Hello,

I am sorry, I did not point out that I chose to use C++11 and hence ones
needs Qt5 (which understands "CONFIG += c++11" and will adjust the
compiler options) to build this without modifications. I just uploaded
an updated version that modifies the compiler flags directly. Please
retry and sorry for the inconvenience.

Best regards, Adam.

Am 20.10.2014 um 01:58 schrieb Martin Spacek:
> Adam, I tried building your example, but I get this compile error on
> make. This is in Xubuntu 14.04 amd64:
> 
> mspacek@Escher:~/Desktop/tile-artefact$ qmake
> mspacek@Escher:~/Desktop/tile-artefact$ make
> g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++-64 -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4 -I/usr/include/poppler/qt4 -I/usr/include/poppler -I. -o tile-artefact.o tile-artefact.cpp
> tile-artefact.cpp:39:5: warning: identifier ‘constexpr’ is a keyword in C++11 [-Wc++0x-compat]
>      constexpr auto r = 96.47;
>      ^
> tile-artefact.cpp: In function ‘int main(int, char**)’:
> tile-artefact.cpp:23:47: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11 [enabled by default]
>      const QScopedPointer< Poppler::Document > document{ Poppler::Document::load(arguments.at(1)) };
>                                                ^
> tile-artefact.cpp:23:98: error: in C++98 ‘document’ must be initialized by constructor, not by ‘{...}’
>      const QScopedPointer< Poppler::Document > document{ Poppler::Document::load(arguments.at(1)) };
>                                                                                                   ^
> tile-artefact.cpp:31:43: warning: extended initializer lists only available with -std=c++11 or -std=gnu++11 [enabled by default]
>      const QScopedPointer< Poppler::Page > page{ document->page(0) };
>                                            ^
> tile-artefact.cpp:31:67: error: in C++98 ‘page’ must be initialized by constructor, not by ‘{...}’
>      const QScopedPointer< Poppler::Page > page{ document->page(0) };
>                                                                    ^
> tile-artefact.cpp:39:5: error: ‘constexpr’ was not declared in this scope
>      constexpr auto r = 96.47;
>      ^
> tile-artefact.cpp:39:15: error: expected ‘;’ before ‘auto’
>      constexpr auto r = 96.47;
>                ^
> tile-artefact.cpp:40:15: error: expected ‘;’ before ‘auto’
>      constexpr auto x = 0, y = 531;
>                ^
> tile-artefact.cpp:41:15: error: expected ‘;’ before ‘auto’
>      constexpr auto w = 410, h = 530;
>                ^
> tile-artefact.cpp:44:5: warning: ‘auto’ changes meaning in C++11; please remove it [-Wc++0x-compat]
>      auto image = page->renderToImage(r, r, -1, -1, -1, -1);
>      ^
> tile-artefact.cpp:44:10: error: ‘image’ does not name a type
>      auto image = page->renderToImage(r, r, -1, -1, -1, -1);
>           ^
> tile-artefact.cpp:46:5: warning: ‘auto’ changes meaning in C++11; please remove it [-Wc++0x-compat]
>      auto label = new QLabel();
>      ^
> tile-artefact.cpp:46:10: error: ‘label’ does not name a type
>      auto label = new QLabel();
>           ^
> tile-artefact.cpp:47:5: error: ‘label’ was not declared in this scope
>      label->setWindowTitle("Full page");
>      ^
> tile-artefact.cpp:48:41: error: ‘image’ was not declared in this scope
>      label->setPixmap(QPixmap::fromImage(image));
>                                          ^
> tile-artefact.cpp:54:33: error: ‘r’ was not declared in this scope
>      image = page->renderToImage(r, r, x, y, w, h);
>                                  ^
> tile-artefact.cpp:54:39: error: ‘x’ was not declared in this scope
>      image = page->renderToImage(r, r, x, y, w, h);
>                                        ^
> tile-artefact.cpp:54:42: error: ‘y’ was not declared in this scope
>      image = page->renderToImage(r, r, x, y, w, h);
>                                           ^
> tile-artefact.cpp:54:45: error: ‘w’ was not declared in this scope
>      image = page->renderToImage(r, r, x, y, w, h);
>                                              ^
> tile-artefact.cpp:54:48: error: ‘h’ was not declared in this scope
>      image = page->renderToImage(r, r, x, y, w, h);
>                                                 ^
> make: *** [tile-artefact.o] Error 1
>