From 6e2444ff97616f68a2bcfd97b4cd2acec880b93b Mon Sep 17 00:00:00 2001
From: Michael Carroll <michael@openrobotics.org>
Date: Mon, 28 Aug 2023 09:04:28 -0500
Subject: [PATCH] Build examples from CMake rather than executable (#502)
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Signed-off-by: Michael Carroll <michael@openrobotics.org>
Signed-off-by: Michael Carroll <michael@openrobotics.org>
Signed-off-by: Michael Carroll <mjcarroll@intrinsic.ai>
Co-authored-by: Alejandro Hernández Cordero <ahcorde@gmail.com>
Co-authored-by: Ian Chen <ichen@openrobotics.org>
---
 .github/workflows/macos.yml | 10 ++++++----
 CMakeLists.txt              | 11 ++++++++++-
 examples/CMakeLists.txt     |  4 +++-
 3 files changed, 19 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 54e002fd..de4fd5d0 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -48,12 +48,14 @@ jobs:
       run: cmake .. -DCMAKE_INSTALL_PREFIX=/usr/local/Cellar/${PACKAGE}/HEAD
     - run: make
       working-directory: build
-    - run: make test
-      working-directory: build
-      env:
-        CTEST_OUTPUT_ON_FAILURE: 1
+    # Run make install before make test so that the package will be available to
+    # build examples as part of the test
     - name: make install
       working-directory: build
       run: |
         make install;
         brew link ${PACKAGE};
+    - run: make test
+      working-directory: build
+      env:
+        CTEST_OUTPUT_ON_FAILURE: 1
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b13ff3b9..ad621374 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -144,7 +144,6 @@ gz_configure_build(QUIT_IF_BUILD_ERRORS
 #============================================================================
 gz_create_packages()
 
-
 #============================================================================
 # Create documentation
 #============================================================================
@@ -157,3 +156,13 @@ gz_create_docs(
   TAGFILES
     "${GZ-MATH_DOXYGEN_TAGFILE} = ${GZ-MATH_API_URL}"
   )
+
+#============================================================================
+# Build examples
+#============================================================================
+if (BUILD_TESTING)
+  gz_build_examples(
+    SOURCE_DIR ${PROJECT_SOURCE_DIR}/examples
+    BINARY_DIR ${PROJECT_BINARY_DIR}/examples
+  )
+endif()
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 22f20252..3908f387 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,4 +1,6 @@
-cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
+
+project(gz-common-examples)
 
 # Find the gz-common library
 find_package(gz-common5 QUIET REQUIRED COMPONENTS events profiler)