BOOST_FT_AUTODETECT_CALLING_CONVENTIONS ignored when including <boost/uuid/random_generator.hpp>

[tobias-loew]

Hi,

I' ve got a project which uses Boost.UUID and function_types.
When compiling for Windows-x86 I define BOOST_FT_AUTODETECT_CALLING_CONVENTIONS before including
<boost/uuid/random_generator.hpp>
thereafter I include
<boost/function_types/config/config.hpp>

but then "boost::function_types::stdcall_cc" is not defined.
There seems to be a problem with the define/undef of the macro "callable_builtin" in <boost/function_types/detail/encoding/aliases_[un]def.hpp>

When I first include <boost/function_types/config/config.hpp>the type "boost::function_types::stdcall_cc" is defined.
I'm not sure if the define/undef of the macro "callable_builtin" could even violate ODR.

[Abhibalu123]

Hi! I would like to work on this issue can you suggest me ways to get started?

[tobias-loew]

@Abhibalu123: The following code shows the problem: when compiled with Visual Studio 2019 (or 2017, 2015), Win32-x86 and only "CASE_WITH_UUID_FAILS" defined then boost::function_types::stdcall_cc is not defined.
Please let me know, if you need more information.
Thanks!

//#define CASE_WITHOUT_UUID_OK
#define CASE_WITH_UUID_FAILS
//#define CASE_WITH_FUNCTION_CONFIG_AND_UUID_OK


#define BOOST_FT_AUTODETECT_CALLING_CONVENTIONS

#include <boost/config.hpp>

#ifdef CASE_WITHOUT_UUID_OK
#endif


#ifdef CASE_WITH_UUID_FAILS
#include <boost/uuid/random_generator.hpp>
#endif


#ifdef CASE_WITH_FUNCTION_CONFIG_AND_UUID_OK
#include <boost/function_types/config/config.hpp>
#include <boost/uuid/random_generator.hpp>
#endif


#include <boost/function_types/function_type.hpp>

int main()
{
    using cc = boost::function_types::stdcall_cc;
}

[jeking3]

Perhaps the property_tags.hpp header in this repository does not include config when it should?

see: boostorg/uuid#114 (comment)