[cmake, docs] Reorganize CMakeModules directory and add GentooCross toolchain (#4088)

Lightly inspired by my earlier toolchain and writeup from the PowerPC
PR.

Closes #3793

Signed-off-by: crueter <crueter@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4088
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

1 files changed, 0 insertions, 198 deletions

diff --git a/CMakeModules/FindFFmpeg.cmake b/CMakeModules/FindFFmpeg.cmake
deleted file mode 100644
index edd0e0a882..0000000000
--- a/CMakeModules/FindFFmpeg.cmake
+++ /dev/null
@@ -1,198 +0,0 @@
-# SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-# SPDX-FileCopyrightText: 2019 Citra Emulator Project
-# SPDX-License-Identifier: GPL-2.0-or-later
-
-# FindFFmpeg
-# ----------
-#
-# Find the native FFmpeg includes and libraries
-#
-# This module defines the following variables:
-#
-#  FFmpeg_INCLUDE_<component>: where to find <component>.h
-#  FFmpeg_LIBRARY_<component>: where to find the <component> library
-#  FFmpeg_INCLUDE_DIR: aggregate all the include paths
-#  FFmpeg_LIBRARIES: aggregate all the paths to the libraries
-#  FFmpeg_FOUND: True if all components have been found
-#
-# This module defines the following targets, which are preferred over variables:
-#
-#  FFmpeg::<component>: Target to use <component> directly, with include path,
-#    library and dependencies set up. If you are using a static build, you are
-#    responsible for adding any external dependencies (such as zlib, bzlib...).
-#
-# <component> can be one of:
-#   avcodec
-#   avdevice
-#   avfilter
-#   avformat
-#   avutil
-#   postproc
-#   swresample
-#   swscale
-#
-
-set(_FFmpeg_ALL_COMPONENTS
-    avcodec
-    avdevice
-    avfilter
-    avformat
-    avutil
-    postproc
-    swresample
-    swscale
-)
-
-set(_FFmpeg_DEPS_avcodec avutil)
-set(_FFmpeg_DEPS_avdevice avcodec avformat avutil)
-set(_FFmpeg_DEPS_avfilter avutil)
-set(_FFmpeg_DEPS_avformat avcodec avutil)
-set(_FFmpeg_DEPS_postproc avutil)
-set(_FFmpeg_DEPS_swresample avutil)
-set(_FFmpeg_DEPS_swscale avutil)
-
-function(find_ffmpeg LIBNAME)
-  if(DEFINED ENV{FFMPEG_DIR})
-    set(FFMPEG_DIR $ENV{FFMPEG_DIR})
-  endif()
-
-  if(FFMPEG_DIR)
-    list(APPEND INCLUDE_PATHS
-      ${FFMPEG_DIR}
-      ${FFMPEG_DIR}/ffmpeg
-      ${FFMPEG_DIR}/lib${LIBNAME}
-      ${FFMPEG_DIR}/include/lib${LIBNAME}
-      ${FFMPEG_DIR}/include/ffmpeg
-      ${FFMPEG_DIR}/include
-      NO_DEFAULT_PATH
-      NO_CMAKE_FIND_ROOT_PATH
-    )
-    list(APPEND LIB_PATHS
-      ${FFMPEG_DIR}
-      ${FFMPEG_DIR}/lib
-      ${FFMPEG_DIR}/lib${LIBNAME}
-      NO_DEFAULT_PATH
-      NO_CMAKE_FIND_ROOT_PATH
-    )
-  else()
-    list(APPEND INCLUDE_PATHS
-      ${CMAKE_SYSROOT}/usr/local/include/ffmpeg
