[undecisive]

To compile it you'll need to tell it to link to libcurl, e.g. with -lcurl on gcc:

    curl https://ifconfig.me --libcurl ip_fetcher.c 
    # Output: your ip address, and a file ip_fetcher.c

    gcc -o ip_fetcher ip_fetcher.c -lcurl
    # Output: no errors, just a file ip_fetcher

    ./ip_fetcher
    # Output: your ip address

(I'm sure most people are saying "no duh" right now, but I'm probably not the only one on here who doesn't write C code every day!)

[chungy]

It might be even easier this way:

    $ curl https://ifconfig.me --libcurl ip_fetcher.c
    $ make LDFLAGS=-lcurl ip_fetcher
    $ ./ip_fetcher

(I just find make a heck of a lot easier than running direct cc commands)

[undecisive]

TIL - I have never used make without a Makefile! Thank you!