Replace -j4 with -j$(nproc)

.github/workflows/build-debian-package.yml

@@ -23,7 +23,7 @@ jobs:
 
       - name: Build from sources
         run: |
-          make -C src -j4 PREFIX=/usr
+          make -C src -j$(nproc) PREFIX=/usr
 
       - name: Prepare package workspace
         run: |

Makefile

@@ -10,7 +10,7 @@ default:
 	@echo
 	@echo "If you want to build and install from source, please try:"
 	@echo "  cd src"
-	@echo "  make -j4"
+	@echo "  make -j$(shell nproc)"
 	@echo "  sudo make install"
 	@echo
 	@echo "This Makefile knows about packaging:"

alsa-scarlett-gui.spec.template

@@ -15,7 +15,7 @@ Linux kernel Focusrite USB drivers.
 %setup
 
 %build
-make -C src -j4 VERSION=%{version} PREFIX=/usr
+make -C src %{?_smp_mflags} VERSION=%{version} PREFIX=/usr
 
 %install
 %make_install -C src PREFIX=/usr

docs/INSTALL.md

@@ -124,7 +124,7 @@ To build:
 
 ```
 cd src
-make -j4
+make -j$(nproc)
 ```
 
 To run: