CMake构建带Vorbis(OGG)支持的静态libsndfile失败求助

我尝试在项目中通过CMake引入libogg、libvorbis和libsndfile以播放OGG文件，但构建后libsndfile始终没有Vorbis支持。以下是我的CMake配置代码：

# Fetch libogg
FetchContent_Declare(
    libogg
    GIT_REPOSITORY https://github.com/xiph/ogg.git
    GIT_TAG v1.3.5
)
FetchContent_MakeAvailable(libogg)

# Fetch libvorbis
FetchContent_Declare(
    libvorbis
    GIT_REPOSITORY https://github.com/xiph/vorbis.git
    GIT_TAG v1.3.7
)
SET(OGG_INCLUDE_DIR ${libogg_BUILD_DIR}/include)
SET(OGG_LIBRARY ${libogg_BUILD_DIR}/libogg.a)
FetchContent_MakeAvailable(libvorbis)

# Fetch libsndfile
FetchContent_Declare(
  libsndfile
  GIT_REPOSITORY https://github.com/libsndfile/libsndfile.git
  GIT_TAG        1.2.0 # Replace with the version you need
)
SET(BUILD_SHARED_LIBS OFF CACHE BOOL "Build shared libraries" FORCE)
SET(Vorbis_Vorbis_LIBRARY ${libvorbis_BINARY_DIR}/lib/libvorbis.a)
SET(Vorbis_Vorbis_INCLUDE_DIR ${libvorbis_SOURCE_DIR}/include)

FetchContent_MakeAvailable(libsndfile)

运行cmake ..后的输出显示libsndfile未找到Vorbis：

-- 
CMake Deprecation Warning at build/_deps/libogg-src/CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- Configuring libogg 1.3.5
CMake Deprecation Warning at build/_deps/libvorbis-src/CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- Configuring vorbis 1.3.7
-- Found Ogg: /libogg.a
CMake Deprecation Warning at build/_deps/libsndfile-src/CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


CMake Deprecation Warning at build/_deps/libsndfile-src/CMakeLists.txt:14 (cmake_policy):
  The OLD behavior for policy CMP0091 will be removed from a future version of
  CMake.

  The cmake-policies(7) manual explains that the OLD behaviors of all policies are deprecated and that a policy should be set to OLD only under specific short-term circumstances. Projects should be ported to the NEW behavior and not rely on setting a policy to OLD.


-- Could NOT find ALSA (missing: ALSA_LIBRARY ALSA_INCLUDE_DIR) 
-- Found Ogg: /libogg.a (Required is at least version "1.3")
-- Could NOT find FLAC (missing: FLAC_LIBRARY FLAC_INCLUDE_DIR) 
-- Could NOT find Opus (missing: OPUS_LIBRARY OPUS_INCLUDE_DIR) 
-- Could NOT find mp3lame (missing: MP3LAME_LIBRARY MP3LAME_INCLUDE_DIR) 
-- Could NOT find Mpg123 (missing: MPG123_LIBRARY MPG123_INCLUDE_DIR) (Required is at least version "1.25.10")
-- Could NOT find Speex (missing: SPEEX_LIBRARY SPEEX_INCLUDE_DIR) 
-- The following features have been enabled:

 * INSTALL_PKGCONFIG_MODULE, generate and install pkg-config module
 * INSTALL_MANPAGES, install man pages for programs

-- The following OPTIONAL packages have been found:

 * LibUSB
 * Nettle (required version >= 3.0)
 * GnuTLS
 * OpenSSL
 * BZip2
 * LibLZMA (required version >= 5.2)
 * zstd (required version >= 1.3.6)
 * SQLite3, light weight SQL database engine., <www.sqlite.org/>
   Enables regtest

-- The following REQUIRED packages have been found:

 * ZLIB
 * Ogg, library for manipulating ogg bitstreams, <www.xiph.org/ogg/>
   Required to enable Vorbis, Speex, and Opus support

-- The following features have been disabled:

 * BUILD_SHARED_LIBS, build shared libraries
 * ENABLE_EXTERNAL_LIBS, enable FLAC, Vorbis, and Opus codecs
 * ENABLE_MPEG, enable MPEG audio (including mp3) codecs
 * ENABLE_EXPERIMENTAL, enable experimental code
 * BUILD_TESTING, build tests
 * BUILD_REGTEST, build regtest
 * ENABLE_CPACK, enable CPack support
 * ENABLE_CPU_CLIP, Enable tricky cpu specific clipper
 * ENABLE_BOW_DOCS, enable black-on-white html docs
 * ENABLE_PACKAGE_CONFIG, generate and install package config file

