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>

3 files changed, 98 insertions, 68 deletions

diff --git a/src/irmd/CMakeLists.txt b/src/irmd/CMakeLists.txt
new file mode 100644
index 00000000..d65635af
--- /dev/null
+++ b/src/irmd/CMakeLists.txt
@@ -0,0 +1,65 @@
+# IRMd (IPC Resource Manager daemon) build configuration
+# Configuration options are in cmake/config/global.cmake and cmake/config/irmd.cmake
+
+# Generate and install configuration files if TOML support available
+# HAVE_TOML is set in cmake/dependencies/irmd/libtoml.cmake
+if(HAVE_TOML)
+  set(INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}")
+  configure_file("${CMAKE_SOURCE_DIR}/irmd.conf.in"
+    "${CMAKE_BINARY_DIR}/${OUROBOROS_CONFIG_FILE}.example" @ONLY)
+  configure_file("${CMAKE_SOURCE_DIR}/enc.conf.in"
+    "${CMAKE_BINARY_DIR}/enc.conf.example" @ONLY)
+  install(FILES "${CMAKE_BINARY_DIR}/${OUROBOROS_CONFIG_FILE}.example"
+    DESTINATION "${OUROBOROS_CONFIG_DIR}")
+  install(FILES "${CMAKE_BINARY_DIR}/enc.conf.example"
+    DESTINATION "${OUROBOROS_CONFIG_DIR}")
+  install(CODE "
+    if(NOT EXISTS \"${OUROBOROS_CONFIG_DIR}/${OUROBOROS_CONFIG_FILE}\")
+      file(WRITE \"${OUROBOROS_CONFIG_DIR}/${OUROBOROS_CONFIG_FILE}\" \"\")
+    endif()
+  ")
+  unset(INSTALL_DIR)
+endif()
+
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/config.h.in"
+  "${CMAKE_CURRENT_BINARY_DIR}/config.h" @ONLY)
+
+set(IRMD_SOURCES
+  ipcp.c
+  configfile.c
+  main.c
+  oap/io.c
+  oap/hdr.c
+  oap/auth.c
+  oap/srv.c
+  oap/cli.c
+  reg/flow.c
+  reg/ipcp.c
+  reg/pool.c
+  reg/proc.c
+  reg/prog.c
+  reg/name.c
+  reg/reg.c
+)
+
+add_executable(irmd ${IRMD_SOURCES})
+
+target_include_directories(irmd PRIVATE
+  ${CMAKE_CURRENT_SOURCE_DIR}
+  ${CMAKE_CURRENT_BINARY_DIR}
+  ${CMAKE_SOURCE_DIR}/include
+  ${CMAKE_BINARY_DIR}/include)
+
+target_link_libraries(irmd PRIVATE ouroboros-common)
+if(HAVE_TOML)
+  target_link_libraries(irmd PRIVATE toml::toml)
+endif()
+
+ouroboros_target_debug_definitions(irmd)
+
+install(TARGETS irmd RUNTIME DESTINATION ${CMAKE_INSTALL_SBINDIR})
+
+if(BUILD_TESTS)
+  add_subdirectory(oap/tests)
+  add_subdirectory(reg/tests)
+endif()
diff --git a/src/irmd/oap/tests/CMakeLists.txt b/src/irmd/oap/tests/CMakeLists.txt
index 2e8f1319..2bf23821 100644
--- a/src/irmd/oap/tests/CMakeLists.txt
+++ b/src/irmd/oap/tests/CMakeLists.txt
@@ -1,5 +1,5 @@
-get_filename_component(tmp ".." ABSOLUTE)
-get_filename_component(src_folder "${tmp}" NAME)
+get_filename_component(PARENT_PATH ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
+get_filename_component(PARENT_DIR ${PARENT_PATH} NAME)
 
 get_filename_component(OAP_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}" DIRECTORY)
 get_filename_component(OAP_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}" DIRECTORY)
@@ -8,12 +8,12 @@ get_filename_component(IRMD_BINARY_DIR "${OAP_BINARY_DIR}" DIRECTORY)
 
 compute_test_prefix()
 
