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Ffmpeg generalize cmake #4033

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Ffmpeg generalize cmake #4033

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8108946
generalize ffmpeg cmake for linux distros
stmcgovern Aug 11, 2025
0ec7ae4
fix: use list instead of string
stmcgovern Aug 11, 2025
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25 changes: 16 additions & 9 deletions third_party/ffmpeg/single/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -3,29 +3,36 @@
message(STATUS "Searching existing FFmpeg installation")
message(STATUS FFMPEG_ROOT=$ENV{FFMPEG_ROOT})
if (NOT DEFINED ENV{FFMPEG_ROOT})
message(FATAL_ERROR "Environment variable FFMPEG_ROOT is not set.")
message(STATUS "FFMPEG_ROOT not set, will search system paths")
endif()

# Maintain FFMPEG_ROOT approach and add common system paths
set(_root $ENV{FFMPEG_ROOT})
set(lib_dirs "${_root}/lib" "${_root}/bin")
set(include_dir "${_root}/include")
set(lib_dirs "${_root}/lib" "${_root}/bin" "/usr/lib64" "/usr/lib" "/usr/local/lib64" "/usr/local/lib")
set(include_dir "${_root}/include" "/usr/include/ffmpeg" "/usr/include" "/usr/local/include")

# Add multiarch paths for Debian/Ubuntu
execute_process(COMMAND gcc -print-multiarch OUTPUT_VARIABLE MULTIARCH_TRIPLET
OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET)
if(MULTIARCH_TRIPLET)
list(APPEND lib_dirs "/usr/lib/${MULTIARCH_TRIPLET}")
list(APPEND include_dir "/usr/include/${MULTIARCH_TRIPLET}")
endif()

add_library(ffmpeg INTERFACE)
target_include_directories(ffmpeg INTERFACE "${include_dir}")
target_include_directories(ffmpeg INTERFACE ${include_dir})

function (_find_ffmpeg_lib component)
find_path("${component}_header"
NAMES "lib${component}/${component}.h"
PATHS "${include_dir}"
PATHS ${include_dir}
DOC "The include directory for ${component}"
REQUIRED
NO_DEFAULT_PATH)
REQUIRED)
find_library("lib${component}"
NAMES "${component}"
PATHS ${lib_dirs}
DOC "${component} library"
REQUIRED
NO_DEFAULT_PATH)
REQUIRED)
message(STATUS "Found ${component}: ${lib${component}}")
target_link_libraries(
ffmpeg
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