Checking if TARGET_OS_IPHONE is defined isn't good enough for 10.7 and earlier.

Older versions of the TargetConditionals header always defined TARGET_OS_IPHONE to something (0 or 1), so we need to test not only for the existence but also if it is 1.

This resolves PR22631.

llvm-svn: 229904

llvm/lib/Support/Unix/Program.inc

@@ -42,10 +42,18 @@
 #define  _RESTRICT_KYWD
 #endif
 #include <spawn.h>
+
 #if defined(__APPLE__)
 #include <TargetConditionals.h>
 #endif
-#if !defined(__APPLE__) || defined(TARGET_OS_IPHONE)
+
+#if defined(__APPLE__) && !(defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE)
+#define USE_NSGETENVIRON 1
+#else
+#define USE_NSGETENVIRON 0
+#endif
+
+#if !USE_NSGETENVIRON
   extern char **environ;
 #else
 #include <crt_externs.h> // _NSGetEnviron
@@ -220,7 +228,7 @@ static bool Execute(ProcessInfo &PI, StringRef Program, const char **args,
     }
 
     if (!envp)
-#if !defined(__APPLE__) || defined(TARGET_OS_IPHONE)
+#if !USE_NSGETENVIRON
       envp = const_cast<const char **>(environ);
 #else
       // environ is missing in dylibs.