D17930: Be less memory-hungry when compiling the Keyboard KCM's gemoetry parser

[Nathaniel Graham]

ngraham created this revision.
ngraham added reviewers: Plasma, hein, davidedmundson, bshah.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
ngraham requested review of this revision.

REVISION SUMMARY
  The current recursion depth of 512 is rather large and causes out-of-memory errors on even fairly beefy machines.
  
  This patch reduces the recursion limit to 64, which allows plasma-desktop to be compiled on a test of a simulated very low-end machine in a VM: 2 processors with 2 GB RAM.
  
  BUG: 362946
  FIXED-IN: 5.12.8

TEST PLAN
  Compile plasma-desktop on the above-mentioned VM without first disabling this feature ot not building the keyboard KCM. It works!

REPOSITORY
  R119 Plasma Desktop

BRANCH
  geometry-parser-compilation-fix (branched from Plasma/5.12)

REVISION DETAIL
  https://phabricator.kde.org/D17930

AFFECTED FILES
  kcms/keyboard/CMakeLists.txt

To: ngraham, #plasma, hein, davidedmundson, bshah
Cc: plasma-devel, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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