cmake does not work

[Devanshu Jain]

Thanks a lot Tomaz for the help. I put the line:

*set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")*

It worked.


On Thu, Jul 10, 2014 at 9:05 PM, Tomaz Canabrava <tcanabrava at kde.org> wrote:

> I don't seem to find the -fPIC there... put it. :)
>
> On Thu, Jul 10, 2014 at 12:29 PM, Devanshu Jain
> <devanshu.jain919 at gmail.com> wrote:
> > Hi Tomaz,
> > The CXX_COMPILER_FLAGS part of cmakeLists.txt looks like:
> >
> > ********-----------------********
> >
> > include(CheckCXXCompilerFlag)
> > CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
> > CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
> > if(COMPILER_SUPPORTS_CXX11)
> >     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
> > elseif(COMPILER_SUPPORTS_CXX0X)
> >     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
> > else()
> >         message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11
> > support. Please use a different C++ compiler.")
> > endif()
> >
> > *************---------------------************
> >
> >  How should I add fPIC to this.
> >
> >
> >
> >
> > On Thu, Jul 10, 2014 at 8:51 PM, Tomaz Canabrava <tcanabrava at kde.org>
> wrote:
> >>
> >> On Thu, Jul 10, 2014 at 12:17 PM, Devanshu Jain
> >> <devanshu.jain919 at gmail.com> wrote:
> >> > I already tried that but I think cmake does not realise -fPIC/fPIE as
> a
> >> > valid option. So it considers that a file exists with the same name
> and
> >> > shows me the following error:
> >> > CMake Error: The source directory
> >> > "/home/devanshu/Documents/PMC/plasma-mediacenter/build/-fPIC" does not
> >> > exist.
> >>
> >> What? no no no,
> >> You must add -fPIC as the CXX_COMPILER_FLAGS, how's your CMakeLists.txt?
> >> It seems that you are adding -fPIC at the wrong location.
> >>
> >> >
> >> > On Thu, Jul 10, 2014 at 8:41 PM, Tomaz Canabrava <tcanabrava at kde.org>
> >> > wrote:
> >> >>
> >> >> Devanshu,
> >> >>
> >> >> I know it's frustrating to begin in a very complex and huge software
> >> >> as KDE and Plasma, belive me - this happened to me 6 years ago.
> >> >> It's very important to try to understand the errors that you have
> >> >> before asking for help, really. Holding hands is cool but not the
> most
> >> >> efficient way to learn.
> >> >>
> >> >> for instance, in the second one
> >> >>
> >> >>  /usr/include/qt5/QtCore/
> >> >> qglobal.h:1008:4: error: #error "You must build your code with
> >> >> position independent code if Qt was built with -reduce-relocations. "
> >> >> "Compile your code with -fPIC or -fPIE."
> >> >>  #  error "You must build your code with position independent code if
> >> >> Qt was built with -reduce-relocations. "\
> >> >>
> >> >> This means that your Qt was build with -reduce-relocations and you
> >> >> must compile your code with -fPIC , as the error says.
> >> >> so, go to your CMake and add -fPIC to the CXX_COMPILER_FLAGS , and
> try
> >> >> again. :)
> >> >>
> >> >> Tomaz
> >> >> _______________________________________________
> >> >> Plasma-devel mailing list
> >> >> Plasma-devel at kde.org
> >> >> https://mail.kde.org/mailman/listinfo/plasma-devel
> >> >
> >> >
> >> >
> >> > _______________________________________________
> >> > Plasma-devel mailing list
> >> > Plasma-devel at kde.org
> >> > https://mail.kde.org/mailman/listinfo/plasma-devel
> >> >
> >> _______________________________________________
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> >> https://mail.kde.org/mailman/listinfo/plasma-devel
> >
> >
> >
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> >
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