makeparallel: unset MAKEFLAGS and MAKELEVEL

makeparallel inherits values for MAKEFLAGS and MAKELEVEL from make
through the environment, but they should not be propagated to the child
process in case the child process tries to run make again.

Change-Id: I4c5df10ea8055cd1f1f61a892d5b1a7acb287bbb

1 files changed, 2 insertions, 0 deletions

diff --git a/tools/makeparallel/makeparallel.cpp b/tools/makeparallel/makeparallel.cpp
index cf125faa3a..3c39846ecd 100644
--- a/tools/makeparallel/makeparallel.cpp
+++ b/tools/makeparallel/makeparallel.cpp
@@ -341,6 +341,8 @@ int main(int argc, char* argv[]) {
     error(errno, errno, "fork failed");
   } else if (pid == 0) {
     // child
+    unsetenv("MAKEFLAGS");
+    unsetenv("MAKELEVEL");
     int ret = execvp(path, args.data());
     if (ret < 0) {
       error(errno, errno, "exec %s failed", path);