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Subject: Re: undetectable libraries
To: Juan carlos Rebate <nerus492@gmail.com>, cygwin@cygwin.com
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Am 28.08.2020 um 00:51 schrieb Juan carlos Rebate via Cygwin:

> good evening, I have a strange problem, I try to compile code that
> uses gtk3 and sdl2 in addition to curl, 

Would you mind revealing what code that is?

> the problem is that when I
> invoke the gcc compiler it tells me that sdl2-devel and libcurl are
> not installed, but actually yes are.

I'm pretty sure that GCC would never tell you those particular things. 
It would tell you which files it cannot find, but not which package 
they're supposed to be from.

> ./configure --cross-prefix=x86_64-w64-mingw32- --enable-sdl
> --enable-gtk --enable-curl

That configure call looks strange, particularly the --cross-prefix part. 
The usual way of asking configure to build for a target platform other 
than the build host would look more like this:

   ./configure --host=x86_64-w64-mingw32

The actual output from your configure run, and/or the generated 
config.log file would almost certainly be more helpful than further 
speculation about the details of cygwin setup usage.