flake : update flake.nix (#2270)

When `isx86_32 || isx86_64`, it will use mkl, else openblas

According to
https://discourse.nixos.org/t/rpath-of-binary-contains-a-forbidden-reference-to-build/12200/3,
add -DCMAKE_SKIP_BUILD_RPATH=ON

Fix #2261, Nix doesn't provide mkl-sdl.pc.
When we build with -DBUILD_SHARED_LIBS=ON, -DLLAMA_BLAS_VENDOR=Intel10_lp64
replace mkl-sdl.pc by mkl-dynamic-lp64-iomp.pc

CMakeLists.txt

@@ -186,7 +186,16 @@ if (LLAMA_BLAS)
                 pkg_check_modules(DepBLAS REQUIRED flexiblas_api)
             elseif (${LLAMA_BLAS_VENDOR} MATCHES "Intel")
                 # all Intel* libraries share the same include path
-                pkg_check_modules(DepBLAS REQUIRED mkl-sdl)
+                pkg_check_modules(DepBLAS mkl-sdl)
+                if (NOT DepBLAS)
+                    if (BUILD_SHARED_LIBS)
+                        set(LINK_METHOD dynamic)
+                    else()
+                        set(LINK_METHOD static)
+                    endif()
+                    string(REGEX REPLACE ".*_" "" DATA_TYPE_MODEL ${LLAMA_BLAS_VENDOR})
+                    pkg_check_modules(DepBLAS REQUIRED mkl-${LINK_METHOD}-${DATA_TYPE_MODEL}-iomp)
+                endif()
             elseif (${LLAMA_BLAS_VENDOR} MATCHES "NVHPC")
                 # this doesn't provide pkg-config
                 # suggest to assign BLAS_INCLUDE_DIRS on your own

README.md

@@ -360,7 +360,7 @@ Building the program with BLAS support may lead to some performance improvements
   ```bash
   mkdir build
   cd build
-  cmake .. -DLLAMA_BLAS=ON -DLLAMA_BLAS_VENDOR=Intel10_64lp -DCMAKE_C_COMPILER=icx -DCMAKE_CXX_COMPILER=icpx
+  cmake .. -DLLAMA_BLAS=ON -DLLAMA_BLAS_VENDOR=Intel10_lp64 -DCMAKE_C_COMPILER=icx -DCMAKE_CXX_COMPILER=icpx
   cmake --build . --config Release
   ```
 

flake.nix

@@ -6,24 +6,27 @@
   outputs = { self, nixpkgs, flake-utils }:
     flake-utils.lib.eachDefaultSystem (system:
       let
-        inherit (pkgs.stdenv) isAarch64 isDarwin;
-        inherit (pkgs.lib) optionals;
-        isM1 = isAarch64 && isDarwin;
-        osSpecific = if isM1 then
-          with pkgs.darwin.apple_sdk_11_0.frameworks; [
-            Accelerate
-            MetalKit
-            MetalPerformanceShaders
-            MetalPerformanceShadersGraph
-          ]
-        else if isDarwin then
-          with pkgs.darwin.apple_sdk.frameworks; [
-            Accelerate
-            CoreGraphics
-            CoreVideo
-          ]
-        else
-          [ ];
+        inherit (pkgs.stdenv) isAarch32 isAarch64 isx86_32 isx86_64 isDarwin;
+        osSpecific = with pkgs; [ openmpi ] ++
+        (
+          if isAarch64 && isDarwin then
+            with pkgs.darwin.apple_sdk_11_0.frameworks; [
+              Accelerate
+              MetalKit
+              MetalPerformanceShaders
+              MetalPerformanceShadersGraph
+            ]
+          else if isAarch32 && isDarwin then
+            with pkgs.darwin.apple_sdk.frameworks; [
+              Accelerate
+              CoreGraphics
+              CoreVideo
+            ]
+          else if isx86_32 || isx86_64 then
+            with pkgs; [ mkl ]
+          else
+            with pkgs; [ openblas ]
+        );
         pkgs = import nixpkgs { inherit system; };
         llama-python =
           pkgs.python310.withPackages (ps: with ps; [ numpy sentencepiece ]);
@@ -31,22 +34,28 @@
         packages.default = pkgs.stdenv.mkDerivation {
           name = "llama.cpp";
           src = ./.;
-          postPatch = if isM1 then ''
+          postPatch = ''
             substituteInPlace ./ggml-metal.m \
               --replace '[bundle pathForResource:@"ggml-metal" ofType:@"metal"];' "@\"$out/bin/ggml-metal.metal\";"
-          '' else
-            "";
-          nativeBuildInputs = with pkgs; [ cmake ];
+          '';
+          nativeBuildInputs = with pkgs; [ cmake pkgconfig ];
           buildInputs = osSpecific;
-          cmakeFlags = [ "-DLLAMA_BUILD_SERVER=ON" ] ++ (optionals isM1 [
-            "-DCMAKE_C_FLAGS=-D__ARM_FEATURE_DOTPROD=1"
-            "-DLLAMA_METAL=ON"
+          cmakeFlags = [ "-DLLAMA_BUILD_SERVER=ON" "-DLLAMA_MPI=ON" "-DBUILD_SHARED_LIBS=ON" "-DCMAKE_SKIP_BUILD_RPATH=ON" ]
+            ++ (if isAarch64 && isDarwin then [
+              "-DCMAKE_C_FLAGS=-D__ARM_FEATURE_DOTPROD=1"
+              "-DLLAMA_METAL=ON"
+            ] else if isx86_32 || isx86_64 then [
+              "-DLLAMA_BLAS=ON"
+              "-DLLAMA_BLAS_VENDOR=Intel10_lp64"
+            ] else [
+              "-DLLAMA_BLAS=ON"
+              "-DLLAMA_BLAS_VENDOR=OpenBLAS"
           ]);
           installPhase = ''
             runHook preInstall
 
-            mkdir -p $out/bin
-            mv bin/* $out/bin/
+            install -D bin/* -t $out/bin
+            install -Dm644 lib*.so -t $out/lib
             mv $out/bin/main $out/bin/llama
             mv $out/bin/server $out/bin/llama-server