Makefile: use $(shell pwd) instead of $PWD (#13)

Author: abbbi

.github/workflows/ci-ubuntu-latest.yml

@@ -8,6 +8,8 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - uses: abbbi/github-actions-tune@v1
+    - name: apt update
+      run: sudo apt-get update
     - name: Install build-essential and devscripts
       run: sudo apt-get install build-essential devscripts equivs acl
     - name: Install Kernel Build Dependencies

Makefile

@@ -2,7 +2,7 @@ obj-m := nullfs.o
 
 all: ko
 ko:
-	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
+	make -C /lib/modules/$(shell uname -r)/build M=$(shell pwd) modules
 
 clean:
-	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean
+	make -C /lib/modules/$(shell uname -r)/build M=$(shell pwd) clean