How to compiling use CUDA nvcc with Xcode7.0 clang 7.0.0

How-to-building-CUDA7.5-with-clang7.0.0.md

CUDA7.5

Now, CUDA did not compatible Apple clang 7.0.0 also Xcode7.0.

e.g,

> cd /Developer/NVIDIA/CUDA-7.5/samples/0_Simple/asyncAPI

> clang -v
Apple LLVM version 7.0.0 (clang-700.1.75)
Target: x86_64-apple-darwin15.0.0
Thread model: posix

> make
/Developer/NVIDIA/CUDA-7.5/bin/nvcc -ccbin clang++ -I../../common/inc  -m64  -Xcompiler -arch -Xcompiler x86_64  -gencode arch=compute_20,code=sm_20 -gencode arch=compute_30,code=sm_30 -gencode arch=compute_35,code=sm_35 -gencode arch=compute_37,code=sm_37 -gencode arch=compute_50,code=sm_50 -gencode arch=compute_52,code=sm_52 -gencode arch=compute_52,code=compute_52 -o asyncAPI.o -c asyncAPI.cu
nvcc fatal   : The version ('70000') of the host compiler ('Apple clang') is not supported
Makefile:229: recipe for target 'asyncAPI.o' failed
make: *** [asyncAPI.o] Error 1

nvcc fatal : The version ('70000') of the host compiler ('Apple clang') is not supported

CUDA(nvcc) is parsed clang version.
but,

# Swich clang to version 602.0.53(based on LLVM 3.6.0svn) in Xcode 6.4
> export PATH=/Applications/Xcode-6.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin:/usr/local/bin:/usr/bin:/usr/sbin:/usr/local/var/rbenv/shims:/sbin

> make
/Developer/NVIDIA/CUDA-7.5/bin/nvcc -ccbin clang++ -I../../common/inc  -m64  -Xcompiler -arch -Xcompiler x86_64  -gencode arch=compute_20,code=sm_20 -gencode arch=compute_30,code=sm_30 -gencode arch=compute_35,code=sm_35 -gencode arch=compute_37,code=sm_37 -gencode arch=compute_50,code=sm_50 -gencode arch=compute_52,code=sm_52 -gencode arch=compute_52,code=compute_52 -o asyncAPI.o -c asyncAPI.cu
/Developer/NVIDIA/CUDA-7.5/bin/nvcc -ccbin clang++   -m64  -Xcompiler -arch -Xcompiler x86_64  -Xlinker -rpath -Xlinker /Developer/NVIDIA/CUDA-7.5/lib  -gencode arch=compute_20,code=sm_20 -gencode arch=compute_30,code=sm_30 -gencode arch=compute_35,code=sm_35 -gencode arch=compute_37,code=sm_37 -gencode arch=compute_50,code=sm_50 -gencode arch=compute_52,code=sm_52 -gencode arch=compute_52,code=compute_52 -o asyncAPI asyncAPI.o
mkdir -p ../../bin/x86_64/darwin/release
cp asyncAPI ../../bin/x86_64/darwin/release

Successful make.

nvcc actual situation

nvcc is parsed version from a current clang binary.
e.g,

> export PATH=/usr/local/bin:/usr/bin:/usr/sbin:/usr/local/var/rbenv/shims:/sbin

> clang -v
# My /usr/local/bin/clang is LLVM clang
clang version 3.8.0 (git@github.com:llvm-mirror/clang.git 1082a41a5196e0fdddf1af1aa388af197cfc4514) (git@github.com:llvm-mirror/llvm.git 60fe48f86639ab4472d186bc97e7676f269cae18)
Target: x86_64-apple-darwin15.0.0
Thread model: posix
InstalledDir: /usr/local/bin

> make
/Developer/NVIDIA/CUDA-7.5/bin/nvcc -ccbin clang++ -I../../common/inc  -m64  -Xcompiler -arch -Xcompiler x86_64  -gencode arch=compute_20,code=sm_20 -gencode arch=compute_30,code=sm_30 -gencode arch=compute_35,code=sm_35 -gencode arch=compute_37,code=sm_37 -gencode arch=compute_50,code=sm_50 -gencode arch=compute_52,code=sm_52 -gencode arch=compute_52,code=compute_52 -o asyncAPI.o -c asyncAPI.cu
nvcc fatal   : The version ('30800') of the host compiler ('clang') is not supported
Makefile:229: recipe for target 'asyncAPI.o' failed
make: *** [asyncAPI.o] Error 1

nvcc fatal : The version ('30800') of the host compiler ('clang') is not supported

...
That means...?

