1 files changed, 13 insertions, 0 deletions
diff --git a/libbutl/utility.ixx b/libbutl/utility.ixx
index d4aaa65..565a694 100644
--- a/libbutl/utility.ixx
+++ b/libbutl/utility.ixx
@@ -2,6 +2,10 @@
 // copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
 // license   : MIT; see accompanying LICENSE file
 
+#ifndef __cpp_lib_modules
+#include <cstdlib> // getenv()
+#endif
+
 namespace butl
 {
   inline char
@@ -199,4 +203,13 @@ namespace butl
 
     throw std::istream::failure ("");
   }
+
+  inline optional<std::string>
+  getenv (const std::string& name)
+  {
+    if (const char* r = std::getenv (name.c_str ()))
+      return std::string (r);
+
+    return nullopt;
+  }
 }