-create_test_sourcelist(${src_folder}_tests test_suite.c
+create_test_sourcelist(${PARENT_DIR}_tests test_suite.c
   # Add new tests here
   oap_test.c
 )
 
-create_test_sourcelist(${src_folder}_pqc_tests test_suite_pqc.c
+create_test_sourcelist(${PARENT_DIR}_pqc_tests test_suite_pqc.c
   # PQC-specific tests
   oap_test_pqc.c
 )
@@ -29,59 +29,36 @@ set(OAP_TEST_SOURCES
 )
 
 # Regular test executable (ECDSA)
-add_executable(${src_folder}_test ${${src_folder}_tests} ${OAP_TEST_SOURCES})
+add_executable(${PARENT_DIR}_test ${${PARENT_DIR}_tests} ${OAP_TEST_SOURCES})
 set_source_files_properties(${OAP_TEST_SOURCES}
   PROPERTIES COMPILE_DEFINITIONS "OAP_TEST_MODE"
 )
 
-disable_test_logging_for_target(${src_folder}_test)
-target_link_libraries(${src_folder}_test ouroboros-irm)
-target_include_directories(${src_folder}_test PRIVATE
+disable_test_logging_for_target(${PARENT_DIR}_test)
+target_link_libraries(${PARENT_DIR}_test ouroboros-irm)
+target_include_directories(${PARENT_DIR}_test PRIVATE
   ${IRMD_SOURCE_DIR}
   ${IRMD_BINARY_DIR}
 )
 
 # PQC test executable (ML-DSA)
-add_executable(${src_folder}_pqc_test ${${src_folder}_pqc_tests} ${OAP_TEST_SOURCES})
+add_executable(${PARENT_DIR}_pqc_test ${${PARENT_DIR}_pqc_tests} ${OAP_TEST_SOURCES})
 set_source_files_properties(${OAP_TEST_SOURCES}
-  TARGET_DIRECTORY ${src_folder}_pqc_test
+  TARGET_DIRECTORY ${PARENT_DIR}_pqc_test
   PROPERTIES COMPILE_DEFINITIONS "OAP_TEST_MODE"
 )
 
-disable_test_logging_for_target(${src_folder}_pqc_test)
-target_link_libraries(${src_folder}_pqc_test ouroboros-irm)
-target_include_directories(${src_folder}_pqc_test PRIVATE
+disable_test_logging_for_target(${PARENT_DIR}_pqc_test)
+target_link_libraries(${PARENT_DIR}_pqc_test ouroboros-irm)
+target_include_directories(${PARENT_DIR}_pqc_test PRIVATE
   ${IRMD_SOURCE_DIR}
   ${IRMD_BINARY_DIR}
 )
 
-add_dependencies(build_tests ${src_folder}_test ${src_folder}_pqc_test)
+add_dependencies(build_tests ${PARENT_DIR}_test ${PARENT_DIR}_pqc_test)
 
 # Regular tests
-set(tests_to_run ${${src_folder}_tests})
-if(CMAKE_VERSION VERSION_LESS "3.29.0")
-  remove(tests_to_run test_suite.c)
-else ()
-  list(POP_FRONT tests_to_run)
-endif()
-
-foreach(test ${tests_to_run})
-  get_filename_component(test_name ${test} NAME_WE)
-  add_test(${TEST_PREFIX}/${test_name} ${CMAKE_CURRENT_BINARY_DIR}/${src_folder}_test ${test_name})
-endforeach(test)
+ouroboros_register_tests(TARGET ${PARENT_DIR}_test TESTS ${${PARENT_DIR}_tests})
 
