Applied patch from Bo, WIP

[wxWidgets.git] / src / unix / utilsunx.cpp

diff --git a/src/unix/utilsunx.cpp b/src/unix/utilsunx.cpp
index 784cf1031f42856bfe3c49b7e61bd7b582cb2e8c..429cf3e2f3c13824af43b45c0d6427747a7dd659 100644 (file)
--- a/src/unix/utilsunx.cpp
+++ b/src/unix/utilsunx.cpp
@@ -1098,6 +1098,18 @@ bool wxGetEnv(const wxString& var, wxString *value)
 static bool wxDoSetEnv(const wxString& variable, const char *value)
 {
 #if defined(HAVE_SETENV)
+    if ( !value )
+    {
+#ifdef HAVE_UNSETENV
+        // don't test unsetenv() return value: it's void on some systems (at
+        // least Darwin)
+        unsetenv(variable.mb_str());
+        return true;
+#else
+        value = ""; // we can't pass NULL to setenv()
+#endif
+    }
+
     return setenv(variable.mb_str(), value, 1 /* overwrite */) == 0;
 #elif defined(HAVE_PUTENV)
     wxString s = variable;