Build under MAC

[albandaft]

I am trying to build this under MAc IOS but no luck:

gcc -O2 -std=gnu99 -pedantic -Wextra -Wall -Wno-deprecated-declarations -Wno-overlength-strings -I"/System/Library/Frameworks/OpenCL.framework/Versions/Current/Headers/"  -c -o main.o main.c
In file included from main.c:23:
./_kernel.h:1:25: warning: missing terminating '"' character [-Winvalid-pp-token]
const char *ocl_code = R"_mrb_(
                        ^
./_kernel.h:1:24: error: use of undeclared identifier 'R'
const char *ocl_code = R"_mrb_(
                       ^
./_kernel.h:1:25: error: expected ';' after top level declarator
const char *ocl_code = R"_mrb_(
                        ^
                        ;
input.cl:3:9: warning: unknown pragma ignored [-Wunknown-pragmas]
#pragma OPENCL EXTENSION cl_khr_global_int32_base_atomics : enable
        ^

Any idea if this can be done?

[axelsimon]

Basically a duplicate of issue #30.