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From "Xie Zhongle (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SINGA-272) singa::logging classes are missing from libsinga.so
Date Tue, 22 Nov 2016 13:08:58 GMT

    [ https://issues.apache.org/jira/browse/SINGA-272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15686716#comment-15686716
] 

Xie Zhongle commented on SINGA-272:
-----------------------------------

This is not a bug or an issue.
Since you compiled singa with glog, you should define the macro and link glog lib when you
write your own code.
If you do not want to use glog, please uninstall your glog library before you compile/install
singa libs.
I am adding a new option to disable glog usage manually even if glog lib is detected by cmake
in the new PR.

> singa::logging classes are missing from libsinga.so 
> ----------------------------------------------------
>
>                 Key: SINGA-272
>                 URL: https://issues.apache.org/jira/browse/SINGA-272
>             Project: Singa
>          Issue Type: Bug
>         Environment: Linux (Ubuntu)
>            Reporter: Moaz Reyad
>
> When I try to compile a C++ file like
> {code:title=test.cpp|borderStyle=solid}
> #include "singa/io/encoder.h"
> #include "singa/io/decoder.h"
> #include <iostream>
> #include <sstream>
> #include <algorithm>
> using namespace std;
> using singa::Shape;
> using singa::Tensor;
> int main()
> {
> 	cout << "Testing..." << endl;
>   singa::CSVEncoder encoder;
>   singa::CSVDecoder decoder;
>   singa::DecoderConf decoder_conf;
>   decoder_conf.set_has_label(true);
>   decoder.Setup(decoder_conf);
>  float in_data[] = {1.23f, 4.5f, 5.1f, 3.33f, 0.44f};
>   std::string in_str = "2, 1.23, 4.5, 5.1, 3.33, 0.44";
>   int in_label = 2;
>   size_t size = 5;
>   std::vector<Tensor> input;
>   Tensor data(Shape{size}, singa::kFloat32), label(Shape{1}, singa::kInt);
>   data.CopyDataFromHostPtr<float>(in_data, size);
>   label.CopyDataFromHostPtr<int>(&in_label, 1);
>   input.push_back(data);
>   input.push_back(label);
>   std::string value = encoder.Encode(input);
>   in_str.erase(std::remove(in_str.begin(), in_str.end(), ' '), in_str.end());
>   std::vector<Tensor> output = decoder.Decode(value);
>   const auto* out_data = output.at(0).data<float>();
>   const auto* out_label = output.at(1).data<int>();
> 	return 0;
> }
> {code}
> I get this error:
> {code:title=compiling|borderStyle=solid}
> $ g++ ./test.cpp -l singa
> /tmp/cc46xzSI.o: In function `singa::Block::data() const':
> test.cpp:(.text._ZNK5singa5Block4dataEv[_ZNK5singa5Block4dataEv]+0x4b): undefined reference
to `singa::logging::LogMessageFatal::LogMessageFatal(char const*, int)'
> test.cpp:(.text._ZNK5singa5Block4dataEv[_ZNK5singa5Block4dataEv]+0x7f): undefined reference
to `singa::logging::LogMessageFatal::~LogMessageFatal()'
> test.cpp:(.text._ZNK5singa5Block4dataEv[_ZNK5singa5Block4dataEv]+0xba): undefined reference
to `singa::logging::LogMessageFatal::~LogMessageFatal()'
> collect2: error: ld returned 1 exit status
> {code}
> I think singa::logging classes are not linked correctly in libsinga.so during installation.
> The workaround is to do:
> $g++ -DUSE_GLOG ./test.cpp -l singa -l glog
> But it is better if libsinga.so is built with singa::logging classes.



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