From bbd66503d81b6ee8509d0c0604128d7a3acca81a Mon Sep 17 00:00:00 2001
From: Loek Le Blansch <loek@pipeframe.xyz>
Date: Wed, 4 Sep 2024 13:09:34 +0200
Subject: add dynamic linking test (tested on linux)

---
 mwe/dynlink/exec/CMakeLists.txt | 23 +++++++++++++++++++++++
 mwe/dynlink/exec/main.c         |  8 ++++++++
 mwe/dynlink/exec/makefile       |  1 +
 mwe/dynlink/lib/CMakeLists.txt  | 10 ++++++++++
 mwe/dynlink/lib/lib.c           |  6 ++++++
 mwe/dynlink/lib/lib.h           |  4 ++++
 mwe/dynlink/lib/makefile        |  1 +
 mwe/dynlink/readme.md           |  1 +
 8 files changed, 54 insertions(+)
 create mode 100644 mwe/dynlink/exec/CMakeLists.txt
 create mode 100644 mwe/dynlink/exec/main.c
 create mode 100644 mwe/dynlink/exec/makefile
 create mode 100644 mwe/dynlink/lib/CMakeLists.txt
 create mode 100644 mwe/dynlink/lib/lib.c
 create mode 100644 mwe/dynlink/lib/lib.h
 create mode 100644 mwe/dynlink/lib/makefile
 create mode 100644 mwe/dynlink/readme.md

diff --git a/mwe/dynlink/exec/CMakeLists.txt b/mwe/dynlink/exec/CMakeLists.txt
new file mode 100644
index 0000000..5335f0f
--- /dev/null
+++ b/mwe/dynlink/exec/CMakeLists.txt
@@ -0,0 +1,23 @@
+cmake_minimum_required(VERSION 3.28)
+
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 20)
+
+project(main C CXX)
+
+# Since we have the source code for the test library, we might as well let
+# CMake use it so it automatically picks up the interface headers and compiles
+# the library for us. The same can be achieved manually, but is more code.
+add_subdirectory(../lib test)
+
+add_executable(main main.c)
+
+# Make sure ld.so (linux) looks in the same folder as the final executable for
+# the .so dependency
+set_target_properties(main PROPERTIES BUILD_RPATH "$ORIGIN")
+
+# This links test (dynamically, as defined in ../lib/CMakeLists.txt) and makes
+# the <lib.h> interface header available (also as defined in
+# ../lib/CMakeLists.txt)
+target_link_libraries(main PRIVATE test)
+
diff --git a/mwe/dynlink/exec/main.c b/mwe/dynlink/exec/main.c
new file mode 100644
index 0000000..e3f458a
--- /dev/null
+++ b/mwe/dynlink/exec/main.c
@@ -0,0 +1,8 @@
+#include <lib.h>
+
+int main() {
+	library_function();
+
+	return 0;
+}
+
diff --git a/mwe/dynlink/exec/makefile b/mwe/dynlink/exec/makefile
new file mode 100644
index 0000000..eec7c61
--- /dev/null
+++ b/mwe/dynlink/exec/makefile
@@ -0,0 +1 @@
+include ../../../lazy.mk
diff --git a/mwe/dynlink/lib/CMakeLists.txt b/mwe/dynlink/lib/CMakeLists.txt
new file mode 100644
index 0000000..2d15353
--- /dev/null
+++ b/mwe/dynlink/lib/CMakeLists.txt
@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.28)
+
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_CXX_STANDARD 20)
+
+project(lib C CXX)
+
+add_library(test SHARED lib.c)
+target_include_directories(test SYSTEM INTERFACE .)
+
diff --git a/mwe/dynlink/lib/lib.c b/mwe/dynlink/lib/lib.c
new file mode 100644
index 0000000..930e403
--- /dev/null
+++ b/mwe/dynlink/lib/lib.c
@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+void library_function() {
+	printf("%s\n", __PRETTY_FUNCTION__);
+}
+
diff --git a/mwe/dynlink/lib/lib.h b/mwe/dynlink/lib/lib.h
new file mode 100644
index 0000000..068f07d
--- /dev/null
+++ b/mwe/dynlink/lib/lib.h
@@ -0,0 +1,4 @@
+#pragma once
+
+void library_function();
+
diff --git a/mwe/dynlink/lib/makefile b/mwe/dynlink/lib/makefile
new file mode 100644
index 0000000..eec7c61
--- /dev/null
+++ b/mwe/dynlink/lib/makefile
@@ -0,0 +1 @@
+include ../../../lazy.mk
diff --git a/mwe/dynlink/readme.md b/mwe/dynlink/readme.md
new file mode 100644
index 0000000..0826951
--- /dev/null
+++ b/mwe/dynlink/readme.md
@@ -0,0 +1 @@
+# dynamic linking test
-- 
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