build: Refactor CMake back to in-tree CMakeListsbe

This moves the build definitions back to src/ subdirectories
(CMakeLists.txt per component). Configuration and dependencies are
kept out of tree. Configuration options are bundled into cmake/config/
modules. Dependencies are grouped by component (system/, crypt/, eth/,
coverage/, etc.). It now consistently uses target-based commands
(target_include_directories, target_link_libraries) instead of global
include_directories(). Proper PRIVATE/PUBLIC visibility for executable
link libraries. CONFIG_OUROBOROS_DEBUG now properly set based on being
a valid debug config (not just checking the string name).

It also adds OuroborosTargets export for find_package() support and
CMake package config files (OuroborosConfig.cmake) for easier
integration with CMake projects.

The build logic now follows more idiomatic CMake practices with
configuration separated from target definitions.

Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks>
Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>

1 files changed, 33 insertions, 1 deletions

diff --git a/cmake/utils/TestUtils.cmake b/cmake/utils/TestUtils.cmake
index e40bdda1..e602690c 100644
--- a/cmake/utils/TestUtils.cmake
+++ b/cmake/utils/TestUtils.cmake
@@ -3,4 +3,36 @@ function(compute_test_prefix)
   file(RELATIVE_PATH _prefix "${CMAKE_SOURCE_DIR}/src" "${CMAKE_CURRENT_SOURCE_DIR}")
   string(REGEX REPLACE "/tests$" "" _prefix "${_prefix}")
   set(TEST_PREFIX "${_prefix}" PARENT_SCOPE)
-endfunction(compute_test_prefix)
+endfunction()
+
+# Register tests from a test executable with the test framework
+# Usage: ouroboros_register_tests(TARGET <target> TESTS <test_list> [ENVIRONMENT <env>])
+# The TESTS argument should be the test list variable created by create_test_sourcelist
+function(ouroboros_register_tests)
+  cmake_parse_arguments(PARSE_ARGV 0 ARG "" "TARGET;ENVIRONMENT" "TESTS")
+
+  if(NOT ARG_TARGET)
+    message(FATAL_ERROR "ouroboros_register_tests: TARGET required")
+  endif()
+
+  if(NOT ARG_TESTS)
+    message(FATAL_ERROR "ouroboros_register_tests: TESTS required")
+  endif()
+
+  # First entry is the test driver, skip it
+  set(_tests ${ARG_TESTS})
+  list(POP_FRONT _tests)
+
+  foreach (test_src ${_tests})
+    get_filename_component(test_name ${test_src} NAME_WE)
+    add_test(${TEST_PREFIX}/${test_name}
+             ${CMAKE_CURRENT_BINARY_DIR}/${ARG_TARGET} ${test_name})
+    # All Ouroboros tests support skip return code
+    set_property(TEST ${TEST_PREFIX}/${test_name} PROPERTY SKIP_RETURN_CODE 1)
+    # Optional environment variables
+    if(ARG_ENVIRONMENT)
+      set_property(TEST ${TEST_PREFIX}/${test_name}
+                   PROPERTY ENVIRONMENT "${ARG_ENVIRONMENT}")
+    endif()
+  endforeach ()
+endfunction()