> export PATH=/Applications/Xcode-6.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin:/usr/local/bin:/usr/bin:/usr/sbin:/usr/local/var/rbenv/shims:/sbin

> CC=/usr/bin/clang CXX=/usr/bin/clang++ make
/Developer/NVIDIA/CUDA-7.5/bin/nvcc -ccbin clang++ -I../../common/inc  -m64  -Xcompiler -arch -Xcompiler x86_64  -gencode arch=compute_20,code=sm_20 -gencode arch=compute_30,code=sm_30 -gencode arch=compute_35,code=sm_35 -gencode arch=compute_37,code=sm_37 -gencode arch=compute_50,code=sm_50 -gencode arch=compute_52,code=sm_52 -gencode arch=compute_52,code=compute_52 -o asyncAPI.o -c asyncAPI.cu
/Developer/NVIDIA/CUDA-7.5/bin/nvcc -ccbin clang++   -m64  -Xcompiler -arch -Xcompiler x86_64  -Xlinker -rpath -Xlinker /Developer/NVIDIA/CUDA-7.5/lib  -gencode arch=compute_20,code=sm_20 -gencode arch=compute_30,code=sm_30 -gencode arch=compute_35,code=sm_35 -gencode arch=compute_37,code=sm_37 -gencode arch=compute_50,code=sm_50 -gencode arch=compute_52,code=sm_52 -gencode arch=compute_52,code=compute_52 -o asyncAPI asyncAPI.o
mkdir -p ../../bin/x86_64/darwin/release
cp asyncAPI ../../bin/x86_64/darwin/release

Yes! Success!
...However, unknown actually what nvcc are using the clang of CXX.

Solution

So, Let's edit clang binary.

> cp /Applications/Xcode-beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang /tmp/clang

> cd /tmp

> vim ./clang
# or nvim, emacs, etc...

Searching 700.1.75 and replace 602.0.53.
In case of vim,

:%s/700.1.75/602.0.53/g
:wq

And,

> export PATH=/tmp:/usr/local/bin:/usr/bin:/usr/sbin:/usr/local/var/rbenv/shims:/sbin

> wihch clang
/tmp/clang

> clang -v
# Faking clang version 602.0.53 (Xcode 6.4's clang)
# but, Actual implementation clang 7.0.0
Apple LLVM version 7.0.0 (clang-602.0.53)
Target: x86_64-apple-darwin15.0.0
Thread model: posix

> make
/Developer/NVIDIA/CUDA-7.5/bin/nvcc -ccbin clang++ -I../../common/inc  -m64  -Xcompiler -arch -Xcompiler x86_64  -gencode arch=compute_20,code=sm_20 -gencode arch=compute_30,code=sm_30 -gencode arch=compute_35,code=sm_35 -gencode arch=compute_37,code=sm_37 -gencode arch=compute_50,code=sm_50 -gencode arch=compute_52,code=sm_52 -gencode arch=compute_52,code=compute_52 -o asyncAPI.o -c asyncAPI.cu
/Developer/NVIDIA/CUDA-7.5/bin/nvcc -ccbin clang++   -m64  -Xcompiler -arch -Xcompiler x86_64  -Xlinker -rpath -Xlinker /Developer/NVIDIA/CUDA-7.5/lib  -gencode arch=compute_20,code=sm_20 -gencode arch=compute_30,code=sm_30 -gencode arch=compute_35,code=sm_35 -gencode arch=compute_37,code=sm_37 -gencode arch=compute_50,code=sm_50 -gencode arch=compute_52,code=sm_52 -gencode arch=compute_52,code=compute_52 -o asyncAPI asyncAPI.o
mkdir -p ../../bin/x86_64/darwin/release
cp asyncAPI ../../bin/x86_64/darwin/release

Yeeeeees!
nvcc compiled using clang version 7.0.0.

In this way, sudo xcode-select -s /Applications/Xcode-6.4.app/Contents/Developer is not required.
but, Your clang is remains became /tmp/clang. Be careful.
🎉