gcc 7.2 and nvptx nvidia gpu offloading

Question

gcc supports offloading openmp code to nvidia cards since gcc version 7.1 but I'm unable to use it. I'm on ubuntu 17.10 and I have installed nvptx-tools and gcc-offload-nvptx packages. when I try to compile openmp target code I get this error

ptxas /tmp/ccqGsx2p.o, line 383; error   : State space mismatch between instruction and address in instruction 'ld'
ptxas /tmp/ccqGsx2p.o, line 456; error   : State space mismatch between instruction and address in instruction 'ld'
ptxas /tmp/ccqGsx2p.o, line 383; error   : Unknown symbol '__stack_chk_guard'
ptxas /tmp/ccqGsx2p.o, line 383; fatal   : Label expected for forward reference of '__stack_chk_guard'
ptxas fatal   : Ptx assembly aborted due to errors
nvptx-as: ptxas returned 255 exit status
mkoffload: fatal error: x86_64-linux-gnu-accel-nvptx-none-gcc-7 returned 1 exit status
compilation terminated.
lto-wrapper: fatal error: /usr/lib/gcc/x86_64-linux-gnu/7//accel/nvptx-none/mkoffload returned 1 exit status
compilation terminated.
/usr/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status

I was unable to find any solutions for this and openmp in gcc with nvptx support has almost no documentaion

Maybe it's a bug in gcc: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81730 — Ilya Verbin, Nov 24 '17 at 14:27
What is your compilation string (e.g. `g++ -fopenmp main.cpp`)? — Richard, Jan 24 '18 at 20:41
@Richard I don't remember now (it's been a while) but it did include an `-nvptx` flag along with `-fopenmp` — Mohibeyki, Jan 30 '18 at 13:36
This same issue (`__stack_chk_guard`) occurs for me with GCC 7.2. — Richard, Jan 31 '18 at 00:06
`g++ -O3 -Wall foo.cpp -fopenmp -foffload=nvptx-none -fno-stack-protector`. — Z boson, Mar 04 '18 at 15:13

gcc 7.2 and nvptx nvidia gpu offloading

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