[SOLVED] boost libraries in Qt: the proper way to install them and why do I have problems?

igorland

Hello. For the first time, I am trying to install boost library into Qt on Mac (10.9.4) and I am completely confused. This is what I did:

I installed boost using homebrew.

I see that hpp files are installed here:

[code]
/usr/local/Cellar/boost/1.55.0_2/include/boost
[/code]

and libraries here:

[code]
/usr/local/Cellar/boost/1.55.0_2/lib
[/code]

Now I start a new Qt console project.

the project file:

[code]
QT += core

QT -= gui

TARGET = testQt
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

INCLUDEPATH += /usr/local/Cellar/boost/1.55.0_2
[/code]

And the main file:

[code]
#include <QCoreApplication>
#include <QtCore>
#include <iostream>
#include <QDebug>

#include <boost/regex.hpp>

using namespace std;

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

std::string line;
boost::regex pat( "^Subject: (Re: |Aw: )(.)" );

while (std::cin)
{
std::getline(std::cin, line);
boost::smatch matches;
if (boost::regex_match(line, matches, pat))
std::cout << matches[2] << std::endl;
}
return a.exec();
}
[/code]

It is not compiling. Issues:

[code]
Symbol(s) not found for architectures x86_64
linker command failed with exist code 1
[/code]

Since I am absolutely noob with boost, did I do it right? If yes, why is it not compiling?
I've read that this may be because boost libraries are built as 32-bit and not 64-bit, but I thought that homebrew would take care of that.

Thanks a lot!

SGaist

Hi,

You are not linking to the boost libraries.

@LIBS +=
-L/usr/local/Cellar/boost/1.55.0_2/lib
-lname_of_boost_library_you_are_using@

igorland

SGaist. Thank you.

[code]
QT += core

QT -= gui

TARGET = testQt
CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += main.cpp

INCLUDEPATH += /usr/local/Cellar/boost/1.55.0_2

LIBS +=
-L/usr/local/Cellar/boost/1.55.0_2/lib
-llibboost_regex.a
[/code]

Error:

@library not found for -llibboost_regex.a@

Same happens with dylib. Is it possible that Qt has no access to use/local?

If I just leave it as

@LIBS +=
-L/usr/local/Cellar/boost/1.55.0_2/lib@

Same issue with architectures x86_64...

Thank you!

SGaist

The extension should not be used in this case and also no prefix

@LIBS += -lboost_regex@

igorland

Nope. Still not working...

https://www.dropbox.com/s/j9f2zjiepmref4y/screen2.png

https://www.dropbox.com/s/z3leuvpklutr1jd/screen5.png

https://www.dropbox.com/s/ipubgzneyw3kyma/screen3.png

Is it possible that my boost library is not compiled correctly for clang? I see it says libc++.

https://www.dropbox.com/s/kvq0vz1qq919agi/screen1.png

But if so, what would be the proper way to compile? I have tried several examples, including the one above and then it would apparently fail.

Thank you!

SGaist

clang and gcc are binary compatible on OS X

You still have the -l part wrong, read again my last post

igorland

SGaist. Thanks for bearing with me:

I hope you meant this:

https://www.dropbox.com/s/gttsooefs1ah7tq/screen6.png

Because putting just @LIBS += -lboost_regex@ without a path gives library not found error.

Thank you!

SGaist

You still need to give the path to find your libraries files

@
LIBS +=
-L/usr/local/Cellar/boost/1.55.0_2/lib
-lboost_regex
@

igorland

SGaist. Thank you so much. Inserting the path as you suggested and inserting this:
@CONFIG += c++11@
into the project file worked. I really appreciate your support! Thank you!