Fixed g++ with Vortex, _start stil not initializing propoerly

runtime/mains/vecadd/Makefile

@@ -1,5 +1,5 @@
 
-COMP     = ~/dev/riscv-gnu-toolchain/drops/bin/riscv32-unknown-elf-gcc
+COMP     = ~/dev/riscv-gnu-toolchain/drops/bin/riscv32-unknown-elf-g++
 # CC_FLAGS = -march=rv32im -mabi=ilp32 -O0 -Wl,-Bstatic,-T,linker.ld -ffreestanding -nostdlib
 CC_FLAGS = -march=rv32im -mabi=ilp32 -O0 -Wl,-Bstatic,-T,linker.ld -ffreestanding -nostartfiles -nostdlib
 
@@ -7,7 +7,7 @@ DMP  = ~/dev/riscv-gnu-toolchain/drops/bin/riscv32-unknown-elf-objdump
 CPY  = ~/dev/riscv-gnu-toolchain/drops/bin/riscv32-unknown-elf-objcopy
 
 
-NEWLIB  = ../../newlib/newlib.c ../../newlib/newlib_notimp.c ../../newlib/newlib.s
+NEWLIB  = ../../newlib/newlib.c
 VX_STR  = ../../startup/vx_start.s
 VX_INT  = ../../intrinsics/vx_intrinsics.s
 VX_IO   = ../../io/vx_io.s ../../io/vx_io.c

runtime/mains/vecadd/vx_pocl_main.c

@@ -54,6 +54,10 @@ typedef struct {
 static int g_num_kernels = 0;
 static kernel_info_t g_kernels [MAX_KERNELS];
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 int _pocl_register_kernel(const char* name, const void* pfn, uint32_t num_args, uint32_t num_locals, const uint8_t* arg_types, const uint32_t* local_sizes) {
   printf("******** _pocl_register_kernel\n");
   printf("Name to register: %s\n", name);
@@ -100,6 +104,10 @@ int _pocl_query_kernel(const char* name, const void** p_pfn, uint32_t* p_num_arg
   return -1;
 }
 
+#ifdef __cplusplus
+}
+#endif
+
 int exitcode = 0;
 cl_context context = NULL;
 cl_command_queue commandQueue = NULL;