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CUDA: Compilers can now state they don't require a device linking step

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This commit is contained in:
Robert Maynard
2019-08-06 15:04:59 -04:00
parent fdaad9a067
commit a233e4e7d9
4 changed files with 17 additions and 6 deletions
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14
Help/prop_tgt/CUDA_RESOLVE_DEVICE_SYMBOLS.rst
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@@ -1,12 +1,16 @@
CUDA_RESOLVE_DEVICE_SYMBOLS
---------------------------
CUDA only: Enables device linking for the specific library target
CUDA only: Enables device linking for the specific library target where
required.
If set this will enable device linking on the library target. Normally
device linking is deferred until a shared library or executable is generated,
allowing for multiple static libraries to resolve device symbols at the same
time when they are used by a shared library or executable.
If set, this will tell the required compilers to enable device linking
on the library target. Device linking is an additional link step
required by some CUDA compilers when :prop_tgt:`CUDA_SEPARABLE_COMPILATION` is
enabled. Normally device linking is deferred until a shared library or
executable is generated, allowing for multiple static libraries to resolve
device symbols at the same time when they are used by a shared library or
executable.
By default static library targets have this property is disabled,
while shared, module, and executable targets have this property enabled.

3
Modules/CMakeCUDAInformation.cmake
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@@ -171,7 +171,8 @@ if(NOT CMAKE_CUDA_LINK_EXECUTABLE)
"<CMAKE_CUDA_HOST_LINK_LAUNCHER> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>${__IMPLICT_LINKS}")
endif()
if(CMAKE_CUDA_COMPILER_VERSION VERSION_GREATER_EQUAL "8.0.0")
if( CMAKE_CUDA_COMPILER_ID STREQUAL "NVIDIA" AND
CMAKE_CUDA_COMPILER_VERSION VERSION_GREATER_EQUAL "8.0.0")
set(_CMAKE_CUDA_EXTRA_DEVICE_LINK_FLAGS "-Wno-deprecated-gpu-targets")
else()
set(_CMAKE_CUDA_EXTRA_DEVICE_LINK_FLAGS "")

1
Modules/Compiler/NVIDIA-CUDA.cmake
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@@ -1,3 +1,4 @@
set(CMAKE_CUDA_COMPILER_HAS_DEVICE_LINK_PHASE True)
set(CMAKE_CUDA_VERBOSE_FLAG "-v")
set(CMAKE_CUDA_VERBOSE_COMPILE_FLAG "-Xcompiler=-v")

5
Source/cmLinkLineDeviceComputer.cxx
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@@ -13,6 +13,7 @@
#include "cmGeneratorTarget.h"
#include "cmGlobalGenerator.h"
#include "cmLocalGenerator.h"
#include "cmMakefile.h"
#include "cmStateDirectory.h"
#include "cmStateSnapshot.h"
#include "cmStateTypes.h"
@@ -156,6 +157,10 @@ bool requireDeviceLinking(cmGeneratorTarget& target, cmLocalGenerator& lg,
return false;
}
if (!lg.GetMakefile()->IsOn("CMAKE_CUDA_COMPILER_HAS_DEVICE_LINK_PHASE")) {
return false;
}
if (const char* resolveDeviceSymbols =
target.GetProperty("CUDA_RESOLVE_DEVICE_SYMBOLS")) {
// If CUDA_RESOLVE_DEVICE_SYMBOLS has been explicitly set we need