Non-DQN kernels (curiosity, PPO, epsilon-greedy, backtest-PPO) include
common_device_functions.cuh but don't define SHARED_H1/SHARED_H2/VALUE_H/ADV_H.
The unguarded q_forward_dueling_warp_shmem() references these constants,
causing nvcc compilation failures (undefined identifiers + cascading
"user-defined literal operator not found" errors).
Wraps the function in #if defined(SHARED_H1) && defined(SHARED_H2) &&
defined(VALUE_H) && defined(ADV_H) ... #endif so it's only compiled
when the DQN architecture constants are injected.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
a2ef8f0871