Index: lttoolbox/lt_trim.cc
--- lttoolbox/lt_trim.cc.orig
+++ lttoolbox/lt_trim.cc
@@ -24,6 +24,7 @@
 #include <iostream>
 #include <libgen.h>
 #include <string>
+#include <unistd.h>
 
 void endProgram(char *name)
 {
@@ -160,6 +161,11 @@ trim(FILE *file_mono, FILE *file_bi)
 
 int main(int argc, char *argv[])
 {
+  if (pledge("stdio rpath wpath cpath", NULL) == -1) {
+    wcerr << "pledge" << endl;
+    exit(EXIT_FAILURE);
+  }
+
   if(argc != 4)
   {
     endProgram(argv[0]);