Add tests for SRC in makefile

tests/build_system/src_folders/Makefile

@@ -0,0 +1,18 @@
+include ../Makefile.build_system_common
+
+# Add subfolders as modules
+DIRS += module_testing
+USEMODULE += my_module
+
+# Add fmt to read blob
+USEMODULE += fmt
+
+# Add blobs 
+BLOBS += blob/blob_subdir/blobtest_subdir.txt
+
+SRC += main.c
+SRC += folder/a.c blob/blob_test.c folder/subfolder/b.c
+# # Alternative method to add files in subfolders using wildcards
+# # SRC += $(wildcard *.c blob/*.c folder/*.c folder/**/*.c)
+
+include $(RIOTBASE)/Makefile.include

tests/build_system/src_folders/blob/blob_subdir/blobtest_subdir.txt

@@ -0,0 +1 @@
+Hello blob_subdir!

tests/build_system/src_folders/blob/blob_test.c

@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2024 Orange
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+#include "fmt.h"
+
+#include "blob/blob/blob_subdir/blobtest_subdir.txt.h"
+
+void blob_print(void) 
+{
+    print((char *)blobtest_subdir_txt, blobtest_subdir_txt_len);
+    print("\n", 1);
+}

tests/build_system/src_folders/folder/a.c

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2023 TU Dresden
+ * Copyright (C) 2024 Orange
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+#include <stdio.h>
+
+void folder_a(void)
+{
+    puts("./folder/a.c");
+}

tests/build_system/src_folders/folder/subfolder/b.c

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2023 TU Dresden
+ * Copyright (C) 2024 Orange
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+#include <stdio.h>
+
+void folder_b(void)
+{
+    puts("./folder/subfolder/b.c");
+}

tests/build_system/src_folders/main.c

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2024 Orange
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+
+/**
+ * @ingroup     tests
+ * @{
+ *
+ * @file
+ * @brief       Test proving SRC subfolders compatibility with RIOT.
+ *              
+ * @author      Pierre Le Meur <pierre1.lemeur@orange.com>
+ *
+ *
+ * @}
+ */
+
+#include <stdio.h>
+
+void module_a(void);
+void module_b(void);
+void folder_a(void);
+void folder_b(void);
+void blob_print(void);
+
+int main(void)
+{
+    puts("./main.c");
+
+    /* call functions from RIOT module */
+    module_a();
+    module_b();
+    /* call functions from subfolder */
+    folder_a();
+    folder_b();
+
+    /* blob test */
+    blob_print();
+
+    return 0;
+}

tests/build_system/src_folders/module_testing/Makefile

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+MODULE := my_module
+
+include $(RIOTBASE)/Makefile.base

tests/build_system/src_folders/module_testing/a.c

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2023 TU Dresden
+ * Copyright (C) 2024 Orange
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+
+#include <stdio.h>
+
+void module_a(void)
+{
+    puts("./module_testing/a.c");
+}

tests/build_system/src_folders/module_testing/b.c

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2023 TU Dresden
+ * Copyright (C) 2024 Orange
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+#include <stdio.h>
+
+void module_b(void)
+{
+    puts("./module_testing/b.c");
+}