[cmake][addons] allow passing extra args to built addon dependencies

Allows a user to pass through cmake arguments to all addon dependencies that are built
Be aware, this is a global addition, and will be passed through to all addons built.

Usage:

-DADDON_EXTRA_ARGS="-Ddefine1=1 -Ddefine2=2"

The arguments will be passed through as a list (ie -Ddefine1=1;-Ddefine2=2) to all
addon dependencies built, and will be accessible via their CMakelists.txt files

an example is with visualization.projectm. If a user wishes to set -DAPP_RENDER_SYSTEM=gles
for the projectm dependency to build projectm as gles compatible.

Currently this can be done with a toolchain file, but a user cant set -DAPP_RENDER_SYSTEM=gles
as art of their cmake stanza to build the addon, as dependencies are passed through filtered
lists, of which APP_RENDER_SYSTEM isnt specifically passed through.

https://github.com/xbmc/visualization.projectm/issues/87

This solution provides a more generic way to pass through arguments to cmake dependencies
without us explicitly handling each option in HandleDepends.cmake

1 files changed, 6 insertions, 0 deletions

diff --git a/cmake/scripts/common/HandleDepends.cmake b/cmake/scripts/common/HandleDepends.cmake
index 8e0f6d6565..dc022bab64 100644
--- a/cmake/scripts/common/HandleDepends.cmake
+++ b/cmake/scripts/common/HandleDepends.cmake
@@ -99,6 +99,12 @@ function(add_addon_depends addon searchpath)
           message(${BUILD_ARGS})
         endif()
 
+        if(ADDON_EXTRA_ARGS)
+          string(REPLACE " " ";" ADDON_EXTRA_ARGS ${ADDON_EXTRA_ARGS})
+          list(APPEND BUILD_ARGS ${ADDON_EXTRA_ARGS})
+          message("Addon Extra Args: ${ADDON_EXTRA_ARGS}")
+        endif()
+
         # used for addons where need special folders to store there content (if
         # not set the addon define it byself).
         # e.g. Google Chromium addon where his git bring: