From 2f090b68d3a5a555e0974cd71beee97930711c33 Mon Sep 17 00:00:00 2001
From: Iuri Rezende Souza <iuri.ena@gmail.com>
Date: Tue, 7 May 2019 16:18:55 -0400
Subject: [PATCH] fix: When the target has no mkdir but has unistd.h

---
 src/util.h | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/src/util.h b/src/util.h
index 164e3cf..6e4378f 100644
--- a/src/util.h
+++ b/src/util.h
@@ -43,6 +43,7 @@
 #include <stdarg.h>     // for va_*
 #include <stdlib.h>
 #include <stdio.h>
+#include <unistd.h>
 #include <iostream>
 #include <string>
 #include <errno.h>
@@ -75,6 +76,9 @@ extern GFLAGS_DLL_DECL void (*gflags_exitfunc)(int);
 #ifndef PRId32
 #  define PRId32 "d"
 #endif
+#ifndef PRIu32
+#  define PRIu32 "u"
+#endif
 #ifndef PRId64
 #  define PRId64 "lld"
 #endif
@@ -258,7 +262,7 @@ inline void MakeTmpdir(std::string* path) {
   *path = std::string(tmppath_buffer) + "gflags_unittest";
   _mkdir(path->c_str());
 }
-#else
+#elif defined(HAVE_SYS_STAT_H)
 inline void MakeTmpdir(std::string* path) {
   if (!path->empty()) {
 	int err = mkdir(path->c_str(), 0755);
@@ -266,6 +270,33 @@ inline void MakeTmpdir(std::string* path) {
   }
   mkdir("/tmp/gflags_unittest", 0755);
 }
+#elif __cplusplus >= 201703L
+inline void MakeTmpdir(std::string* path) {
+  if (!path->empty()) {
+    char *c = mkdtemp(path->data());
+    if (c != nullptr || errno == EEXIST) return;
+  }
+  mkdtemp(path->data());
+}
+#else
+inline void MakeTmpdir(std::string* path) {
+  if (!path->empty()) {
+    char *tmp = new char[path->size() + 1];
+    strcpy(tmp, path->c_str());
+    char *c = mkdtemp(tmp);
+    if (c != nullptr || errno == EEXIST) {
+      path->replace(path->begin(), path->end(), c);
+      delete [] tmp;
+      return;
+    }
+    delete [] tmp;
+  }
+  path->replace(path->begin(), path->end(), "/tmp/gflags_unittest");
+  char *tmp = new char[path->size() + 1];
+  strcpy(tmp, path->c_str());
+  mkdtemp(tmp);
+  delete [] tmp;
+}
 #endif
 
 // -- string routines --------------------------------------------------------