CODEWITHSUNDEEP
c++linuxqt
sflee
sflee

Reputation: 1719

How to build Qt project in linux with cmake

I am using ubuntu 14.04, cmake 2.8.12.2, Qt5.6.2 (a built version), GNU make 3.81

After I run cmake with cmake PathToSource -G "Eclipse CDT4 - Unix Makefiles"
I do make. I get #error "You must build your code with position independent code if Qt was built with -reduce-relocations. " "Compile your code with -fPIC (-fPIE is not enough)." # error "You must build your code with position independent code if Qt was built with -reduce-relocations. "\

I then download source file of Qt5.7.0, build and install it without problem. I do again cmake PathToSource -G "Eclipse CDT4 - Unix Makefiles", make it. I get many errors, such as /home/sflee/Documents/Software_dev/3rd_party/Qt5.7.0/include/QtCore/qhash.h:957:10: error: ‘pair’ does not name a type auto pair = qAsConst(*this).equal_range(akey); and /home/sflee/Documents/Software_dev/3rd_party/Qt5.7.0/include/QtCore/qbasicatomic.h:285:14: error: ‘Ops’ has not been declared { return Ops::fetchAndAddRelease(_q_value, valueToAdd); }

How to solve it?

Upvotes: 1

Views: 1111

Answers (1)

hyde
hyde

Reputation: 62777

Qt 5.7 requires C++11 compiler. If you get that kind of error from auto pair, it sounds like your compiler is not compiling C++11 code. There are two possible reasons:

  1. You just need to pass -std=c++11 to your compiler, as explaned under this question.

  2. You have too old compiler. However, since you compiled Qt 5.7 itself with the same compiler, this shouldn't be the problem for you.

Upvotes: 2

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