commit e966180fbba1812f8050a743351036d573c19b1f Author: Ryan Hill Date: Sun Sep 13 06:17:43 2015 -0600 Fix build failure with GCC 5 and Qt 5.4.2. Recent versions of GCC (>=5.1) will sometimes emit copy relocations when compiling with -fPIE, which causes some Qt applications to crash. As of 5.4.2 all code built against Qt must instead be compiled with -fPIC. Enabling CMAKE_POSITION_INDEPENDENT_CODE will cause cmake to add -fPIC or -fPIE depending on the type of object being built. The try_compile() test for -fvisibility=hidden support is creating an executable so -fPIE is used which makes Qt throw a fit. Gentoo-Bug: https://bugs.gentoo.org/555866 See-Also: https://bugreports.qt.io/browse/QTBUG-45755 --- cmake/FindPhononInternal.cmake | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/cmake/FindPhononInternal.cmake +++ b/cmake/FindPhononInternal.cmake @@ -109,8 +109,8 @@ else (NOT PHONON_BUILD_PHONON4QT5) # Qt5 find_package(Qt5Widgets) macro_log_feature(Qt5Widgets_FOUND "Qt5 Widgets (qtbase)" "" "" TRUE) - if (Qt5_POSITION_INDEPENDENT_CODE) - set(CMAKE_POSITION_INDEPENDENT_CODE ON) + if(Qt5_POSITION_INDEPENDENT_CODE AND CMAKE_CXX_COMPILE_OPTIONS_PIC) + set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_COMPILE_OPTIONS_PIC}") endif() #---- compat