HARDENING: disabled flags: pie
HARDENING: Is active (not completely disabled with "all" flag)
HARDENING: enabling fortify
HARDENING: enabling stackprotector
HARDENING: enabling strictoverflow
HARDENING: enabling format
HARDENING: enabling pic
extra flags before to /nix/store/imfm3gk3qchmyv7684pjpm8irvkdrrkk-gcc-7.3.0/bin/gcc:
  -O2
  -D_FORTIFY_SOURCE=2
  -fstack-protector-strong
  --param
  ssp-buffer-size=4
  -fno-strict-overflow
  -Wformat
  -Wformat-security
  -Werror=format-security
  -fPIC
  -Wl\,-dynamic-linker
  -Wl\,/nix/store/83lrbvbmxrgv7iz49mgd42yvhi473xp6-glibc-2.27/lib/ld-linux-x86-64.so.2
original flags to /nix/store/imfm3gk3qchmyv7684pjpm8irvkdrrkk-gcc-7.3.0/bin/gcc:
  test.c
  -std=c99
  -lm
  -o
  test
  -lOpenCL
extra flags after to /nix/store/imfm3gk3qchmyv7684pjpm8irvkdrrkk-gcc-7.3.0/bin/gcc:
  -B/nix/store/zikcg4s36w5k6fvlba2h4p4riw1qc7fp-gcc-7.3.0-lib/lib
  -B/nix/store/83lrbvbmxrgv7iz49mgd42yvhi473xp6-glibc-2.27/lib/
  -idirafter
  /nix/store/lyd89mv72m8a0aw1a4idfimyi0rb2b13-glibc-2.27-dev/include
  -idirafter
  /nix/store/imfm3gk3qchmyv7684pjpm8irvkdrrkk-gcc-7.3.0/lib/gcc/x86_64-unknown-linux-gnu/7.3.0/include-fixed
  -B/nix/store/yz6kinf4ia19r1c14yirl6x4ciwgzk67-gcc-wrapper-7.3.0/bin/
  -Wl\,-rpath
  -Wl\,/nix/store/5k84i9700j2gx7wyzsfw3jg54zp5i9kk-shell/lib64
  -Wl\,-rpath
  -Wl\,/nix/store/5k84i9700j2gx7wyzsfw3jg54zp5i9kk-shell/lib
  -L/nix/store/hyjwrr4bxra98b10r7mp68hh3s91jxn3-gist-4.6.2/lib
  -L/nix/store/hyjwrr4bxra98b10r7mp68hh3s91jxn3-gist-4.6.2/lib
  -L/nix/store/hyjwrr4bxra98b10r7mp68hh3s91jxn3-gist-4.6.2/lib
  -L/nix/store/83lrbvbmxrgv7iz49mgd42yvhi473xp6-glibc-2.27/lib
  -L/nix/store/zikcg4s36w5k6fvlba2h4p4riw1qc7fp-gcc-7.3.0-lib/lib
test.c:1290:12: fatal error: CL/cl.h: No such file or directory
   #include <CL/cl.h>
            ^~~~~~~~~
compilation terminated.