Bug 2955. Workaround for lack of atomic operations in GCCE standard libraries (fall back to default use of Mutex)
contains(QT_CONFIG, opengles1) {
INCLUDEPATH += $$QMAKE_INCDIR_OPENGL_ES1
!isEmpty(QMAKE_LIBDIR_OPENGL_ES1):QMAKE_LIBDIR += $$QMAKE_LIBDIR_OPENGL_ES1
target_qt:LIBS_PRIVATE += $$QMAKE_LIBS_OPENGL_ES1
else:LIBS += $$QMAKE_LIBS_OPENGL_ES1
} else:contains(QT_CONFIG, opengles1cl) {
INCLUDEPATH += $$QMAKE_INCDIR_OPENGL_ES1CL
!isEmpty(QMAKE_LIBDIR_OPENGL_ES1CL):QMAKE_LIBDIR += $$QMAKE_LIBDIR_OPENGL_ES1CL
target_qt:LIBS_PRIVATE += $$QMAKE_LIBS_OPENGL_ES1CL
else:LIBS += $$QMAKE_LIBS_OPENGL_ES1CL
} else:contains(QT_CONFIG, opengles2) {
INCLUDEPATH += $$QMAKE_INCDIR_OPENGL_ES2
!isEmpty(QMAKE_LIBDIR_OPENGL_ES2):QMAKE_LIBDIR += $$QMAKE_LIBDIR_OPENGL_ES2
target_qt:LIBS_PRIVATE += $$QMAKE_LIBS_OPENGL_ES2
else:LIBS += $$QMAKE_LIBS_OPENGL_ES2
} else {
INCLUDEPATH += $$QMAKE_INCDIR_OPENGL
!isEmpty(QMAKE_LIBDIR_OPENGL):QMAKE_LIBDIR += $$QMAKE_LIBDIR_OPENGL
target_qt:LIBS_PRIVATE += $$QMAKE_LIBS_OPENGL_QT
else:LIBS += $$QMAKE_LIBS_OPENGL
}