[lldb][tests] Posix function strdup requires macro _POSIX_C_SOURCE

diff --git a/lldb/packages/Python/lldbsuite/test/functionalities/exec/main.cpp b/lldb/packages/Python/lldbsuite/test/functionalities/exec/main.cpp
index 4475bbe..bec470f 100644 (file)
--- a/lldb/packages/Python/lldbsuite/test/functionalities/exec/main.cpp
+++ b/lldb/packages/Python/lldbsuite/test/functionalities/exec/main.cpp
@@ -1,3 +1,5 @@
+#define _POSIX_C_SOURCE 200809L
+
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>