On Tue, 1 Oct 2019 at 01:25, Edward Diener wrote: > How do I find out, for a given gcc compiler product such as gcc-9.2, > what the gnu extensions are when I specify '-std=c++nn' and when I > specify '-std=gnu++nn' for any given valid 'nn' ? When I look in the > documentation for '-std' in gcc-9.2 the only explanation I can see at > https://gcc.gnu.org/onlinedocs/gcc-9.2.0/gcc/C-Dialect-Options.html#C-Dialect-Options > does not give me that information. Does it exist somewhere online or in > the gcc docs ? The documented extensions (and when they are enabled) are covered in https://gcc.gnu.org/onlinedocs/gcc-9.2.0/gcc/#toc-Extensions-to-the-C-Language-Family and https://gcc.gnu.org/onlinedocs/gcc-9.2.0/gcc/#toc-Extensions-to-the-C_002b_002b-Language (or just search for "extensions" in the TOC).
