On Fri, 3 Dec 2021, 18:58 Dr. Jürgen Sauermann, <m...@juergen-sauermann.de>
wrote:
> Hi,
>
> not sure if this matters or how int can be fixed, but today I observed
> the following:
>
> Your web page says that "Static assertions" are supported by GCC since
> version 4.3.
>
> Today I tried to use "Static assertions" on an avr-g++ resp. avr-gcc
> which identifies
> itself as:
>
> eedjsa@server68:~/projects/AVR_workspace/ATMEGA8U2_32U2$ avr-g++ --version
> avr-g++ (GCC) 5.4.0
> Copyright (C) 2015 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> eedjsa@server68:~/projects/AVR_workspace/ATMEGA8U2_32U2$ avr-gcc --version
> avr-gcc (GCC) 5.4.0
> Copyright (C) 2015 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions. There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
>
> but it seems not to support static assertions.
>
> The "regular" g++ works:
>
> eedjsa@server68:~/projects/AVR_workspace/ATMEGA8U2_32U2$ echo '
> static_assert(0, "error"); int main() {}' | g++ -S -o /dev/null -x c++ -
> <stdin>:2:15: error: static assertion failed: error
>
> while the avr-g++ fails:
>
> eedjsa@server68:~/projects/AVR_workspace/ATMEGA8U2_32U2$ echo '
> static_assert(0, "error"); int main() {}' | avr-g++ -S -o /dev/null -x c++
> -
> <stdin>:2:14: error: expected constructor, destructor, or type
> conversion before ‘(’ token
>
> Maybe this should be mentioned on the web page.
>
Static assertions are a C++11 feature, so you simply need to use -std=c++11
or -std=gnu++11
