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CUDA: get header deps from compiler invocation when possible

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Before CUDA 10.2 `nvcc` didn't support providing header dependency
information while compiling.
This commit is contained in:
Robert Maynard
2019-11-29 12:07:31 -05:00
parent 7f15c99851
commit 5341f5e4a1
2 changed files with 9 additions and 2 deletions
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4
Modules/CMakeCUDAInformation.cmake
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@@ -148,11 +148,11 @@ if(NOT CMAKE_CUDA_COMPILE_WHOLE_COMPILATION)
"<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> -x cu -c <SOURCE> -o <OBJECT>")
endif()
if(CMAKE_GENERATOR STREQUAL "Ninja")
if(CMAKE_GENERATOR STREQUAL "Ninja" AND NOT CMAKE_DEPFILE_FLAGS_CUDA )
set(CMAKE_CUDA_COMPILE_DEPENDENCY_DETECTION
"<CMAKE_CUDA_COMPILER> ${_CMAKE_CUDA_EXTRA_FLAGS} <DEFINES> <INCLUDES> <FLAGS> -x cu -M <SOURCE> -MT <OBJECT> -o $DEP_FILE")
#The Ninja generator uses the make file dependency files to determine what
#files need to be recompiled. Unfortunately, nvcc doesn't support building
#files need to be recompiled. Unfortunately, nvcc < 10.2 doesn't support building
#a source file and generating the dependencies of said file in a single
#invocation. Instead we have to state that you need to chain two commands.
#

7
Modules/Compiler/NVIDIA-CUDA.cmake
View File

@@ -18,6 +18,13 @@ else()
set(_CMAKE_CUDA_EXTRA_DEVICE_LINK_FLAGS "")
endif()
if (NOT CMAKE_CUDA_COMPILER_VERSION VERSION_LESS 10.2)
# The -MD flag was only added to nvcc in 10.2 so
# before that we had to invoke the compiler twice
# to get header dependency information
set(CMAKE_DEPFILE_FLAGS_CUDA "-MD -MT <OBJECT> -MF <DEPFILE>")
endif()
if(NOT "x${CMAKE_CUDA_SIMULATE_ID}" STREQUAL "xMSVC")
set(CMAKE_CUDA_COMPILE_OPTIONS_PIE -Xcompiler=-fPIE)
set(CMAKE_CUDA_COMPILE_OPTIONS_PIC -Xcompiler=-fPIC)