add CI step to test executables

.github/workflows/release.yml

@@ -10,11 +10,11 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - run: make -f utils.mk build32
 
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         path: mtxrpicam_32
         name: mtxrpicam_32
@@ -23,11 +23,11 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
 
     - run: make -f utils.mk build64
 
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         path: mtxrpicam_64
         name: mtxrpicam_64
@@ -39,12 +39,12 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: mtxrpicam_32
         path: binaries/
 
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v4
       with:
         name: mtxrpicam_64
         path: binaries/

.github/workflows/test.yml

@@ -0,0 +1,66 @@
+name: test
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build_32:
+    runs-on: ubuntu-22.04
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - run: make -f utils.mk build32
+
+    - uses: actions/upload-artifact@v4
+      with:
+        path: mtxrpicam_32
+        name: mtxrpicam_32
+
+  build_64:
+    runs-on: ubuntu-22.04
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - run: make -f utils.mk build64
+
+    - uses: actions/upload-artifact@v4
+      with:
+        path: mtxrpicam_64
+        name: mtxrpicam_64
+
+  test_32:
+    needs: build_32
+    runs-on: ubuntu-22.04
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: actions/download-artifact@v4
+      with:
+        name: mtxrpicam_32
+        path: .
+
+    - run: chmod +x mtxrpicam_32
+
+    - run: make -f utils.mk test32
+
+  test_64:
+    needs: build_64
+    runs-on: ubuntu-22.04
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: actions/download-artifact@v4
+      with:
+        name: mtxrpicam_64
+        path: .
+
+    - run: chmod +x mtxrpicam_64
+
+    - run: make -f utils.mk test64

README.md

@@ -10,7 +10,7 @@ This is embedded into all MediaMTX releases and shouldn't normally be downloaded
 
 1. You must be on a Raspberry Pi, running Raspberry Pi OS Bullseye
 
-2. Install the build dependencies:
+2. Install build dependencies:
 
    ```sh
    sudo apt install -y \

main.c

@@ -35,6 +35,13 @@ static void on_encoder_output(uint64_t ts, const uint8_t *buf, uint64_t size) {
 }
 
 int main() {
+    // this is meant to test that dependencies have been loaded correctly
+    // therefore a simple "return 0" is enough.
+    if (strlen(getenv("TEST")) != 0) {
+        printf("test passed\n");
+        return 0;
+    }
+
     int pipe_conf_fd = atoi(getenv("PIPE_CONF_FD"));
     pipe_video_fd = atoi(getenv("PIPE_VIDEO_FD"));
 

utils.mk

@@ -10,6 +10,8 @@ help:
 	@echo "  build            build binaries for all platforms"
 	@echo "  build32          build binaries for the 64-bit platform"
 	@echo "  build64          build binaries for the 32-bit platform"
+	@echo "  test32           test binaries for the 32-bit platform"
+	@echo "  test64           test binaries for the 64-bit platform"
 	@echo ""
 
 build: build32 build64
@@ -33,6 +35,10 @@ COPY --from=build /s/mtxrpicam /s/mtxrpicam
 endef
 export DOCKERFILE_BUILD32
 
+build32:
+	echo "$$DOCKERFILE_BUILD32" | docker build . -f - -t build32
+	docker run --rm -v $(PWD):/o build32 sh -c "mv /s/mtxrpicam /o/mtxrpicam_32"
+
 define DOCKERFILE_BUILD64
 FROM $(RPI64_IMAGE) AS build
 RUN ["cross-build-start"]
@@ -52,10 +58,32 @@ COPY --from=build /s/mtxrpicam /s/mtxrpicam
 endef
 export DOCKERFILE_BUILD64
 
-build32:
-	echo "$$DOCKERFILE_BUILD32" | docker build . -f - -t build32
-	docker run --rm -v $(PWD):/o build32 sh -c "mv /s/mtxrpicam /o/mtxrpicam_32"
-
 build64:
 	echo "$$DOCKERFILE_BUILD64" | docker build . -f - -t build64
 	docker run --rm -v $(PWD):/o build64 sh -c "mv /s/mtxrpicam /o/mtxrpicam_64"
+
+define DOCKERFILE_TEST32
+FROM multiarch/qemu-user-static:x86_64-arm AS qemu
+FROM $(RPI32_IMAGE) AS build
+COPY --from=qemu /usr/bin/qemu-arm-static /usr/bin/qemu-arm-static
+RUN apt update && apt install -y --no-install-recommends libcamera0 libfreetype6 && rm -rf /var/lib/apt/lists/*
+endef
+export DOCKERFILE_TEST32
+
+test32:
+	docker run --rm --privileged multiarch/qemu-user-static:register --reset --credential yes
+	echo "$$DOCKERFILE_TEST32" | docker build . -f - -t test32
+	docker run --rm --platform=linux/arm/v6 -v $(PWD):/s -w /s test32 bash -c "TEST=1 ./mtxrpicam_32"
+
+define DOCKERFILE_TEST64
+FROM multiarch/qemu-user-static:x86_64-aarch64 AS qemu
+FROM $(RPI64_IMAGE) AS build
+COPY --from=qemu /usr/bin/qemu-aarch64-static /usr/bin/qemu-aarch64-static
+RUN apt update && apt install -y --no-install-recommends libcamera0 libfreetype6 && rm -rf /var/lib/apt/lists/*
+endef
+export DOCKERFILE_TEST64
+
+test64:
+	docker run --rm --privileged multiarch/qemu-user-static:register --reset --credential yes
+	echo "$$DOCKERFILE_TEST64" | docker build . -f - -t test64
+	docker run --rm --platform=linux/arm64/v8 -v $(PWD):/s -w /s test64 bash -c "TEST=1 ./mtxrpicam_64"