 # PQC tests
-set(pqc_tests_to_run ${${src_folder}_pqc_tests})
-if(CMAKE_VERSION VERSION_LESS "3.29.0")
-  remove(pqc_tests_to_run test_suite_pqc.c)
-else ()
-  list(POP_FRONT pqc_tests_to_run)
-endif()
-
-foreach(test ${pqc_tests_to_run})
-  get_filename_component(test_name ${test} NAME_WE)
-  add_test(${TEST_PREFIX}/${test_name} ${CMAKE_CURRENT_BINARY_DIR}/${src_folder}_pqc_test ${test_name})
-endforeach(test)
-
-set_property(TEST ${TEST_PREFIX}/oap_test PROPERTY SKIP_RETURN_CODE 1)
-set_property(TEST ${TEST_PREFIX}/oap_test_pqc PROPERTY SKIP_RETURN_CODE 1)
+ouroboros_register_tests(TARGET ${PARENT_DIR}_pqc_test TESTS ${${PARENT_DIR}_pqc_tests})
diff --git a/src/irmd/reg/tests/CMakeLists.txt b/src/irmd/reg/tests/CMakeLists.txt
index 759d29b4..e8521545 100644
--- a/src/irmd/reg/tests/CMakeLists.txt
+++ b/src/irmd/reg/tests/CMakeLists.txt
@@ -1,17 +1,9 @@
-get_filename_component(tmp ".." ABSOLUTE)
-get_filename_component(src_folder "${tmp}" NAME)
+get_filename_component(PARENT_PATH ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY)
+get_filename_component(PARENT_DIR ${PARENT_PATH} NAME)
 
 compute_test_prefix()
 
-# Set include directories for tests
-include_directories(${CMAKE_CURRENT_SOURCE_DIR})
-include_directories(${CMAKE_CURRENT_BINARY_DIR})
-include_directories(${CMAKE_SOURCE_DIR}/include)
-include_directories(${CMAKE_BINARY_DIR}/include)
-include_directories(${CMAKE_SOURCE_DIR}/src/irmd)
-include_directories(${CMAKE_BINARY_DIR}/src/irmd)
-
-create_test_sourcelist(${src_folder}_tests test_suite.c
+create_test_sourcelist(${PARENT_DIR}_tests test_suite.c
   # Add new tests here
   flow_test.c
   ipcp_test.c
@@ -21,25 +13,21 @@ create_test_sourcelist(${src_folder}_tests test_suite.c
   reg_test.c
 )
 
-add_executable(${src_folder}_test ${${src_folder}_tests})
-
-disable_test_logging_for_target(${src_folder}_test)
-target_link_libraries(${src_folder}_test ouroboros-common)
+add_executable(${PARENT_DIR}_test ${${PARENT_DIR}_tests})
 
-if (CMAKE_BUILD_TYPE MATCHES "Debug*")
-  add_compile_flags(${src_folder}_test -DCONFIG_OUROBOROS_DEBUG)
-endif ()
+target_include_directories(${PARENT_DIR}_test PRIVATE
+  ${CMAKE_CURRENT_SOURCE_DIR}
+  ${CMAKE_CURRENT_BINARY_DIR}
+  ${CMAKE_SOURCE_DIR}/include
+  ${CMAKE_BINARY_DIR}/include
+  ${CMAKE_SOURCE_DIR}/src/irmd
+  ${CMAKE_BINARY_DIR}/src/irmd
+)
 
-add_dependencies(build_tests ${src_folder}_test)
+disable_test_logging_for_target(${PARENT_DIR}_test)
+target_link_libraries(${PARENT_DIR}_test PRIVATE ouroboros-common)
+ouroboros_target_debug_definitions(${PARENT_DIR}_test)
 
-set(tests_to_run ${${src_folder}_tests})
-if(CMAKE_VERSION VERSION_LESS "3.29.0")
-  remove(tests_to_run test_suite.c)
-else ()
-  list(POP_FRONT tests_to_run)
-endif()
+add_dependencies(build_tests ${PARENT_DIR}_test)
 
-foreach(test ${tests_to_run})
-  get_filename_component(test_name ${test} NAME_WE)
-  add_test(${TEST_PREFIX}/${test_name} ${CMAKE_CURRENT_BINARY_DIR}/${src_folder}_test ${test_name})
-endforeach(test)
+ouroboros_register_tests(TARGET ${PARENT_DIR}_test TESTS ${${PARENT_DIR}_tests})