[common] cpuinfo: implement lgDebugCPU

This is a helper function that can be run at startup to quickly generate
a debug print containing CPU information.

common/CMakeLists.txt

@@ -33,6 +33,7 @@ set(COMMON_SOURCES
   src/runningavg.c
   src/ringbuffer.c
   src/vector.c
+  src/cpuinfo.c
 )
 
 add_library(lg_common STATIC ${COMMON_SOURCES})

common/src/cpuinfo.c

@@ -0,0 +1,38 @@
+/**
+ * Looking Glass
+ * Copyright © 2017-2021 The Looking Glass Authors
+ * https://looking-glass.io
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc., 59
+ * Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include "common/cpuinfo.h"
+#include "common/debug.h"
+
+void lgDebugCPU(void)
+{
+  char model[1024];
+  int procs;
+  int cores;
+
+  if (!lgCPUInfo(model, sizeof model, &procs, &cores))
+  {
+    DEBUG_WARN("Failed to get CPU information");
+    return;
+  }
+
+  DEBUG_INFO("CPU Model: %s", model);
+  DEBUG_INFO("CPU: %d cores, %d threads", cores, procs);
+}