From c8101b46f7738a37657bceeaf3137527d21ae556 Mon Sep 17 00:00:00 2001
From: Pavel Krajcevski <pavel@cs.unc.edu>
Date: Mon, 14 Oct 2013 20:58:11 -0400
Subject: [PATCH] Make sure not to break compilation if we don't have any
 atomics.

---
 Core/src/TexComp.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/Core/src/TexComp.cpp b/Core/src/TexComp.cpp
index f69a22a..5b36d50 100644
--- a/Core/src/TexComp.cpp
+++ b/Core/src/TexComp.cpp
@@ -186,6 +186,7 @@ static double CompressImageInSerial(
   return cmpTime;
 }
 
+#ifdef HAS_ATOMICS
 class AtomicThreadUnit : public TCCallable {
   CompressionJobList &m_CompressionJobList;
   TCBarrier *m_Barrier;
@@ -269,6 +270,16 @@ static double CompressImageWithAtomics(
   double cmpTimeTotal = sw.TimeInMilliseconds();
   return cmpTimeTotal / double(settings.iNumCompressions);
 }
+#else  // HAS_ATOMICS
+static double CompressImageWithAtomics(
+  const unsigned char *imgData,
+  const unsigned int width, const unsigned int height,
+  const SCompressionSettings &settings,
+  unsigned char *outBuf
+) {
+  fprintf(stderr, "Compiler does not support atomic operations!");
+}
+#endif
 
 static double CompressThreadGroup(ThreadGroup &tgrp, const SCompressionSettings &settings) {
   if(!(tgrp.PrepareThreads())) {
@@ -419,6 +430,13 @@ bool CompressImageData(
   }
   #endif
 
+  #ifndef HAS_ATOMICS
+  if(settings.bUseAtomics) {
+    ReportError("Compiler's atomic operations are not supported!\n");
+    return false;
+  }
+  #endif
+
   if(dataSz <= 0) {
     ReportError("No data sent to compress!");
     return false;