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, 15 insertions, 23 deletions

diff --git a/cmake/compiler.cmake b/cmake/compiler.cmake
index 6258cca0..5d452e02 100644
--- a/cmake/compiler.cmake
+++ b/cmake/compiler.cmake
@@ -31,42 +31,34 @@ test_and_set_c_compiler_flag_global(-Wdeclaration-after-statement)
 test_and_set_c_compiler_flag_global(-Winfinite-recursion)
 test_and_set_c_compiler_flag_global(-fmax-errors=5)
 
-set(DISABLE_COVERAGE ON CACHE BOOL "Disable code coverage analysis")
-
-if (NOT DISABLE_COVERAGE)
-  test_and_set_c_compiler_flag_global(-g)
-  test_and_set_c_compiler_flag_global(--coverage)
-  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --coverage")
-  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} --coverage")
-  set(ENABLE_COVERAGE ON)
-else()
-  set(ENABLE_COVERAGE OFF)
-endif()
-
-if (NOT CMAKE_BUILD_TYPE)
+if(NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE "Release" CACHE STRING
       "Build type (Release, Debug, DebugASan, DebugTSan, DebugLSan, DebugUSan, DebugAnalyzer)" FORCE)
 endif()
 
-if (CMAKE_BUILD_TYPE STREQUAL "Release")
+if(CMAKE_BUILD_TYPE STREQUAL "Release")
   test_and_set_c_compiler_flag_global(-O3)
-elseif (CMAKE_BUILD_TYPE STREQUAL "Debug")
+elseif(CMAKE_BUILD_TYPE STREQUAL "Debug")
   test_and_set_c_compiler_flag_global(-g)
-elseif (CMAKE_BUILD_TYPE STREQUAL "DebugASan")
+elseif(CMAKE_BUILD_TYPE STREQUAL "DebugASan")
   test_and_set_c_compiler_flag_global(-g)
   test_and_set_c_compiler_flag_global(-fsanitize=address)
-elseif (CMAKE_BUILD_TYPE STREQUAL "DebugTSan")
+  add_link_options(-fsanitize=address)
+elseif(CMAKE_BUILD_TYPE STREQUAL "DebugTSan")
   test_and_set_c_compiler_flag_global(-g)
   test_and_set_c_compiler_flag_global(-fsanitize=thread)
-elseif (CMAKE_BUILD_TYPE STREQUAL "DebugLSan")
+  add_link_options(-fsanitize=thread)
+elseif(CMAKE_BUILD_TYPE STREQUAL "DebugLSan")
   test_and_set_c_compiler_flag_global(-g)
   test_and_set_c_compiler_flag_global(-fsanitize=leak)
-elseif (CMAKE_BUILD_TYPE STREQUAL "DebugUSan")
+  add_link_options(-fsanitize=leak)
+elseif(CMAKE_BUILD_TYPE STREQUAL "DebugUSan")
   test_and_set_c_compiler_flag_global(-g)
   test_and_set_c_compiler_flag_global(-fsanitize=undefined)
-elseif (CMAKE_BUILD_TYPE STREQUAL "DebugAnalyzer")
+  add_link_options(-fsanitize=undefined)
+elseif(CMAKE_BUILD_TYPE STREQUAL "DebugAnalyzer")
   test_and_set_c_compiler_flag_global(-g)
   test_and_set_c_compiler_flag_global(-fanalyzer)
-else ()
-  message(FATAL_ERROR "Unkown build type ${CMAKE_BUILD_TYPE}")
-endif ()
+else()
+  message(FATAL_ERROR "Unknown build type ${CMAKE_BUILD_TYPE}")
+endif()