kernel: search in `pwd`/kernel/ for kernels.

Closes https://github.com/veox/sgminer/issues/49.

ocl.c

@@ -41,10 +41,9 @@ char *file_contents(const char *filename, int *length)
 	void *buffer;
 	FILE *f;
 
+	/* Try in the optional kernel path first, defaults to PREFIX */
 	strcpy(fullpath, opt_kernel_path);
 	strcat(fullpath, filename);
-
-	/* Try in the optional kernel path or installed prefix first */
 	f = fopen(fullpath, "rb");
 	if (!f) {
 		/* Then try from the path sgminer was called */
@@ -52,12 +51,20 @@ char *file_contents(const char *filename, int *length)
 		strcat(fullpath, filename);
 		f = fopen(fullpath, "rb");
 	}
+	if (!f) {
+		/* Then from `pwd`/kernel/ */
+		strcpy(fullpath, sgminer_path);
+		strcat(fullpath, "kernel/");
+		strcat(fullpath, filename);
+		f = fopen(fullpath, "rb");
+	}
 	/* Finally try opening it directly */
 	if (!f)
 		f = fopen(filename, "rb");
 
 	if (!f) {
-		applog(LOG_ERR, "Unable to open %s or %s for reading", filename, fullpath);
+		applog(LOG_ERR, "Unable to open %s or %s for reading",
+		       filename, fullpath);
 		return NULL;
 	}
 

sgminer.c

@@ -7695,8 +7695,11 @@ int main(int argc, char *argv[])
 #else
 	timeBeginPeriod(1);
 #endif
+	/* opt_kernel_path defaults to SGMINER_PREFIX */
 	opt_kernel_path = alloca(PATH_MAX);
 	strcpy(opt_kernel_path, SGMINER_PREFIX);
+
+	/* sgminer_path is current dir */
 	sgminer_path = alloca(PATH_MAX);
 	s = strdup(argv[0]);
 	strcpy(sgminer_path, dirname(s));