masks the ODR violations in the lib-ffmpeg-support module, by forcing -Wno-error=odr
this is a *temporary solution only*, while waiting on the upstream fix currently
being worked on: https://codeberg.org/tenacityteam/tenacity/pulls/418

an ideal solution would fix the violations or introduce namespaces, however
this is not feasible for a patch as the offending files are multiple 5000+ line
headers that declare *all* ffmpeg functions across multiple versions. it's a
truly enormous number of ODR violations, but it shouldn't cause actual runtime
issues, only compiler complaints. once ffmpeg-linking is functional that should
the preferred solution.

diff --git a/libraries/lib-ffmpeg-support/CMakeLists.txt b/libraries/lib-ffmpeg-support/CMakeLists.txt
index 7e76ab997..b2eb6ab6e 100644
--- a/libraries/lib-ffmpeg-support/CMakeLists.txt
+++ b/libraries/lib-ffmpeg-support/CMakeLists.txt
@@ -117,6 +117,8 @@ if (USE_FFMPEG)
       list(APPEND DEFINITIONS PRIVATE _DARWIN_C_SOURCE )
    endif()
 
+   add_compile_options(-Wno-error=odr)
+   add_link_options(-Wno-error=odr)
    tenacity_library( lib-ffmpeg-support "${SOURCES}" "${LIBRARIES}"
       "${DEFINITIONS}" ""
    )