Review Request 123874: Fix build with Qt >= 5.4.2

[Aleix Pol Gonzalez]

> On May 22, 2015, 12:57 a.m., Aleix Pol Gonzalez wrote:
> > I'm unsure this is what you need, builds fine here...
> 
> Hrvoje Senjan wrote:
>     Do you have the mentioned commit? It's in latest 5.4.2 & 5.4 branches, but *not* 5.5

Ah, sorry, I have 5.5.
Anyway, are you sure this is needed? Qt5::Core should drag the definitions as well.
Maybe you just need to fix the check_qt_visibility.cpp try_compile call that's happening there?


- Aleix


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On May 21, 2015, 7:32 p.m., Hrvoje Senjan wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/123874/
> -----------------------------------------------------------
> 
> (Updated May 21, 2015, 7:32 p.m.)
> 
> 
> Review request for Build System, Phonon and Harald Sitter.
> 
> 
> Repository: phonon
> 
> 
> Description
> -------
> 
> Or to be more accurate, with commit 3eca75de67b3fd2c890715b30c7899cebc096fe9
> I am not convinced this is best solution, but requires least changes to current cmake code.
> 
> 
> Diffs
> -----
> 
>   cmake/FindPhononInternal.cmake 44862b5 
> 
> Diff: https://git.reviewboard.kde.org/r/123874/diff/
> 
> 
> Testing
> -------
> 
> Builds with 5.4.2 branch, or mentioned commit backported.
> Otherwise:
> 
> ```
> [  126s] -- Performing Test __KDE_HAVE_GCC_VISIBILITY - Success
> [  126s] Change Dir: /home/abuild/rpmbuild/BUILD/phonon-4.8.3/build/CMakeFiles/CMakeTmp
> [  126s] 
> [  126s] Run Build Command:"/usr/bin/gmake" "cmTryCompileExec3719375587/fast"
> [  126s] /usr/bin/gmake -f CMakeFiles/cmTryCompileExec3719375587.dir/build.make CMakeFiles/cmTryCompileExec3719375587.dir/build
> [  126s] gmake[1]: Entering directory '/home/abuild/rpmbuild/BUILD/phonon-4.8.3/build/CMakeFiles/CMakeTmp'
> [  126s] /usr/bin/cmake -E cmake_progress_report /home/abuild/rpmbuild/BUILD/phonon-4.8.3/build/CMakeFiles/CMakeTmp/CMakeFiles 1
> [  126s] Building CXX object CMakeFiles/cmTryCompileExec3719375587.dir/check_qt_visibility.cpp.o
> [  126s] /usr/bin/c++    -fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -DNDEBUG -Wnon-virtual-dtor -Wno-long-long -Wundef -Wcast-align -Wchar-subscripts -Wall -W -Wpointer-arith -Wformat-security -fno-exceptions -DQT_NO_EXCEPTIONS -fno-check-new -fno-common -Woverloaded-virtual -fvisibility=hidden  -fPIE -I/usr/include/qt5 -I/usr/include/qt5/QtCore -I/usr/lib64/qt5/mkspecs/linux-g++ -I/usr/include/qt5/QtWidgets -I/usr/include/qt5/QtGui    -o CMakeFiles/cmTryCompileExec3719375587.dir/check_qt_visibility.cpp.o -c /home/abuild/rpmbuild/BUILD/phonon-4.8.3/build/CMakeTmp/check_qt_visibility.cpp
> [  126s] In file included from /usr/include/qt5/QtCore/QtGlobal:1:0,
> [  126s]                  from /home/abuild/rpmbuild/BUILD/phonon-4.8.3/build/CMakeTmp/check_qt_visibility.cpp:1:
> [  126s] /usr/include/qt5/QtCore/qglobal.h:1051:4: error: #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)."
> [  126s]  #  error "You must build your code with position independent code if Qt was built with -reduce-relocations. "\
> [  126s]     ^
> [  126s] CMakeFiles/cmTryCompileExec3719375587.dir/build.make:57: recipe for target 'CMakeFiles/cmTryCompileExec3719375587.dir/check_qt_visibility.cpp.o' failed
> [  126s] gmake[1]: Leaving directory '/home/abuild/rpmbuild/BUILD/phonon-4.8.3/build/CMakeFiles/CMakeTmp'
> [  126s] gmake[1]: *** [CMakeFiles/cmTryCompileExec3719375587.dir/check_qt_visibility.cpp.o] Error 1
> [  126s] Makefile:117: recipe for target 'cmTryCompileExec3719375587/fast' failed
> [  126s] gmake: *** [cmTryCompileExec3719375587/fast] Error 2
> [  126s] 
> [  126s] CMake Error at cmake/FindPhononInternal.cmake:416 (message):
> [  126s]   Qt compiled without support for -fvisibility=hidden.  This will break
> [  126s]   plugins and linking of some applications.  Please fix your Qt installation
> [  126s]   (try passing --reduce-exports to configure).
> [  126s] Call Stack (most recent call first):
> [  126s]   CMakeLists.txt:47 (include)
> ```
> 
> 
> Thanks,
> 
> Hrvoje Senjan
> 
>

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