Added a basic testing infrastructure and found a bug through it.

action.bash

@@ -31,7 +31,8 @@ function build_dependencies {
 
     cd .build/depends/libRR/Core/
     bash build.bash release
-    cp .build/libRR-Core.a "$REPOSITORY_FOLDER/.build/"
+    cp .build/librr-core.a "$REPOSITORY_FOLDER/.build/"
+    cp .build/librr-platform.a "$REPOSITORY_FOLDER/.build/"
 
     cd "$REPOSITORY_FOLDER"
 }

build_tests.bash

@@ -0,0 +1,76 @@
+#!/usr/bin/env bash
+
+cd $(dirname "$(pwd)/$0")
+REPOSITORY_FOLDER=$(pwd)
+
+MAIN_OBJECTS_FOLDER="$REPOSITORY_FOLDER/.build/objects/"
+DEFAULT_LINKAGE_PATHS="
+$REPOSITORY_FOLDER/.build/maintree-core.a
+$REPOSITORY_FOLDER/.build/librr-core.a
+$REPOSITORY_FOLDER/.build/librr-platform.a
+"
+
+function get_include_path_configuration() {
+    TEST_PATH=$1
+
+    INCLUDE_CONFIG_PATH="$TEST_PATH/include_paths.txt"
+    INCLUDE_STATEMENTS="-I $TEST_PATH/inc-c/"
+    if [[ ! -f $INCLUDE_CONFIG_PATH ]]
+    then
+        return
+    fi
+
+    for LINE in $(cat $INCLUDE_CONFIG_PATH)
+    do
+        INCLUDE_STATEMENTS="$INCLUDE_STATEMENTS -I $REPOSITORY_FOLDER/$LINE"
+    done
+}
+
+function get_linkage_path_configuration() {
+    TEST_PATH=$1
+
+    LINKAGE_PATHS=$DEFAULT_LINKAGE_PATHS
+    if [[ -f "$TEST_PATH/linkage_paths.txt" ]]
+    then
+        for LINKAGE_ITEM in $(cat "$TEST_PATH/linkage_paths.txt")
+        do
+            LINKAGE_PATHS="$LINKAGE_PATHS $REPOSITORY_FOLDER/$LINKAGE_ITEM"
+        done
+    fi
+}
+
+function compile_single_test() {
+    TEST_PATH=$1
+    TEST_NAME=$(basename $TEST_PATH)
+
+    echo "Compiling Test: $TEST_NAME"
+
+    # TODO: As a small improvement, the tests could be able to have multiple sub-folders for sources.
+
+    get_include_path_configuration $TEST_PATH
+    get_linkage_path_configuration $TEST_PATH
+    gcc -o $TEST_PATH/$TEST_NAME.elf $TEST_PATH/*.c $LINKAGE_PATHS $INCLUDE_STATEMENTS
+}
+
+function compile_all_tests_of_module() {
+    MODULE_NAME=$1
+
+    echo "================================================================"
+    echo "COMPILING ALL TESTS OF MODULE: '$MODULE_NAME'."
+    echo " "
+
+    TEST_PATH_LIST_PATH="$REPOSITORY_FOLDER/$MODULE_NAME/build-config/tests.txt"
+    if [[ ! -f $TEST_PATH_LIST_PATH ]]
+    then
+        echo "Couldn't find list of tests for module '$MODULE_NAME'. Skipping."
+        return
+    fi
+
+    for RELATIVE_TEST_PATH in $(cat $TEST_PATH_LIST_PATH)
+    do
+        TEST_PATH=$REPOSITORY_FOLDER/$MODULE_NAME/$RELATIVE_TEST_PATH
+        compile_single_test $TEST_PATH
+    done
+}
+
+compile_all_tests_of_module core

core/tests/internal/basic-tag-registry-usage/include_paths.txt

@@ -0,0 +1,3 @@
+.build/depends/libRR/Core/core/exports/
+.build/depends/libRR/Core/platform/exports/
+core/inc-c/

core/tests/internal/basic-tag-registry-usage/main.c

@@ -0,0 +1,15 @@
+#include <tag_registry.h>
+#include <librr/types.h>
+#include <stdio.h>
+
+int main(int argc, char **argv)
+{
+    MtTagRegistry tag_registry = mt_create_tag_registry(NULL);
+    u32_t some_tag = mt_get_tag_id(&tag_registry, "some_tag");
+    if(some_tag != mt_get_tag_id(&tag_registry, "some_tag"))
+    {
+        puts("Inconsistent returned tag identifiers.");
+        return -1;
+    }
+    return 0;
+}