From: Fabrice Fontaine Date: Tue, 21 Aug 2018 21:25:47 +0000 (+0200) Subject: boost: context needs C++11 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f3a483a81be43b0ff674400e11900605969f8f1c;p=buildroot.git boost: context needs C++11 Without std=c++11, mutex is not always correctly detected with gcc 4.7, 4.8 or even 5.x. As a result, boost_thread is wrongly selected by boost_context. mutex is available on gcc 4.7.x, the issue is that boost does not correctly detect it because -std=c++11 was missing. Keep thread select for gcc version lower or equal to 4.6. mutex is available since gcc 4.4 (with std=c++0x) but common buildroot practice for C++11 packages is to have a dependency on gcc 4.7, 4.8 or 4.9 depending on the requested C++11 features. Fixes: - http://autobuild.buildroot.net/results/fb046c04fe18bec973d120e4ab33971f32ba5769 - http://autobuild.buildroot.net/results/99f1a255b78a973faeb8bf3b94d78efc54426a8b Signed-off-by: Fabrice Fontaine Signed-off-by: Thomas Petazzoni --- diff --git a/package/boost/Config.in b/package/boost/Config.in index 389592fd32..e0bff17f75 100644 --- a/package/boost/Config.in +++ b/package/boost/Config.in @@ -83,7 +83,7 @@ config BR2_PACKAGE_BOOST_CONTEXT bool "boost-context" depends on BR2_PACKAGE_BOOST_CONTEXT_ARCH_SUPPORTS depends on !BR2_TOOLCHAIN_HAS_GCC_BUG_64735 - select BR2_PACKAGE_BOOST_THREAD if !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 + select BR2_PACKAGE_BOOST_THREAD if !BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 help C++11 context switching library. diff --git a/package/boost/boost.mk b/package/boost/boost.mk index 0adad89297..2ce6bbb75f 100644 --- a/package/boost/boost.mk +++ b/package/boost/boost.mk @@ -61,6 +61,11 @@ else BOOST_FLAGS += --without-icu endif +# boost-context needs C++11 +ifeq ($(BR2_PACKAGE_BOOST_CONTEXT)$(BR2_TOOLCHAIN_GCC_AT_LEAST_4_7),yy) +BOOST_TARGET_CXXFLAGS += -std=c++11 +endif + ifeq ($(BR2_PACKAGE_BOOST_IOSTREAMS),y) BOOST_DEPENDENCIES += bzip2 zlib endif