Richard, for context, I don't think Boost C++ Libraries can be expected to build without warnings on any compiler these days. There are just too many versions of compilers producing warnings in too many ingenious ways. On 30-Jun-16 11:32 PM, Richard Hadsell wrote:
I have downloaded 1.61.0 and want to build it with Clang. This is in my user-config:
using clang : 3.5.0 : /netDISKS/master/netmt/LINUX_C65/app/clang/3.5.0/bin/clang++ : <compileflags>"-fPIC -gcc-toolchain /netDISKS/master/netmt/LINUX_C65/app/gcc/4.8.3 -Wno-overloaded-virtual -Wno-unused-function -Wno-unused-variable -Wno-c99-extensions -Wno-variadic-macros" <linkflags>"-fPIC -gcc-toolchain /netDISKS/master/netmt/LINUX_C65/app/gcc/4.8.3" ;
When I build, I see warnings like these:
./boost/mpl/print.hpp:50:19: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions] const int m_x = 1 / (sizeof(T) - sizeof(T)); ^ ./boost/timer/timer.hpp:44:43: warning: 'long long' is a C++11 extension [-Wc++11-long-long] void clear() { wall = user = system = 0LL; } ^ ./boost/regex/v4/instances.hpp:124:34: warning: unknown warning group '-Wkeyword-macro', ignored [-Wunknown-pragmas] #pragma clang diagnostic ignored "-Wkeyword-macro"
The warnings above mention the command-line options that will silence the warnings. E.g. if you pass -Wno-keyword-macro, the last warning should go away. Likewise for other warnings. You might consider reporting these warnings to libraries developers.
When I add '-std=c++11' to the <compileflags> and <linkflags>, I get errors and warnings like these:
clang-linux.compile.c.without-pth bin.v2/libs/container/build/clang-linux-3.5.0/release/instruction-set-core2/link-static/threading-multi/alloc_lib.o
error: invalid argument '-std=c++11' not allowed with 'C/ObjC'
Seems like clang is unnecessary pedantic here. Though, I don't know why container includes .c files - might be worth raising an issue too. So, the bottom line is that you either have to live with the warnings, or disable them with '-Wno-*' options. HTH, Volodya