From b0b5bde01809fa861c23debd08f4926a895218fe Mon Sep 17 00:00:00 2001
From: Douglas Gregor <dgregor@apple.com>
Date: Thu, 21 Mar 2013 21:46:10 +0000
Subject: <rdar://problem/13477190> On Darwin, use DARWIN_USER_TEMP_DIR or
 DARWIN_USER_CACHE_DIR for the system temporary directory.

The DARWIN_USER_TEMP_DIR and DARWIN_USER_CACHE_DIR configuration
settings are more idiomatic for Darwin than the TMPDIR environment
variable.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177669 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/PathV2.cpp | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'lib/Support/PathV2.cpp')

diff --git a/lib/Support/PathV2.cpp b/lib/Support/PathV2.cpp
index 41add96194..58a6ea720e 100644
--- a/lib/Support/PathV2.cpp
+++ b/lib/Support/PathV2.cpp
@@ -18,6 +18,9 @@
 #include <cctype>
 #include <cstdio>
 #include <cstring>
+#ifdef __APPLE__
+#include <unistd.h>
+#endif
 
 namespace {
   using llvm::StringRef;
@@ -493,6 +496,27 @@ bool is_separator(char value) {
 void system_temp_directory(bool erasedOnReboot, SmallVectorImpl<char> &result) {
   result.clear();
 
+#ifdef __APPLE__
+  // On Darwin, use DARWIN_USER_TEMP_DIR or DARWIN_USER_CACHE_DIR.
+  int ConfName = erasedOnReboot? _CS_DARWIN_USER_TEMP_DIR
+                               : _CS_DARWIN_USER_CACHE_DIR;
+  size_t ConfLen = confstr(ConfName, 0, 0);
+  if (ConfLen > 0) {
+    do {
+      result.resize(ConfLen);
+      ConfLen = confstr(ConfName, result.data(), result.size());
+    } while (ConfLen > 0 && ConfLen != result.size());
+
+    if (ConfLen > 0) {
+      assert(result.back() == 0);
+      result.pop_back();
+      return;
+    }
+
+    result.clear();
+  }
+#endif
+
   // Check whether the temporary directory is specified by an environment
   // variable.
   const char *EnvironmentVariable;
-- 
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