STARPU_DATA_ACQUIRE_CB is defined only when using a GCC compiler, as nested functions are only supported by this compiler

doc/starpu.texi

@@ -1458,7 +1458,9 @@ acquiring data @code{i} for the main application, and will execute the code
 given as third parameter when it is acquired. In other words, as soon as the
 value of @code{i} computed by the @code{which_index} codelet can be read, the
 portion of code passed as third parameter of @code{STARPU_DATA_ACQUIRE_CB} will
-be executed, and is allowed to read from @code{i} to use it e.g. as an index.
+be executed, and is allowed to read from @code{i} to use it e.g. as an
+index. Note that this macro is only avaible when compiling StarPU with
+the compiler @code{gcc}.
 
 @node Debugging
 @section Debugging

include/starpu_data.h

@@ -60,13 +60,18 @@ void starpu_data_advise_as_important(starpu_data_handle handle, unsigned is_impo
 int starpu_data_acquire(starpu_data_handle handle, starpu_access_mode mode);
 int starpu_data_acquire_cb(starpu_data_handle handle,
 			starpu_access_mode mode, void (*callback)(void *), void *arg);
-#define STARPU_DATA_ACQUIRE_CB(handle, mode, code) do { \
+#ifdef __GCC__
+#  define STARPU_DATA_ACQUIRE_CB(handle, mode, code) do { \
 	void callback(void *arg) { \
 		code; \
 		starpu_data_release(handle); \
 	} \
 	starpu_data_acquire_cb(handle, mode, callback, NULL); \
 } while(0)
+#else
+#  define STARPU_DATA_ACQUIRE_CB(handle, mode, node) assert(0)
+#endif
+
 void starpu_data_release(starpu_data_handle handle);
 
 int starpu_malloc(void **A, size_t dim);

tests/datawizard/acquire_cb_insert.c

@@ -52,12 +52,17 @@ starpu_codelet work = {
 };
 
 static int x;
+static starpu_data_handle x_handle, f_handle;
+
+void callback(void *arg) {
+	starpu_insert_task(&work, STARPU_W, starpu_data_get_sub_data(f_handle, 1, x), 0);
+	starpu_data_release(x_handle);
+}
 
 int main(int argc, char **argv)
 {
         int i, ret;
 	float *f;
-	starpu_data_handle x_handle, f_handle;
 
 	starpu_init(NULL);
 
@@ -81,11 +86,15 @@ int main(int argc, char **argv)
 	if (ret == -ENODEV) goto enodev;
 
 	/* And submit the corresponding task */
+#ifdef __GCC__
 	STARPU_DATA_ACQUIRE_CB(
 			x_handle,
 			STARPU_R,
 			starpu_insert_task(&work, STARPU_W, starpu_data_get_sub_data(f_handle, 1, x), 0)
 			);
+#else
+	starpu_data_acquire_cb(x_handle, STARPU_W, callback, NULL);
+#endif
 
 	starpu_task_wait_for_all();
 	starpu_data_unpartition(f_handle, 0);