Jörg Krause 5d043799cd libupnpp: needs gcc >= 4.9 ... After bumping libupnpp from version 0.15.1 to 0.15.2 compilation fails for toolchains using GCC 4.7: ``` libupnpp/control/discovery.cxx: In constructor 'UPnPClient::UPnPDeviceDirectory::UPnPDeviceDirectory(time_t)': libupnpp/control/discovery.cxx:338:5: error: 'yield' is not a member of 'std::this_thread' ``` Before version 0.15.2, libupnpp used sched_yield() which was replaced by `std::this_thread::yield()` in the new version. Looking at the `<thread>` header file of the PowerPC toolchain [1] from the autobuilder shows that `yield()` is only enabled if `_GLIBCXX_USE_SCHED_YIELD` is defined: ``` /// yield inline void yield() noexcept { __gthread_yield(); } ``` Note, that `__gthread_yield()` inlines to a call to `sched_yield()`: ``` static inline int __gthread_yield (void) { return __gthrw_(sched_yield) (); } ``` This macro is only defined if GCC was built with `--enable-libstdcxx-time`, which is obviously not the case for the affected toolchains. For GCC 4.7 and below this option defaults to no, which means `sched_yield()` is not enabled though it is be available. The issue was discussed on stackoverflow [2]. In GCC 4.9.0 the issue has been fixed, by automatically enabling `sched_yield()` on platforms that are known to support them. Therefore, we update the dependency to GCC 4.9. Fixes: http://autobuild.buildroot.net/results/506/50670d8119b4fbd26585d3d9bd646adb1d904dbe/ http://autobuild.buildroot.net/results/8b0/8b021648a073bde25dd6936ed1ea1e39977bf89b/ http://autobuild.buildroot.net/results/b6d/b6d7437e1cf8cf0b3726395401ac4ebd9af2833b/ http://autobuild.buildroot.net/results/0bf/0bf84f61a72a65a75c5fd0a787680f483cfead26/ .. and more. [1] http://autobuild.buildroot.org/toolchains/tarballs/powerpc-ctng_e500v2-linux-gnuspe.tar.xz [2] https://stackoverflow.com/a/12961816 Signed-off-by: Jörg Krause <joerg.krause@embedded.rocks> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>		2017-06-07 21:57:33 +02:00
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Config.in	libupnpp: needs gcc >= 4.9	2017-06-07 21:57:33 +02:00
libupnpp.hash
libupnpp.mk