feat: initial commit

CMakeLists.txt

@@ -0,0 +1,56 @@
+cmake_minimum_required(VERSION 3.16)
+project(merk LANGUAGES C CXX)
+
+# Standards
+set(CMAKE_C_STANDARD 11)
+set(CMAKE_C_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+option(BUILD_SHARED_LIBS "Build shared libraries by default" OFF)
+
+# Collect all source files under src/ (recursively).
+# CONFIGURE_DEPENDS makes CMake re-scan when files are added/removed.
+file(GLOB_RECURSE PROJECT_SOURCES CONFIGURE_DEPENDS
+     "${CMAKE_SOURCE_DIR}/src/*.c"
+     "${CMAKE_SOURCE_DIR}/src/*.cc"
+     "${CMAKE_SOURCE_DIR}/src/*.cpp"
+     "${CMAKE_SOURCE_DIR}/src/*.cxx")
+
+# Decide: executable (if src/main.* exists) or library (otherwise).
+set(MAIN_CANDIDATES
+    "${CMAKE_SOURCE_DIR}/src/main.c"
+    "${CMAKE_SOURCE_DIR}/src/main.cc"
+    "${CMAKE_SOURCE_DIR}/src/main.cpp"
+    "${CMAKE_SOURCE_DIR}/src/main.cxx")
+set(HAVE_MAIN FALSE)
+foreach(f IN LISTS MAIN_CANDIDATES)
+  if(EXISTS "${f}")
+    set(HAVE_MAIN TRUE)
+  endif()
+endforeach()
+
+if(HAVE_MAIN)
+  add_executable(merk ${PROJECT_SOURCES})
+  set(TARGET_NAME merk)
+else()
+  add_library(${PROJECT_NAME} ${PROJECT_SOURCES})
+  set(TARGET_NAME ${PROJECT_NAME})
+endif()
+
+# Public headers live in ./include
+target_include_directories(${TARGET_NAME}
+  PUBLIC "${CMAKE_SOURCE_DIR}/include"
+)
+
+# Sensible warnings
+if(MSVC)
+  target_compile_options(${TARGET_NAME} PRIVATE /W4 /permissive-)
+else()
+  target_compile_options(${TARGET_NAME} PRIVATE -Wall -Wextra -Wpedantic)
+endif()
+
+# Put built artifacts under build/bin and build/lib
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
+set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
+