There was an idiom to test with LL_DARWIN if the compiler used is clang. This is not correct, as clang is available on all 3 platforms. The correct way to check for this is via __clang__ (https://clang.llvm.org/docs/LanguageExtensions.html#builtin-macros)

indra/llkdu/include_kdu_xxxx.h

@@ -16,7 +16,7 @@
 // #include "include_kdu_xxxx.h"
 // // kdu_xxxx #undef'ed by include_kdu_xxxx.h
 
-#if LL_DARWIN
+#if __clang__
 // don't *really* want to rebuild KDU so turn off specific warnings for this header
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wself-assign-field"

indra/llkdu/tests/llimagej2ckdu_test.cpp

@@ -29,7 +29,7 @@
 // Class to test 
 #include "llimagej2ckdu.h"
 
-#if LL_DARWIN
+#if __clang__
 // For this source, it's true that private fields in llkdumem.h are unused.
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunused-private-field"

indra/llui/llrngwriter.cpp

@@ -29,7 +29,7 @@
 #include "llrngwriter.h"
 #include "lluicolor.h"
 
-#if LL_DARWIN
+#ifdef __clang__
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wdelete-incomplete"
 #include "lluictrlfactory.h"

indra/llui/lluictrlfactory.h

@@ -174,7 +174,7 @@ public:
 				{
 					LL_WARNS() << "Widget in " << filename << " was of type " << typeid(view).name() << " instead of expected type " << typeid(T).name() << LL_ENDL;
 
-#if LL_DARWIN
+#ifdef __clang__
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wdelete-incomplete"
 					delete view;