tree 858d3199e2af149197b86b1ba91042cf55197b5b
parent dde97681e9eabcb6aada1d5d2d90a9b34beddc0f
author Mike Gelfand <mikedld@mikedld.com> 1595887513 +0300
committer Brad King <brad.king@kitware.com> 1595941783 -0400

FindCURL: Fix list index check after search

Fix logic added by commit fc5afbe970 (FindCURL: support COMPONENTS to
check features, 2018-11-28, v3.14.0-rc1~287^2~2).

When searching for particular components and `curl-config` reports one of
the components being searched for first in the list, `find_package` fails.
This is due to the check that treats non-zero index in the list as success
and zero index as failure, while documentation on `list(FIND)` states that
failure to find an element results in return value of -1 (not 0). I'm
hitting this when building cURL with support for HTTP and HTTPS protocols
only, and then trying to `find_package(CURL COMPONENTS HTTP HTTPS)`.

I'm using `if(NOT x EQUAL -1)` check form as it appears to be the most used
throughout the modules.

While fixing this issue I've looked through all the uses of `list(FIND)` in
other modules but wasn't able to find improper use except here.