HP-UX system headers make a mess of isinf(), so much so that gcc fixincludes

df2218380513f49d8a3d896fc45740e9 · df2218380513f49d8a3d896fc45740e9 · commit 33464ad3a2e6 · 2005-05-16T06:45:57.000Z
can't patch it up for c++ (works in C though)

llvm-svn: 22079
diff --git a/llvm/lib/Support/IsInf.cpp b/llvm/lib/Support/IsInf.cpp
@@ -29,6 +29,10 @@ static int isinf(double x) { return !finite(x) && x==x; }
 // system header /usr/include/math.h
 # include <math.h>
 static int isinf(double x) { return !finite(x) && x==x; }
+#elif defined(__hpux)
+// HP-UX is "special"
+#include <math.h>
+static int isinf(double x) { return ((x)==INFINITY)||((x)==-INFINITY); }
 #else
 # error "Don't know how to get isinf()"
 #endif
