FindRuby: Restore compatibility variable RUBY_INCLUDE_PATH
Since commit e672db628b (FindRuby: Rename variables to match case of
module name, 2020-03-11, v3.18.0-rc1~546^2), the result variables named
with the old `RUBY_` prefix are provided by compatibility code that maps
from the new `Ruby_` prefix variables. There is no `Ruby_INCLUDE_PATH`
variable, so do not try to map it to `RUBY_INCLUDE_PATH`. The latter is
provided by dedicated compatibility code left from before that
transition.
Fixes: #21064
diff --git a/Modules/FindRuby.cmake b/Modules/FindRuby.cmake
index 1bdee60..3b8122e 100644
--- a/Modules/FindRuby.cmake
+++ b/Modules/FindRuby.cmake
@@ -50,7 +50,7 @@
Also:
-``Ruby_INCLUDE_PATH``
+``RUBY_INCLUDE_PATH``
same as Ruby_INCLUDE_DIRS, only provided for compatibility reasons, don't use it
Hints
@@ -493,7 +493,6 @@
Ruby_VERSION_MAJOR
Ruby_VERSION_MINOR
Ruby_VERSION_PATCH
- Ruby_INCLUDE_PATH
Ruby_ARCH_DIR
Ruby_ARCH
