Hi Dave,

Do you want me to follow the steps 7-10 (https://gcc-newbies-guide.readthedocs.io/en/latest/how-to-improve-the-location-of-a-diagnostic.html) or tell you where I add the code simply? Basically, I added

warning_at (DECL_SOURCE_LOCATION (node->decl), 0, "hello world, I’m compiling %qE", node->decl);

to the loop of cgraph_node inside impl_run_checkrs (logger *logger) of analyzer/engine.cc <http://engine.cc/>. 

(I also tried adding this code to cgraph_node::cgraphunit.cc <http://cgraphunit.cc/> in cgraphunit.cc <http://cgraphunit.cc/>, and then I found out the warning_at is different in that scope…but inform would work.)

Best,
Shengyu

P.S. Shall I continue put mailing list in my cc? Not sure the community wants to receive that many GSoC related emails.

> On 22 Feb 2023, at 16:43, David Malcolm <dmalcolm@redhat.com> wrote:
> 
> Sorry, I was unclear; I was referring to this part of my guide:
> https://gcc-newbies-guide.readthedocs.io/en/latest/getting-started.html#hello-world-from-the-compiler
> 
> i.e. try writing a new warning that simply emits something like:
> 
> test.c:2:1: warning: hello world, I'm compiling 'main'
>    2 | int main ()
>      |     ^~~~
> 
> for each function that it sees.