usse vcpkg just for the libsndfile build chain

Tools/CMake/vcpkg/ports/libflac/android-cmake.diff

@@ -0,0 +1,13 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 9396130..11ef59d 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -122,7 +122,7 @@ else()
+ endif()
+ 
+ 
+-if(ANDROID AND CMAKE_SYSTEM_VERSION VERSION_LESS 24 AND (CMAKE_SYSTEM_PROCESSOR MATCHES "i686" OR CMAKE_SYSTEM_PROCESSOR MATCHES "armv7-a"))
++if(ANDROID AND ANDROID_NATIVE_API_LEVEL VERSION_LESS "24" AND (CMAKE_SYSTEM_PROCESSOR MATCHES "i686" OR CMAKE_SYSTEM_PROCESSOR MATCHES "armv7-a"))
+     # fseeko/ftello may link, but it's not usable before Android API 24 on 32-bit Android
+     # https://android.googlesource.com/platform/bionic/+/main/docs/32-bit-abi.md
+     message(STATUS "Disabling fseeko/ftello for 32-bit Android before API 24")

Tools/CMake/vcpkg/ports/libflac/fix-compile-options.patch

@@ -0,0 +1,18 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index c83dd83..2d1a7e6 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -82,9 +82,11 @@ if(HAVE_WERROR_FLAG)
+     option(ENABLE_WERROR "Enable -Werror in all Makefiles" OFF)
+ endif()
+ 
++if(MSVC AND NOT WITH_ASM)
++    add_compile_options(/wd4267 /wd4996)
++endif()
++
+ add_compile_options(
+-    $<$<BOOL:${MSVC}>:/wd4267>
+-    $<$<BOOL:${MSVC}>:/wd4996>
+     $<$<BOOL:${ENABLE_WERROR}>:-Werror>
+     $<$<AND:$<COMPILE_LANGUAGE:CXX>,$<BOOL:${HAVE_WEFFCXX_FLAG}>>:-Weffc++>
+     $<$<AND:$<COMPILE_LANGUAGE:C>,$<BOOL:${HAVE_DECL_AFTER_STMT_FLAG}>>:-Wdeclaration-after-statement>)

Tools/CMake/vcpkg/ports/libflac/fix-find-threads.patch

@@ -0,0 +1,15 @@
+diff --git a/flac-config.cmake.in b/flac-config.cmake.in
+index bcafc4c8..dcf299dd 100644
+--- a/flac-config.cmake.in
++++ b/flac-config.cmake.in
+@@ -5,6 +5,10 @@ if(NOT TARGET Ogg::ogg)
+     find_dependency(Ogg)
+ endif()
+ 
++if (@ENABLE_MULTITHREADING@)
++    find_dependency(Threads)
++endif()
++
+ include("${CMAKE_CURRENT_LIST_DIR}/targets.cmake")
+ 
+ if(TARGET FLAC::FLAC)

Tools/CMake/vcpkg/ports/libflac/portfile.cmake

@@ -0,0 +1,80 @@
+set(LOCAL_ARCHIVE "$ENV{VCPKG_LIB_SOURCE_ROOT}/xiph-flac-1.5.0.tar.gz")
+
+vcpkg_extract_source_archive(
+    SOURCE_PATH
+    ARCHIVE "${LOCAL_ARCHIVE}"
+    PATCHES
+        android-cmake.diff
+        fix-compile-options.patch
+        fix-find-threads.patch
+)
+
+if("asm" IN_LIST FEATURES)
+    vcpkg_find_acquire_program(NASM)
+    get_filename_component(NASM_PATH "${NASM}" DIRECTORY)
+    vcpkg_add_to_path("${NASM_PATH}")
+endif()
+
+vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
+    FEATURES
+        asm WITH_ASM
+        stack-protector WITH_STACK_PROTECTOR
+        multithreading ENABLE_MULTITHREADING
+)
+
+vcpkg_cmake_configure(
+    SOURCE_PATH "${SOURCE_PATH}"
+    OPTIONS
+        ${FEATURE_OPTIONS}
+        -DBUILD_PROGRAMS=OFF
+        -DBUILD_EXAMPLES=OFF
+        -DBUILD_DOCS=OFF
+        -DBUILD_TESTING=OFF
+        -DINSTALL_MANPAGES=OFF
+)
+
+vcpkg_cmake_install()
+
+vcpkg_cmake_config_fixup(PACKAGE_NAME FLAC CONFIG_PATH lib/cmake/FLAC)
+
+vcpkg_copy_pdbs()
+
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/include")
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/share")
+file(REMOVE "${CURRENT_PACKAGES_DIR}/share/LICENSE")
+
+if(VCPKG_LIBRARY_LINKAGE STREQUAL "dynamic")
+    vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/include/FLAC/export.h"
+        "#if defined(FLAC__NO_DLL)"
+        "#if 0"
+    )
+    vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/include/FLAC++/export.h"
+        "#if defined(FLAC__NO_DLL)"
+        "#if 0"
+    )
+else()
+    vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/include/FLAC/export.h"
+        "#if defined(FLAC__NO_DLL)"
+        "#if 1"
+    )
+    vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/include/FLAC++/export.h"
+        "#if defined(FLAC__NO_DLL)"
+        "#if 1"
+    )
+endif()
+
+if(VCPKG_TARGET_IS_WINDOWS)
+    vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/lib/pkgconfig/flac.pc" " -lm" "")
+
+    if(EXISTS "${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig/flac.pc")
+        vcpkg_replace_string("${CURRENT_PACKAGES_DIR}/debug/lib/pkgconfig/flac.pc" " -lm" "")
+    endif()
+endif()
+
+vcpkg_fixup_pkgconfig()
+
+# This license (BSD) is relevant only for library - if someone would want to install
+# FLAC cmd line tools as well additional license (GPL) should be included
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/COPYING.Xiph")
+
+file(INSTALL "${CMAKE_CURRENT_LIST_DIR}/usage" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}")

Tools/CMake/vcpkg/ports/libflac/usage

@@ -0,0 +1,8 @@
+The package libflac provides CMake targets:
+
+    find_package(FLAC CONFIG REQUIRED)
+    target_link_libraries(main PRIVATE FLAC::FLAC)
+    
+    # Or use the C++ API
+    find_package(FLAC CONFIG REQUIRED)
+    target_link_libraries(main PRIVATE FLAC::FLAC++)

Tools/CMake/vcpkg/ports/libflac/vcpkg.json

@@ -0,0 +1,37 @@
+{
+  "name": "libflac",
+  "version": "1.5.0",
+  "description": "Library for manipulating FLAC files",
+  "homepage": "https://xiph.org/flac/",
+  "license": "BSD-3-Clause",
+  "dependencies": [
+    "libogg",
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    },
+    {
+      "name": "vcpkg-cmake-config",
+      "host": true
+    }
+  ],
+  "default-features": [
+    {
+      "name": "stack-protector",
+      "platform": "!emscripten"
+    }
+  ],
+  "features": {
+    "asm": {
+      "description": "Use any assembly optimization routines",
+      "supports": "x86"
+    },
+    "multithreading": {
+      "description": "Enable multithreading if pthreads is available"
+    },
+    "stack-protector": {
+      "description": "Build with stack smashing protection",
+      "supports": "!emscripten"
+    }
+  }
+}