Hmmm.. Didn't get any notification from the boards that there where answers. Thanks for this answer. I did not see it was a combined package.
I'm installing the Xcode tools now and see if the library is installed after that. :-)
The installation was successful, so that's a win.
However when I try something, I get errors.
ld: warning: object file (/var/folders/2j/sl_kv1311vggqj0m8jy3_w7w0000gn/T/go-link-2730612095/000011.o) was built for newer macOS version (12.0) than being linked (11.0)
ld: warning: object file (/var/folders/2j/sl_kv1311vggqj0m8jy3_w7w0000gn/T/go-link-2730612095/000012.o) was built for newer macOS version (12.0) than being linked (11.0)
dlopen err: dlopen(liblcl.dylib, 0x0009): tried: 'liblcl.dylib' (no such file), '/usr/local/lib/liblcl.dylib' (no such file), '/usr/lib/liblcl.dylib' (no such file), '/Users/marcelloh/data/go-private/Test/liblcl.dylib' (no such file), '/usr/local/lib/liblcl.dylib' (no such file), '/usr/lib/liblcl.dylib' (no such file)
panic: dlopen("liblcl.dylib"), failed.