CUDA: Add basic CUDA language support for *NIX systems.

1 files changed, 58 insertions, 0 deletions

diff --git a/Modules/CMakeTestCUDACompiler.cmake b/Modules/CMakeTestCUDACompiler.cmake
new file mode 100644
index 0000000000..e45d2aba72
--- /dev/null
+++ b/Modules/CMakeTestCUDACompiler.cmake
@@ -0,0 +1,58 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+if(CMAKE_CUDA_COMPILER_FORCED)
+  # The compiler configuration was forced by the user.
+  # Assume the user has configured all compiler information.
+  set(CMAKE_CUDA_COMPILER_WORKS TRUE)
+  return()
+endif()
+
+include(CMakeTestCompilerCommon)
+
+# Remove any cached result from an older CMake version.
+# We now store this in CMakeCUDACompiler.cmake.
+unset(CMAKE_CUDA_COMPILER_WORKS CACHE)
+
+# This file is used by EnableLanguage in cmGlobalGenerator to
+# determine that that selected cuda compiler can actually compile
+# and link the most basic of programs.   If not, a fatal error
+# is set and cmake stops processing commands and will not generate
+# any makefiles or projects.
+if(NOT CMAKE_CUDA_COMPILER_WORKS)
+  PrintTestCompilerStatus("CUDA" "")
+  file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/main.cu
+    "#ifndef __CUDACC__\n"
+    "# error \"The CMAKE_CUDA_COMPILER is set to an invalid CUDA compiler\"\n"
+    "#endif\n"
+    "int main(){return 0;}\n")
+
+  try_compile(CMAKE_CUDA_COMPILER_WORKS ${CMAKE_BINARY_DIR}
+    ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/main.cu
+    OUTPUT_VARIABLE __CMAKE_CUDA_COMPILER_OUTPUT)
+
+  # Move result from cache to normal variable.
+  set(CMAKE_CUDA_COMPILER_WORKS ${CMAKE_CUDA_COMPILER_WORKS})
+  unset(CMAKE_CUDA_COMPILER_WORKS CACHE)
+  set(CUDA_TEST_WAS_RUN 1)
+endif()
+
+if(NOT CMAKE_CUDA_COMPILER_WORKS)
+  PrintTestCompilerStatus("CUDA" " -- broken")
+  file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
+    "Determining if the CUDA compiler works failed with "
+    "the following output:\n${__CMAKE_CUDA_COMPILER_OUTPUT}\n\n")
+  message(FATAL_ERROR "The CUDA compiler \"${CMAKE_CUDA_COMPILER}\" "
+    "is not able to compile a simple test program.\nIt fails "
+    "with the following output:\n ${__CMAKE_CUDA_COMPILER_OUTPUT}\n\n"
+    "CMake will not be able to correctly generate this project.")
+else()
+  if(CUDA_TEST_WAS_RUN)
+    PrintTestCompilerStatus("CUDA" " -- works")
+    file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
+      "Determining if the CUDA compiler works passed with "
+      "the following output:\n${__CMAKE_CUDA_COMPILER_OUTPUT}\n\n")
+  endif()
+endif()
+
+unset(__CMAKE_CUDA_COMPILER_OUTPUT)