fix: Fix implementation of unsetenv on Windows (#1171)

diff --git a/src/Util.cpp b/src/Util.cpp
index 2d9bb3b733afd21fcb85e11d33771c29ffb178e9..5dde0017c18ab6c50e385dd1fdd09beb01a15e25 100644 (file)
--- a/src/Util.cpp
+++ b/src/Util.cpp
@@ -1364,6 +1364,8 @@ unsetenv(const std::string& name)
 {
 #ifdef HAVE_UNSETENV
   ::unsetenv(name.c_str());
+#elif defined(_WIN32)
+  SetEnvironmentVariable(name.c_str(), NULL);
 #else
   putenv(strdup(name.c_str())); // Leak to environment.
 #endif