llext-edk: add dependency flag testing

Add an interface library to the test application that defines a macro
whose value is later used in the extension. This verifies the full
dependency chain for 'app' is evaluated during EDK generation.

Signed-off-by: Luca Burelli <[email protected]>

Author: pillo79

tests/misc/llext-edk/CMakeLists.txt

@@ -2,11 +2,17 @@
 
 cmake_minimum_required(VERSION 3.20.0)
 find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+
+# verify information from dependencies is available to extensions
+add_library(dependency INTERFACE)
+target_compile_definitions(dependency INTERFACE GLOBAL_OPT="set")
+
 project(llext_edk_test LANGUAGES C)
 
 target_sources(app PRIVATE src/main.c src/foo.c)
 zephyr_include_directories(include)
 zephyr_include_directories(${ZEPHYR_BASE}/boards/native/common)
+target_link_libraries(app PUBLIC dependency)
 
 if(EXTENSION_DIR)
     target_include_directories(app PRIVATE ${EXTENSION_DIR})

tests/misc/llext-edk/extension/src/main.c

@@ -9,9 +9,14 @@
 
 #include <app_api.h>
 
+#ifndef GLOBAL_OPT
+#define GLOBAL_OPT "MISSING"
+#endif
+
 int start(int bar)
 {
 	printk("foo(%d) is %d\n", bar, foo(bar));
+	printk("GLOBAL_OPT is %s\n", GLOBAL_OPT);
 	return 0;
 }
 EXPORT_SYMBOL(start);

tests/misc/llext-edk/pytest/test_edk.py

@@ -115,6 +115,7 @@ def test_edk(unlaunched_dut: DeviceAdapter):
                 assert "Calling extension from user" in lines
                 assert "foo(42) is 1764" in lines
                 assert "foo(43) is 1849" in lines
+                assert "GLOBAL_OPT is set" in lines
 
             finally:
                 unlaunched_dut.close()