Fix infinite loop in abc command under emscripten

diff --git a/passes/techmap/abc.cc b/passes/techmap/abc.cc
index 8e148430188b510eb3e0cffc1d90a9e125fd540e..18868c6d77208b84fd3c22f7069c1ce0c7385514 100644 (file)
--- a/passes/techmap/abc.cc
+++ b/passes/techmap/abc.cc
@@ -550,11 +550,13 @@ std::string replace_tempdir(std::string text, std::string tempdir_name, bool sho
        }
 
        std::string  selfdir_name = proc_self_dirname();
-       while (1) {
-               size_t pos = text.find(selfdir_name);
-               if (pos == std::string::npos)
-                       break;
-               text = text.substr(0, pos) + "<yosys-exe-dir>/" + text.substr(pos + GetSize(selfdir_name));
+       if (selfdir_name != "/") {
+               while (1) {
+                       size_t pos = text.find(selfdir_name);
+                       if (pos == std::string::npos)
+                               break;
+                       text = text.substr(0, pos) + "<yosys-exe-dir>/" + text.substr(pos + GetSize(selfdir_name));
+               }
        }
 
        return text;