surge-XT: add build options

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt

index 31bee8d5..834ee6f6 100644

--- a/src/CMakeLists.txt

+++ b/src/CMakeLists.txt

@@ -12,6 +12,8 @@ if (NOT SURGE_COMPILE_BLOCK_SIZE)

   set(SURGE_COMPILE_BLOCK_SIZE 32)

 endif()

+option(SURGE_BUILD_CLAP "Build Surge as a CLAP" ON)

+

 set(SURGE_JUCE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/../libs/JUCE" CACHE STRING "Path to JUCE library source tree")

 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

@@ -29,7 +31,6 @@ if(${CMAKE_VERSION} VERSION_LESS 3.21)

   set(SURGE_BUILD_CLAP FALSE)

 else()

   message(STATUS "CMake version ${CMAKE_VERSION} allows CLAP build")

-  set(SURGE_BUILD_CLAP TRUE)

 endif()

 if(SURGE_BUILD_CLAP)

  libXext,

  libXinerama,

  libXrandr,

  buildVST3 ? true,

  buildLV2 ? true,

  buildCLAP ? true,

  buildStandalone ? true,

}:

stdenv.mkDerivation (finalAttrs: {

    hash = "sha256-4b0H3ZioiXFc4KCeQReobwQZJBl6Ep2/8JlRIwvq/hQ=";

  };

  patches = [

    # NOTE: merged in upstream, remove on package update

    #     (https://github.com/surge-synthesizer/surge/pull/8202)

    ./clap-option.diff

  ];

  postPatch = ''

    # see https://github.com/NixOS/nixpkgs/pull/149487#issuecomment-991747333

    export XDG_DOCUMENTS_DIR=$(mktemp -d)

    alsa-lib

    freetype

    libjack2

    lv2

    libX11

    libXcursor

    libXext

    libXinerama

    libXrandr

  ];

  ]

  ++ lib.optionals buildLV2 [ lv2 ];

  enableParallelBuilding = true;

  cmakeFlags = [

    "-DSURGE_BUILD_LV2=TRUE"

    (lib.cmakeBool "SURGE_SKIP_STANDALONE" (!buildStandalone))

    (lib.cmakeBool "SURGE_SKIP_VST3" (!buildVST3))

    (lib.cmakeBool "SURGE_SKIP_LV2" buildLV2)

    (lib.cmakeBool "SURGE_BUILD_CLAP" buildCLAP)

  ];

  # JUCE dlopen's these at runtime, crashes without them