Re: [Boost-users] [signals2] compilation issues with gcc4.4 and -pedantic

On Thu, May 12, 2011 at 4:50 PM, sguazt wrote:

On Thu, May 12, 2011 at 11:03 AM, Christophe Bourez wrote:

...

The following code:

#include int main(int , char *[]) { return 0; }

compiles fine with gcc-4.1 and gcc-4.2 and the -pedantic option, but generates the following errors using gcc-4.4 with the same compiling options:

/home/build/repository/boost-1.46.1-2/gcc-4.4/include/boost/signals2/detail/preprocessed_arg_type_template.hpp:21: error: invoking macro BOOST_SIGNALS2_PREFIXED_ARGS_TEMPLATE_DECL argument 2: empty macro arguments are undefined in ISO C90 and ISO C++98 /home/build/repository/boost-1.46.1-2/gcc-4.4/include/boost/signals2/detail/preprocessed_arg_type_template.hpp:21: error: invoking macro BOOST_PP_CAT argument 1: empty macro arguments are undefined in ISO C90 and ISO C++98 /home/build/repository/boost-1.46.1-2/gcc-4.4/include/boost/signals2/detail/preprocessed_arg_type_template.hpp:21: error: invoking macro BOOST_PP_CAT_I argument 1: empty macro arguments are undefined in ISO C90 and ISO C++98

Adding the option -std=c++0x removes these errors, but I am supporting legacy code that does not compile with -std=c++0x

Is there any workaround or patch I could apply ?

Hi,

I don't get the error of the OP, but (after having done svn "update") if now I try to compile the above code with GCC 4.5.1, I get another error:

[cut]

Cheers,

Sorry, I've just redone "svn update" and now with the new changes all work fine. Thank you very much! Best, -- Marco