work around mktemp warning

diff --git a/src/build_log_test.cc b/src/build_log_test.cc
index 11c0e09..ca268d2 100644 (file)
--- a/src/build_log_test.cc
+++ b/src/build_log_test.cc
@@ -4,8 +4,7 @@
 
 struct BuildLogTest : public StateTestWithBuiltinRules {
   virtual void SetUp() {
-    char mktemp_template[] = "BuildLogTest-XXXXXX";
-    log_filename_ = mktemp(mktemp_template);
+    log_filename_ = tempnam(NULL, "ninja");
   }
   virtual void TearDown() {
     unlink(log_filename_.c_str());