[cfe-users] Help! Can not disable -Wsign-conversion!

[robbinfam]

yes，the flags passed to the clang

发自我的 iPhone

在 2013-9-8，0:04，David Blaikie <dblaikie at gmail.com> 写道：

> 
> 
> 
> On Sat, Sep 7, 2013 at 8:57 AM, Fan Yu <tianjiao08 at gmail.com> wrote:
>> Hi, I got a problem when using clang++ 3.2 at my C++ project.
>> 
>> I use CXXFLAGS like :
>> 
>> -- CXX_FLAGS = -g -D_FILE_OFFSET_BITS=64 -Wall -Wextra -Werror -Wno-error=sign-conversion -Wconversion -Wno-sign-conversion -Wno-unused-parameter -Wold-style-cast -Woverloaded-virtual -Wpointer-arith -Wshadow -Wwrite-strings -march=native -Wno-null-conversion -Wno-tautological-compare -Wno-unused-function -std=c++0x -O0
> 
> Are you sure those flags are actually getting passed to your compile command?
>  
>> 
>> I use -Wno-sign-conversion to disable the warning, but I still got the error, How can I disable it, anyone can help me? thank you
>> /home/ubuntu/claire/claire-common/claire/common/eventloop/poller/EPollPoller.cc:112:13: error: implicit conversion changes signedness: 'int' to 'unsigned int'
>>       [-Werror,-Wsign-conversion]
>>         if (channel->events() & ~(got))
>>             ^~~~~~~~~~~~~~~~~ ~
>> /home/ubuntu/claire/claire-common/claire/common/eventloop/poller/EPollPoller.cc:132:41: error: implicit conversion changes signedness: 'uint32_t' (aka 'unsigned int') to 'int'
>>       [-Werror,-Wsign-conversion]
>>         channel->set_revents(events_[i].events);
>>         ~~~~~~~              ~~~~~~~~~~~^~~~~~
>> /home/ubuntu/claire/claire-common/claire/common/eventloop/poller/EPollPoller.cc:138:27: error: implicit conversion changes signedness: 'int' to 'size_type' (aka 'unsigned long')
>>       [-Werror,-Wsign-conversion]
>>         events_.resize(cnt*2);
>>         ~~~~~~~        ~~~^~
>> /home/ubuntu/claire/claire-common/claire/common/eventloop/poller/EPollPoller.cc:143:73: error: implicit conversion changes signedness: 'const int' to 'size_type'
>>       (aka 'unsigned long') [-Werror,-Wsign-conversion]
>>         if (static_cast<size_t>((*it)) < channels_.size() && !channels_[*it].channel->IsNoneEvent())
>>                                                               ~~~~~~~~~ ^~~
>> /home/ubuntu/claire/claire-common/claire/common/eventloop/poller/EPollPoller.cc:145:42: error: implicit conversion changes signedness: 'const int' to 'size_type'
>>       (aka 'unsigned long') [-Werror,-Wsign-conversion]
>>             actives->push_back(channels_[*it].channel);
>>                                ~~~~~~~~~ ^~~
>> 
>> 
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> 
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