tree 2b022e21df6ec7e03bde35979bb235c363ca165c
parent af39e3b9eeb32493abd89f40de4420587774ccc7
author Sergiu Deitsch <sergiu.deitsch@gmail.com> 1740001815 +0100
committer Sergiu Deitsch <sergiu.deitsch@gmail.com> 1740009257 -0800

Do not discard caller's CMAKE_MODULE_PATH

Ceres CMake package configuration relies on several own find modules
(e.g., for SuiteSparse and METIS). To allow CMake to discover additional
find modules, the CMAKE_MODULE_PATH variable must be updated to include
the directories containing the corresponding find modules.

Previously, before updating CMAKE_MODULE_PATH, Ceres stored the
variable's initial value and then completely replaced it by the
directory containing Ceres's modules. However, a find_dependency failure
would cause an early return preventing CMAKE_MODULE_PATH to be restored.
Thus, any initial user changes to CMAKE_MODULE_PATH would be lost.

Now, instead of completely replacing the CMAKE_MODULE_PATH value we only
prepend additional directories. An early return no longer has a
destructive effect on CMAKE_MODULE_PATH. In a failure case,
CMAKE_MODULE_PATH still contains caller's initial set of directories and
an additional path prepended by Ceres.

Fixes #1024

Change-Id: I80d92a5dff9f3cff651f950c4f8d04ece008b44b