-- The following OPTIONAL packages have not been found:

 * webp
 * MbedTLS (required version >= 1.0)
 * PulseAudio
 * OSS
 * AudioIO
 * JACK
 * OpenSL
 * PortAudio
 * MySOFA
 * SndFile
 * ALSA
 * Mpg123 (required version >= 1.25.10)
 * Speex, an audio codec tuned for speech, <www.speex.org/>
   Enables experemental Speex support

-- The following RECOMMENDED packages have not been found:

 * Vorbis, open source lossy audio codec, <www.vorbis.com/>
   Enables Vorbis support
 * FLAC, Free Lossless Audio Codec Library, <www.xiph.org/flac/>
   Enables FLAC support
 * Opus, Standardized open source low-latency fullband codec, <www.opus-codec.org/>
   Enables experimental Opus support
 * mp3lame, High quality MPEG Audio Layer III (MP3) encoder, <https://lame.sourceforge.io/>
   Enables MPEG layer III (MP3) writing support

请问配置哪里出错了？

你的配置存在三个关键问题：

1. 未启用外部编解码器开关
   libsndfile默认关闭ENABLE_EXTERNAL_LIBS选项，这个开关是启用Vorbis、FLAC等第三方编解码器的前提，必须显式开启。

2. Vorbis变量名称错误
   libsndfile查找Vorbis时使用的变量是VORBIS_LIBRARY、VORBISFILE_LIBRARY和VORBIS_INCLUDE_DIR，而非你设置的Vorbis_Vorbis_LIBRARY格式。其中libvorbisfile是Vorbis文件处理必需的库，不能遗漏。

3. 库路径引用可能不准确
   需要确保引用的libvorbis静态库路径正确，通常构建后libvorbis.a和libvorbisfile.a会生成在libvorbis_BINARY_DIR的lib子目录下。

修正后的CMake配置代码如下：

# Fetch libogg
FetchContent_Declare(
    libogg
    GIT_REPOSITORY https://github.com/xiph/ogg.git
    GIT_TAG v1.3.5
)
FetchContent_MakeAvailable(libogg)

# Fetch libvorbis
FetchContent_Declare(
    libvorbis
    GIT_REPOSITORY https://github.com/xiph/vorbis.git
    GIT_TAG v1.3.7
)
# 传递libogg的路径给libvorbis
SET(OGG_INCLUDE_DIR ${libogg_SOURCE_DIR}/include)
SET(OGG_LIBRARY ${libogg_BINARY_DIR}/libogg.a)
FetchContent_MakeAvailable(libvorbis)

# Fetch libsndfile
FetchContent_Declare(
  libsndfile
  GIT_REPOSITORY https://github.com/libsndfile/libsndfile.git
  GIT_TAG        1.2.0 # Replace with the version you need
)
# 强制静态库构建
SET(BUILD_SHARED_LIBS OFF CACHE BOOL "Build shared libraries" FORCE)
# 启用外部编解码器支持
SET(ENABLE_EXTERNAL_LIBS ON CACHE BOOL "Enable FLAC, Vorbis, Opus codecs" FORCE)
# 设置Vorbis相关路径
SET(VORBIS_LIBRARY ${libvorbis_BINARY_DIR}/lib/libvorbis.a)
SET(VORBISFILE_LIBRARY ${libvorbis_BINARY_DIR}/lib/libvorbisfile.a)
SET(VORBIS_INCLUDE_DIR ${libvorbis_SOURCE_DIR}/include)
# 传递libogg路径给libsndfile
SET(OGG_LIBRARY ${libogg_BINARY_DIR}/libogg.a)
SET(OGG_INCLUDE_DIR ${libogg_SOURCE_DIR}/include)

FetchContent_MakeAvailable(libsndfile)

重新运行CMake后，你应该会看到libsndfile检测到Vorbis支持的日志，并且ENABLE_EXTERNAL_LIBS会被标记为启用状态。

内容的提问来源于stack exchange，提问作者Justin808