Add compiler flags to disable safetensors and gguf (#1098)

* with docs

* nit

CMakeLists.txt

@@ -17,6 +17,8 @@ option(MLX_BUILD_PYTHON_BINDINGS "Build python bindings for mlx" OFF)
 option(MLX_BUILD_METAL "Build metal backend" ON)
 option(MLX_METAL_DEBUG "Enhance metal debug workflow" OFF)
 option(MLX_ENABLE_X64_MAC "Enable building for x64 macOS" OFF)
+option(MLX_BUILD_GGUF "Include support for GGUF format" ON)
+option(MLX_BUILD_SAFETENSORS "Include support for safetensors format" ON)
 option(BUILD_SHARED_LIBS "Build mlx as a shared library" OFF)
 
 if(NOT MLX_VERSION)

docs/src/install.rst

@@ -157,7 +157,10 @@ should point to the path to the built metal library.
      - OFF
    * - MLX_METAL_DEBUG
      - OFF
-
+   * - MLX_BUILD_SAFETENSORS
+     - ON
+   * - MLX_BUILD_GGUF
+     - ON
 
 .. note::
 

mlx/io.h

@@ -6,8 +6,8 @@
 
 #include "mlx/array.h"
 #include "mlx/io/load.h"
-#include "mlx/ops.h"
 #include "mlx/stream.h"
+#include "mlx/utils.h"
 
 namespace mlx::core {
 using GGUFMetaData =

mlx/io/CMakeLists.txt

@@ -1,12 +1,11 @@
+
 target_sources(
   mlx
   PRIVATE
   ${CMAKE_CURRENT_SOURCE_DIR}/load.cpp
-  ${CMAKE_CURRENT_SOURCE_DIR}/safetensor.cpp
-  ${CMAKE_CURRENT_SOURCE_DIR}/gguf.cpp
-  ${CMAKE_CURRENT_SOURCE_DIR}/gguf_quants.cpp
 )
 
+if (MLX_BUILD_SAFETENSORS)
   MESSAGE(STATUS "Downloading json")
   FetchContent_Declare(json URL https://github.com/nlohmann/json/releases/download/v3.11.3/json.tar.xz)
   FetchContent_MakeAvailable(json)
@@ -14,7 +13,20 @@ target_include_directories(
     mlx PRIVATE
       $<BUILD_INTERFACE:${json_SOURCE_DIR}/single_include/nlohmann>
   )
+  target_sources(
+    mlx
+    PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/safetensors.cpp
+  )
+else()
+  target_sources(
+    mlx
+    PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/no_safetensors.cpp
+  )
+endif()
 
+if (MLX_BUILD_GGUF)
   MESSAGE(STATUS "Downloading gguflib")
   FetchContent_Declare(gguflib
       GIT_REPOSITORY     https://github.com/antirez/gguf-tools/
@@ -25,9 +37,22 @@ target_include_directories(
     mlx PRIVATE
       $<BUILD_INTERFACE:${gguflib_SOURCE_DIR}>
   )
-
   add_library(
     gguflib STATIC
     ${gguflib_SOURCE_DIR}/fp16.c
     ${gguflib_SOURCE_DIR}/gguflib.c)
   target_link_libraries(mlx $<BUILD_INTERFACE:gguflib>)
+  target_sources(
+    mlx
+    PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/gguf.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/gguf_quants.cpp
+  )
+else()
+  target_sources(
+    mlx
+    PRIVATE
+    ${CMAKE_CURRENT_SOURCE_DIR}/no_gguf.cpp
+  )
+endif()
+

mlx/io/gguf.cpp

@@ -4,7 +4,8 @@
 #include <cstring>
 #include <numeric>
 
-#include <mlx/io/gguf.h>
+#include "mlx/io/gguf.h"
+#include "mlx/ops.h"
 
 namespace mlx::core {
 

mlx/io/gguf_quants.cpp

@@ -4,7 +4,7 @@
 #include <cstring>
 #include <numeric>
 
-#include <mlx/io/gguf.h>
+#include "mlx/io/gguf.h"
 
 namespace mlx::core {
 

mlx/io/no_gguf.cpp

@@ -0,0 +1,20 @@
+// Copyright © 2023-2024 Apple Inc.
+
+#include "mlx/io.h"
+
+namespace mlx::core {
+
+GGUFLoad load_gguf(const std::string&, StreamOrDevice s) {
+  throw std::runtime_error(
+      "[load_gguf] Compile with MLX_BUILD_GGUF=ON to enable GGUF support.");
+}
+
+void save_gguf(
+    std::string,
+    std::unordered_map<std::string, array>,
+    std::unordered_map<std::string, GGUFMetaData>) {
+  throw std::runtime_error(
+      "[save_gguf] Compile with MLX_BUILD_GGUF=ON to enable GGUF support.");
+}
+
+} // namespace mlx::core

mlx/io/no_safetensors.cpp

@@ -0,0 +1,37 @@
+// Copyright © 2023-2024 Apple Inc.
+
+#include "mlx/io.h"
+
+namespace mlx::core {
+
+SafetensorsLoad load_safetensors(std::shared_ptr<io::Reader>, StreamOrDevice) {
+  throw std::runtime_error(
+      "[load_safetensors] Compile with MLX_BUILD_SAFETENSORS=ON "
+      "to enable safetensors support.");
+}
+
+SafetensorsLoad load_safetensors(const std::string&, StreamOrDevice) {
+  throw std::runtime_error(
+      "[load_safetensors] Compile with MLX_BUILD_SAFETENSORS=ON "
+      "to enable safetensors support.");
+}
+
+void save_safetensors(
+    std::shared_ptr<io::Writer>,
+    std::unordered_map<std::string, array>,
+    std::unordered_map<std::string, std::string>) {
+  throw std::runtime_error(
+      "[save_safetensors] Compile with MLX_BUILD_SAFETENSORS=ON "
+      "to enable safetensors support.");
+}
+
+void save_safetensors(
+    std::string file,
+    std::unordered_map<std::string, array>,
+    std::unordered_map<std::string, std::string>) {
+  throw std::runtime_error(
+      "[save_safetensors] Compile with MLX_BUILD_SAFETENSORS=ON "
+      "to enable safetensors support.");
+}
+
+} // namespace mlx::core

mlx/io/safetensors.cpp

@@ -5,6 +5,7 @@
 
 #include "mlx/io.h"
 #include "mlx/io/load.h"
+#include "mlx/ops.h"
 #include "mlx/primitives.h"
 
 using json = nlohmann::json;
@@ -149,7 +150,6 @@ SafetensorsLoad load_safetensors(const std::string& file, StreamOrDevice s) {
   return load_safetensors(std::make_shared<io::FileReader>(file), s);
 }
 
-/** Save array to out stream in .npy format */
 void save_safetensors(
     std::shared_ptr<io::Writer> out_stream,
     std::unordered_map<std::string, array> a,