c++ - How to detect Cross GCC compiler using Macros -


i found interesting article: c/c++ tip: how detect compiler name , version using compiler predefined macros

is possible detect using macro if current compiler cross gcc (the 1 used default eclipse cdt)?

it easy detect, if compiling e.g. arm, not possible detect macro, if compiling arm on arm or cros-compiling on x86.

you need support in build system , pass variable compiler

gcc -dis_crosscompiling=1

using gcc dump preprocessor defines check output of cross compiler , system compiler. there lot of defines nothing cross compilation.

according http://www.gnu.org/software/automake/manual/html_node/cross_002dcompilation.html autotools performing check

checking whether cross compiling... yes

and hope result can made visible gcc.

you can run ugly command check sort of cross compilation

gcc -march=native -e - < /dev/null

this command fail, if cross compiler different architecture, not fail, if different operating system.


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