ldgm gpu: Move cuda_check_error macro

nvcc had some problems with gcc 12.1 stl map templates when compiling gpu.cu.
And since ldgm-session-gpu.h which contained the c++ code was only needed for
this one macro, it's probably better to move it to gpu.cuh which is
already included by all files that need it.

ldgm/src/gpu.cu

@@ -23,7 +23,6 @@
 #include <cuda_runtime.h>
 //#include "timer-util.h"
 #include "gpu.cuh"
-#include "ldgm-session-gpu.h"
 
 struct coding_params {
         int num_lost;

ldgm/src/gpu.cuh

@@ -1,3 +1,16 @@
+#include <stdio.h>
+
+// CUDA check error
+#define cuda_check_error(msg) \
+    { \
+        cudaError_t err = cudaGetLastError(); \
+        if( cudaSuccess != err) { \
+            fprintf(stderr, "[LDGM GPU] [Error] %s (line %i): %s: %s.\n", \
+                __FILE__, __LINE__, msg, cudaGetErrorString( err) ); \
+            exit(-1); \
+        } \
+    } \
+
 #ifdef __cplusplus
 extern "C" {
 #endif

ldgm/src/ldgm-session-gpu.h

@@ -21,23 +21,11 @@
 #define  LDGM_SESSION_GPU_INC
 
 #include <string.h>
-#include <stdio.h>
 #include "ldgm-session.h"
 
 #include <map>
 #include <queue>
 
-// CUDA check error
-#define cuda_check_error(msg) \
-    { \
-        cudaError_t err = cudaGetLastError(); \
-        if( cudaSuccess != err) { \
-            fprintf(stderr, "[LDGM GPU] [Error] %s (line %i): %s: %s.\n", \
-                __FILE__, __LINE__, msg, cudaGetErrorString( err) ); \
-            exit(-1); \
-        } \
-    } \
-
 /*
  * =====================================================================================
  *        Class:  LDGM_session_gpu