ci: Create build.yml

Add a simple build testing using Github Actions.

Signed-off-by: Andrii Nakryiko <[email protected]>

Author: anakryiko

.github/workflows/build.yml

@@ -0,0 +1,21 @@
+name: veristat build
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        submodules: true
+    - name: Install dependencies
+      run: sudo apt-get install -y elfutils libelf-dev
+    - name: make
+      run: make -C src -j$(nproc)

README.md

@@ -1,4 +1,6 @@
-# veristat
+veristat
+[![Build](https://github.com/libbpf/veristat/actions/workflows/build.yml/badge.svg)](https://github.com/libbpf/veristat/actions/workflows/build.yml)
+========
 
 > This is a mirror of veristat sources from
 > [bpf-next](https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next)

src/Makefile

@@ -3,7 +3,7 @@ VERISTAT_VERSION ?= 0.1
 DEBUG ?=
 
 OUTPUT := .output
-LIBBPF_SRC := $(abspath ../../libbpf/src)
+LIBBPF_SRC := $(abspath ../libbpf/src)
 LIBBPF_OBJ := $(abspath $(OUTPUT)/libbpf.a)
 # Use our own libbpf API headers and Linux UAPI headers distributed with
 # libbpf to avoid dependency on system-wide headers, which could be missing or
@@ -68,7 +68,7 @@ $(LIBBPF_OBJ): $(wildcard $(LIBBPF_SRC)/*.[ch] $(LIBBPF_SRC)/Makefile) | $(OUTPU
 		    install
 
 # Build .c files
-$(OUTPUT)/%.o: %.c $(wildcard %.h) | $(OUTPUT)
+$(OUTPUT)/%.o: %.c $(wildcard %.h) $(LIBBPF_OBJ) | $(OUTPUT)
 	$(call msg,CC,$@)
 	$(Q)$(CC) $(ALL_CFLAGS) $(INCLUDES) -c $(filter %.c,$^) -o $@