added blake3 as a submodule. compiles. Rule No. 1: never push code that won't compiled

.gitmodules

@@ -13,3 +13,6 @@
 [submodule "external/json"]
 	path = external/json
 	url = https://github.com/nlohmann/json
+[submodule "external/BLAKE3"]
+	path = external/BLAKE3
+	url = https://github.com/BLAKE3-team/BLAKE3

CMakeLists.txt

@@ -1,18 +1,28 @@
 cmake_minimum_required(VERSION 3.20)
-project(email-tracker LANGUAGES CXX)
+
+# -----------------------------
+# Project setup
+# -----------------------------
+# Use Clang explicitly (you can override from CLI if needed)
+set(CMAKE_C_COMPILER clang)
+set(CMAKE_CXX_COMPILER clang++)
+
+project(email-tracker LANGUAGES C CXX)
 
 set(CMAKE_CXX_STANDARD 23)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+set(CMAKE_BUILD_TYPE Release)
 
 # -----------------------------
-# Dependencies
+# Dependencies (all local submodules)
 # -----------------------------
 add_subdirectory(external/fmt)
 add_subdirectory(external/spdlog)
 add_subdirectory(external/tomlplusplus)
 add_subdirectory(external/duckdb)
 add_subdirectory(external/json)
+add_subdirectory(external/BLAKE3/c)
 
 # -----------------------------
 # Executables
@@ -23,17 +33,25 @@ add_executable(${PROJECT_NAME}-daemon src/main-daemon.cpp)
 # -----------------------------
 # Common libraries
 # -----------------------------
-set(COMMON_LIBS fmt spdlog tomlplusplus duckdb_static nlohmann_json)
+set(COMMON_LIBS
+    fmt
+    spdlog
+    tomlplusplus
+    duckdb_static
+    nlohmann_json
+    blake3
+)
 
 # -----------------------------
-# External includes
+# External include directories
 # -----------------------------
 set(EXTERNAL_INCLUDES
-    external/fmt/include
-    external/spdlog/include
-    external/tomlplusplus/include
-    external/duckdb/src/include
-    external/json/include/nlohmann
+    ${CMAKE_CURRENT_SOURCE_DIR}/external/fmt/include
+    ${CMAKE_CURRENT_SOURCE_DIR}/external/spdlog/include
+    ${CMAKE_CURRENT_SOURCE_DIR}/external/tomlplusplus/include
+    ${CMAKE_CURRENT_SOURCE_DIR}/external/duckdb/src/include
+    ${CMAKE_CURRENT_SOURCE_DIR}/external/json/include/nlohmann
+    ${CMAKE_CURRENT_SOURCE_DIR}/external/BLAKE3/c
 )
 
 # -----------------------------
@@ -48,7 +66,7 @@ foreach(dir ${SRC_SUBDIRS})
 endforeach()
 
 # -----------------------------
-# Automatically include all .cpp under src/
+# Automatically include all .cpp files under src/
 # Exclude main files to avoid multiple main() definitions
 # -----------------------------
 file(GLOB_RECURSE ALL_CPP "${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp")
@@ -58,16 +76,18 @@ list(REMOVE_ITEM ALL_CPP
 )
 
 # -----------------------------
-# Apply to targets
+# Apply configuration to all targets
 # -----------------------------
 foreach(target ${PROJECT_NAME}-client ${PROJECT_NAME}-daemon)
-    # Link common libraries
     target_link_libraries(${target} PRIVATE ${COMMON_LIBS})
-
-    # Include directories
     target_include_directories(${target} PRIVATE ${EXTERNAL_INCLUDES} ${SRC_INCLUDES})
-
-    # Add all .cpp sources dynamically
     target_sources(${target} PRIVATE ${ALL_CPP})
 endforeach()
 
+# -----------------------------
+# Optional: warnings and strict flags for Clang
+# -----------------------------
+if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+    add_compile_options(-Wall -Wextra -Wpedantic -Wconversion)
+endif()
+