fix build errors in cuda 10.2

693aa0a7 · Davis King · c7062aa3 · 693aa0a7
Commit 693aa0a7 authored May 14, 2020 by Davis King
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dlib/CMakeLists.txt dlib/CMakeLists.txt +7 -0

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--- a/dlib/CMakeLists.txt
+++ b/dlib/CMakeLists.txt
@@ -633,6 +633,13 @@ if (NOT TARGET dlib)
               endif()
            endif()

+            if (CUDA_VERSION VERSION_EQUAL 10.2)
+               # To avoid this error from nvcc:  
+               #    error: calling a constexpr __host__ function("log1p") from a __device__ function("cuda_log1pexp") 
+               #    is not allowed. The experimental flag '--expt-relaxed-constexpr' can be used to allow this.
+               # which is a bug in nvcc in this version of cuda.
+               list(APPEND FLAGS_FOR_NVCC "--expt-relaxed-constexpr")
+            endif()

            set(CUDA_HOST_COMPILATION_CPP ON)
            # Note that we add __STRICT_ANSI__ to avoid freaking out nvcc with gcc specific