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-rw-r--r--src/libmain/shared.cc2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libmain/shared.cc b/src/libmain/shared.cc
index 4725d1ed1047..dee9a5320cc8 100644
--- a/src/libmain/shared.cc
+++ b/src/libmain/shared.cc
@@ -220,6 +220,8 @@ static void initAndRun(int argc, char * * argv)
             ; /* !!! obsolete - remove eventually */
         else if (arg == "--no-build-output" || arg == "-Q")
             buildVerbosity = lvlVomit;
+        else if (arg == "--print-build-trace")
+            printBuildTrace = true;
         else if (arg == "--help") {
             printHelp();
             return;