 8 p0 = subprocess.Popen(args0, stdin=None, stdout=subprocess.PIPE, 9 stderr=subprocess.PIPE) 10 p1 = subprocess.Popen(args1, stdin=p0.stdout, stdout=subprocess.PIPE, 11 stderr=subprocess.PIPE) 12 out,_ = p1.communicate() 13 return out 14 15 def normalize_nm(data): 16 lines = data.split('\n') 17 lines.sort() 18 19 # FIXME: Ignore common symbols for now. 20 lines = [ln for ln in lines 21 if not ln.startswith(' C')] 22 23 return lines 24 25 def main(): 26 import sys 27 clang = sys.argv[1] 28 flags = sys.argv[2:] 29 30 # FIXME: Relax to include undefined symbols. 31 nm_args = ["llvm-nm", "-extern-only", "-defined-only"] 32 33 llvmgcc_args = ["llvm-gcc"] + flags + ["-emit-llvm","-c","-o","-"] 34 clang_args = [clang] + flags + ["-emit-llvm","-c","-o","-"] 35 36 llvmgcc_nm = capture_2(llvmgcc_args, nm_args) 37 clang_nm = capture_2(clang_args, nm_args) 38 39 llvmgcc_nm = normalize_nm(llvmgcc_nm) 40 clang_nm = normalize_nm(clang_nm) 41 42 if llvmgcc_nm == clang_nm: 43 sys.exit(0) 44 45 print ' '.join(llvmgcc_args), '|', ' '.join(nm_args) 46 print ' '.join(clang_args), '|', ' '.join(nm_args) 47 for line in difflib.unified_diff(llvmgcc_nm, clang_nm, 48 fromfile="llvm-gcc symbols", 49 tofile="clang symbols"): 50 print line 51 sys.exit(1) 52 53 if __name__ == '__main__': 54 main() 55
