doc: specify parallelization in make in tutorial

Thanks to nitronarcosis for reporting the issue and suggesting a fix.

diff --git a/doc/user/tutorial.txt b/doc/user/tutorial.txt
index 2a13e039078a430fb80482c9e620e4ce807debd0..1f31870be811e1c79adc5c6bbd46635827519dd6 100644 (file)
--- a/doc/user/tutorial.txt
+++ b/doc/user/tutorial.txt
@@ -89,7 +89,7 @@ a. To build with cmake and make, run configure_cmake.sh.  It will
 
     ./configure_cmake.sh --prefix=$my_path
     cd build
-    make -j
+    make -j $(nproc)
     make install
     ln -s $my_path/conf $my_path/etc