gallivm: fix lp_build_sample_offset() crash when indexing a 1-D texture

[mesa.git] / src / gallium / auxiliary / gallivm / lp_bld.h

diff --git a/src/gallium/auxiliary/gallivm/lp_bld.h b/src/gallium/auxiliary/gallivm/lp_bld.h
index 70a4960f913e5c8a6eeae4a0d9d5d703253ad59c..8103bc917fc7f9d1a95f9e2b319c5c9cd2931445 100644 (file)
--- a/src/gallium/auxiliary/gallivm/lp_bld.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld.h
@@ -35,12 +35,23 @@
 #define LP_BLD_H
 
 
+/**
+ * @file
+ * LLVM IR building helpers interfaces.
+ *
+ * We use LLVM-C bindings for now. They are not documented, but follow the C++
+ * interfaces very closely, and appear to be complete enough for code
+ * genration. See
+ * http://npcontemplation.blogspot.com/2008/06/secret-of-llvm-c-bindings.html
+ * for a standalone example.
+ */
+
 #include <llvm-c/Core.h>  
 
 
-/** Set version to 0 if missing to avoid #ifdef HAVE_LLVM everywhere */
+/** Ensure HAVE_LLVM is set to avoid #ifdef HAVE_LLVM everywhere */
 #ifndef HAVE_LLVM
-#define HAVE_LLVM 0x0207
+#error "HAVE_LLVM should be set with LLVM's version number, e.g. (0x0207 for 2.7)"
 #endif