Implement fl_putenv() as cross-platform putenv()

1 files changed, 4 insertions, 4 deletions

diff --git a/src/Fl_System_Driver.H b/src/Fl_System_Driver.H
index c3f8dc013..67f608177 100644
--- a/src/Fl_System_Driver.H
+++ b/src/Fl_System_Driver.H
@@ -4,17 +4,17 @@
 // A base class for platform specific system calls
 // for the Fast Light Tool Kit (FLTK).
 //
-// Copyright 2010-2018 by Bill Spitzak and others.
+// Copyright 2010-2020 by Bill Spitzak and others.
 //
 // This library is free software. Distribution and use rights are outlined in
 // the file "COPYING" which should have been included with this file.  If this
 // file is missing or damaged, see the license at:
 //
-//     http://www.fltk.org/COPYING.php
+//     https://www.fltk.org/COPYING.php
 //
 // Please report all bugs and problems on the following page:
 //
-//     http://www.fltk.org/str.php
+//     https://www.fltk.org/str.php
 //
 
 /**
@@ -97,7 +97,7 @@ public:
   // implement these to support cross-platform file operations
   virtual char *utf2mbcs(const char *s) {return (char*)s;}
   virtual char *getenv(const char* v) {return NULL;}
-  virtual int putenv(char* v) {return -1;}
+  virtual int putenv(const char *var) {return -1;}
   virtual int open(const char* f, int oflags, int pmode) {return -1;}
 
   // Note: the default implementation ignores the 'binary' argument.