Don't unset MAKEFLAGS in non-GNU Makefile.

It's useful to be able to pass down options like -s and -j.

Back-patch to 9.5, like commit a76200de.

Discussion: https://postgr.es/m/CA%2BhUKG%2Be1M8-BbL%3DPqhTp6oO6XPO6%2Bs9WGQMLfbuZ%3DG9CtzyXg%40mail.gmail.com

diff --git a/Makefile b/Makefile
index c400854cd3d0274d07709ffe1cb01ae035b7e480..99dcfff654dc2c3e22e801913453dbb1be93db92 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -33,7 +33,7 @@ all check install installdirs installcheck installcheck-parallel uninstall clean
    \
     if [ x"$${GMAKE+set}" = xset ]; then \
       echo "Using GNU make found at $${GMAKE}"; \
-      unset MAKEFLAGS; unset MAKELEVEL; \
+      unset MAKELEVEL; \
       $${GMAKE} $@ ; \
     else \
       echo "You must use GNU make to build PostgreSQL." ; \