added sqlite-vec extension

packages/sqlite3_vec/android/CMakeLists.txt

@@ -0,0 +1,77 @@
+cmake_minimum_required(VERSION 3.10)
+
+# Set the project name
+project(sqlite_vec)
+
+# Set default compiler if not provided
+if(NOT CMAKE_C_COMPILER)
+    set(CMAKE_C_COMPILER gcc)
+endif()
+
+# Configure Android specific settings
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")
+
+include(FetchContent)
+if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.24.0")
+  # cmake 3.24.0 added the `DOWNLOAD_EXTRACT_TIMESTAMP` and prints an ugly warning when
+  # the default is used, so override it to the recommended behavior.
+  # We can't really ask users to use a cmake that recent, so there's this if here.
+  FetchContent_Declare(
+    sqlite3
+    URL https://sqlite.org/2024/sqlite-autoconf-3470200.tar.gz
+    DOWNLOAD_EXTRACT_TIMESTAMP NEW
+  )
+
+  FetchContent_Declare(
+    vec0
+    URL https://github.com/asg017/sqlite-vec/archive/refs/tags/v0.1.7-alpha.2.tar.gz
+    DOWNLOAD_EXTRACT_TIMESTAMP NEW
+  )
+else()
+  FetchContent_Declare(
+    sqlite3
+    URL https://sqlite.org/2024/sqlite-autoconf-3470200.tar.gz
+  )
+
+  FetchContent_Declare(
+    vec0
+    URL https://github.com/asg017/sqlite-vec/archive/refs/tags/v0.1.7-alpha.2.tar.gz
+  )
+endif()
+
+FetchContent_MakeAvailable(sqlite3)
+FetchContent_MakeAvailable(vec0)
+
+add_custom_command(
+    OUTPUT ${vec0_SOURCE_DIR}/sqlite-vec.h
+    COMMAND make sqlite-vec.h
+    WORKING_DIRECTORY ${vec0_SOURCE_DIR}
+    COMMENT "Building sqlite-vec.h with make"
+)
+
+add_custom_target(generate_vec_header
+    DEPENDS ${vec0_SOURCE_DIR}/sqlite-vec.h
+)
+
+add_library(vec0 
+    SHARED 
+    ${vec0_SOURCE_DIR}/sqlite-vec.c
+)
+
+add_dependencies(vec0 generate_vec_header)
+
+# Include directories
+target_include_directories(vec0 
+    PRIVATE 
+    ${vec0_SOURCE_DIR}
+    ${sqlite3_SOURCE_DIR}
+)
+
+# Set compile options
+target_compile_options(vec0 
+    PRIVATE 
+    -Wall 
+    -Wextra 
+    -O3
+)