At present any test in Boost.Math that depends on Boost.Test fails for GCC prior to 4.5 because the build script for Boost.Test has:
<toolset>gcc:<cxxflags>-std=gnu++0x
Is this really required? It looks wrong headed to me:
<snip>
Can this be safely removed? Many thanks, John.
These command line switches are a nightmare, but quite useful. I took the time to summarize my own personal guidelines pertaining to GCC C++ language specification in relation to Boost. If anyone would like to extend and/or correct these guidelines for Boost and publish them on the net, it may decrease mixups in this confusing matter. Please don't flame me if I got the guidelines wrong. Rather correct them instead. Sincerely, Chris -------------------------------------------------------------------------- Guidelines on: Selecting the C++ language specification with GCC GCC supports finely granulated selection of the underlying C++ language specification With command line options. The command line option -std=c++98 selects language conformance with ISO/IEC 14882:1998, also known as C++98. The command line option -std=c++03 selects language conformance with ISO/IEC 14882:2003, also known as C++03. The command line option -std=c++11 selects language conformance with ISO/IEC 14882:2011, also known as C++11. In general, Boost libraries should be compatible with C++03 and use -std=c++03 accordingly. Important: Please avoid using -std=c++11, -std=gnu++11, and -std=gnu++0x. These command line arguments activate GCC's experimental support for C++11. There is not yet a consensus on using C++11 in Boost libraries off-the-rack. GCC also has the similar language options -std=gnu++98, -std=gnu++03, -std=gnu++11, and -std=gnu++0x. These command line options activate certain GNU-specific language extensions. Please avoid using them because their use can lead to non-portability issues. The GCC command line option -std=c++0x was an interim solution used for preliminary support support for C++11 features before these were published by ISO. As of GCC 4.7, the command line option -std=c++0x has been replaced with -std=c++11. If possible, preferentially use -std=C++11 instead of -std=c++0x when testing for C++11 compatibility. This rational for this is that -std=c++0x can easily be confused with, for example, -std=c++03. Do note, however, that Boost libraries should not yet rely on C++11 via the -std=c++11 switch for their build and/or usage. In general, then, please use -std=c++03.