1#!/usr/bin/env python3 2# 3# Script to analyze warnings produced by clang. 4# 5# This file is part of GCC. 6# 7# GCC is free software; you can redistribute it and/or modify it under 8# the terms of the GNU General Public License as published by the Free 9# Software Foundation; either version 3, or (at your option) any later 10# version. 11# 12# GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13# WARRANTY; without even the implied warranty of MERCHANTABILITY or 14# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15# for more details. 16# 17# You should have received a copy of the GNU General Public License 18# along with GCC; see the file COPYING3. If not see 19# <http://www.gnu.org/licenses/>. */ 20# 21# 22# 23 24import argparse 25 26 27def skip_warning(filename, message): 28 ignores = { 29 '': ['-Warray-bounds', '-Wmismatched-tags', 30 'gcc_gfc: -Wignored-attributes', '-Wchar-subscripts', 31 'string literal (potentially insecure): -Wformat-security', 32 '-Wdeprecated-register', 33 '-Wvarargs', 'keyword is hidden by macro definition', 34 "but the argument has type 'char *': -Wformat-pedantic", 35 '-Wnested-anon-types', 36 'qualifier in explicit instantiation of', 37 'attribute argument not supported: asm_fprintf', 38 'when in C++ mode, this behavior is deprecated', 39 '-Wignored-attributes', '-Wgnu-zero-variadic-macro-arguments', 40 '-Wformat-security', '-Wundefined-internal', 41 '-Wunknown-warning-option', '-Wc++20-extensions', 42 '-Wbitwise-instead-of-logical'], 43 'insn-modes.cc': ['-Wshift-count-overflow'], 44 'insn-emit.cc': ['-Wtautological-compare'], 45 'insn-attrtab.cc': ['-Wparentheses-equality'], 46 'gimple-match.cc': ['-Wunused-', '-Wtautological-compare'], 47 'generic-match.cc': ['-Wunused-', '-Wtautological-compare'], 48 'i386.md': ['-Wparentheses-equality', '-Wtautological-compare', 49 '-Wtautological-overlap-compare'], 50 'sse.md': ['-Wparentheses-equality', '-Wtautological-compare', 51 '-Wconstant-logical-operand'], 52 'mmx.md': ['-Wtautological-compare'], 53 'genautomata.cc': ['-Wstring-plus-int'], 54 'fold-const-call.cc': ['-Wreturn-type'], 55 'gfortran.texi': [''], 56 'libtool': [''], 57 'lex.cc': ['-Wc++20-attribute-extensions'], 58 } 59 60 for name, ignores in ignores.items(): 61 for i in ignores: 62 if name in filename and i in message: 63 return True 64 return False 65 66 67parser = argparse.ArgumentParser() 68parser.add_argument('log', help='Log file with clang warnings') 69args = parser.parse_args() 70 71lines = [line.strip() for line in open(args.log)] 72total = 0 73messages = [] 74for line in lines: 75 token = ': warning: ' 76 i = line.find(token) 77 if i != -1: 78 location = line[:i] 79 message = line[i + len(token):] 80 if not skip_warning(location, message): 81 total += 1 82 messages.append(line) 83 84for line in sorted(messages): 85 print(line) 86print('\nTotal warnings: %d' % total) 87