This build of Minefield for OS/2 was made from code in mozilla-central dated
2009-07-07 11:07:07 PDT (changeset a60b78ae0793).
But the build could only be completed (with GCC 4.0.0-20090426) by adding an
extra patch.

See all patches against mozilla-central below.

================================================================================
diff --git a/content/canvas/src/nsCanvasRenderingContext2D.cpp b/content/canvas/src/nsCanvasRenderingContext2D.cpp
--- a/content/canvas/src/nsCanvasRenderingContext2D.cpp
+++ b/content/canvas/src/nsCanvasRenderingContext2D.cpp
@@ -3624,19 +3624,19 @@
                     !JS_GetElement(ctx, dataArray, pixelOffset + 3, &va))
                     return NS_ERROR_DOM_SYNTAX_ERR;
 
-                if (JSVAL_IS_INT(vr))         ir = ToUint8(JSVAL_TO_INT(vr));
+                if (JSVAL_IS_INT(vr))         ir = ToUint8((PRInt32)JSVAL_TO_INT(vr));
                 else if (JSVAL_IS_DOUBLE(vr)) ir = ToUint8(*JSVAL_TO_DOUBLE(vr));
                 else return NS_ERROR_DOM_SYNTAX_ERR;
 
-                if (JSVAL_IS_INT(vg))         ig = ToUint8(JSVAL_TO_INT(vg));
+                if (JSVAL_IS_INT(vg))         ig = ToUint8((PRInt32)JSVAL_TO_INT(vg));
                 else if (JSVAL_IS_DOUBLE(vg)) ig = ToUint8(*JSVAL_TO_DOUBLE(vg));
                 else return NS_ERROR_DOM_SYNTAX_ERR;
 
-                if (JSVAL_IS_INT(vb))         ib = ToUint8(JSVAL_TO_INT(vb));
+                if (JSVAL_IS_INT(vb))         ib = ToUint8((PRInt32)JSVAL_TO_INT(vb));
                 else if (JSVAL_IS_DOUBLE(vb)) ib = ToUint8(*JSVAL_TO_DOUBLE(vb));
                 else return NS_ERROR_DOM_SYNTAX_ERR;
 
-                if (JSVAL_IS_INT(va))         ia = ToUint8(JSVAL_TO_INT(va));
+                if (JSVAL_IS_INT(va))         ia = ToUint8((PRInt32)JSVAL_TO_INT(va));
                 else if (JSVAL_IS_DOUBLE(va)) ia = ToUint8(*JSVAL_TO_DOUBLE(va));
                 else return NS_ERROR_DOM_SYNTAX_ERR;