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#!/usr/bin/env python
import subprocess
import difflib
def capture_2(args0, args1):
import subprocess
p0 = subprocess.Popen(args0, stdin=None, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
p1 = subprocess.Popen(args1, stdin=p0.stdout, stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out,_ = p1.communicate()
return out
def normalize_nm(data):
lines = data.split('\n')
lines.sort()
# FIXME: Ignore common symbols for now.
lines = [ln for ln in lines
if not ln.startswith(' C')]
return lines
def main():
import sys
clang = sys.argv[1]
flags = sys.argv[2:]
# FIXME: Relax to include undefined symbols.
nm_args = ["llvm-nm", "-extern-only", "-defined-only"]
llvmgcc_args = ["llvm-gcc"] + flags + ["-emit-llvm","-c","-o","-"]
clang_args = [clang] + flags + ["-emit-llvm","-c","-o","-"]
llvmgcc_nm = capture_2(llvmgcc_args, nm_args)
clang_nm = capture_2(clang_args, nm_args)
llvmgcc_nm = normalize_nm(llvmgcc_nm)
clang_nm = normalize_nm(clang_nm)
if llvmgcc_nm == clang_nm:
sys.exit(0)
print ' '.join(llvmgcc_args), '|', ' '.join(nm_args)
print ' '.join(clang_args), '|', ' '.join(nm_args)
for line in difflib.unified_diff(llvmgcc_nm, clang_nm,
fromfile="llvm-gcc symbols",
tofile="clang symbols"):
print line
sys.exit(1)
if __name__ == '__main__':
main()
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