-      ${CMAKE_SYSROOT}/usr/local/include/lib${LIBNAME}
-      ${CMAKE_SYSROOT}/usr/include/ffmpeg
-      ${CMAKE_SYSROOT}/usr/include/lib${LIBNAME}
-      ${CMAKE_SYSROOT}/usr/include/ffmpeg/lib${LIBNAME}
-    )
-
-    list(APPEND LIB_PATHS
-      ${CMAKE_SYSROOT}/usr/local/lib
-      ${CMAKE_SYSROOT}/usr/lib
-    )
-  endif()
-
-  find_path(FFmpeg_INCLUDE_${LIBNAME} lib${LIBNAME}/${LIBNAME}.h
-    HINTS ${INCLUDE_PATHS}
-  )
-
-  find_library(FFmpeg_LIBRARY_${LIBNAME} ${LIBNAME}
-    HINTS ${LIB_PATHS}
-  )
-
-  if(NOT FFMPEG_DIR AND (NOT FFmpeg_LIBRARY_${LIBNAME} OR NOT FFmpeg_INCLUDE_${LIBNAME}))
-    # Didn't find it in the usual paths, try pkg-config
-    find_package(PkgConfig QUIET)
-    pkg_check_modules(FFmpeg_PKGCONFIG_${LIBNAME} QUIET lib${LIBNAME})
-
-    find_path(FFmpeg_INCLUDE_${LIBNAME} lib${LIBNAME}/${LIBNAME}.h
-      ${FFmpeg_PKGCONFIG_${LIBNAME}_INCLUDE_DIRS}
-    )
-
-    find_library(FFmpeg_LIBRARY_${LIBNAME} ${LIBNAME}
-      ${FFmpeg_PKGCONFIG_${LIBNAME}_LIBRARY_DIRS}
-    )
-  endif()
-
-  if(FFmpeg_INCLUDE_${LIBNAME} AND FFmpeg_LIBRARY_${LIBNAME})
-    set(FFmpeg_INCLUDE_${LIBNAME} "${FFmpeg_INCLUDE_${LIBNAME}}" PARENT_SCOPE)
-    set(FFmpeg_LIBRARY_${LIBNAME} "${FFmpeg_LIBRARY_${LIBNAME}}" PARENT_SCOPE)
-
-    # Extract FFmpeg version from version.h
-    foreach(v MAJOR MINOR MICRO)
-      set(FFmpeg_${LIBNAME}_VERSION_${v} 0)
-    endforeach()
-    string(TOUPPER ${LIBNAME} LIBNAME_UPPER)
-    file(STRINGS "${FFmpeg_INCLUDE_${LIBNAME}}/lib${LIBNAME}/version.h" _FFmpeg_VERSION_H_CONTENTS REGEX "#define LIB${LIBNAME_UPPER}_VERSION_(MAJOR|MINOR|MICRO) ")
-    set(_FFmpeg_VERSION_REGEX "([0-9]+)")
-    foreach(v MAJOR MINOR MICRO)
-      if("${_FFmpeg_VERSION_H_CONTENTS}" MATCHES "#define LIB${LIBNAME_UPPER}_VERSION_${v}[\\t ]+${_FFmpeg_VERSION_REGEX}")
-        set(FFmpeg_${LIBNAME}_VERSION_${v} "${CMAKE_MATCH_1}")
-      endif()
-    endforeach()
-    set(FFmpeg_${LIBNAME}_VERSION "${FFmpeg_${LIBNAME}_VERSION_MAJOR}.${FFmpeg_${LIBNAME}_VERSION_MINOR}.${FFmpeg_${LIBNAME}_VERSION_MICRO}")
-    set(FFmpeg_${c}_VERSION "${FFmpeg_${LIBNAME}_VERSION}" PARENT_SCOPE)
-    unset(_FFmpeg_VERSION_REGEX)
-    unset(_FFmpeg_VERSION_H_CONTENTS)
-
-    set(FFmpeg_${c}_FOUND TRUE PARENT_SCOPE)
-    if(NOT FFmpeg_FIND_QUIETLY)
-      message("--  Found ${LIBNAME}: ${FFmpeg_INCLUDE_${LIBNAME}} ${FFmpeg_LIBRARY_${LIBNAME}} (version: ${FFmpeg_${LIBNAME}_VERSION})")
-    endif()
-  endif()
-endfunction()
-
-foreach(c ${_FFmpeg_ALL_COMPONENTS})
-  find_ffmpeg(${c})
-endforeach()
-
-foreach(c ${_FFmpeg_ALL_COMPONENTS})
-  if(FFmpeg_${c}_FOUND)
-    list(APPEND FFmpeg_INCLUDE_DIR ${FFmpeg_INCLUDE_${c}})
-    list(APPEND FFmpeg_LIBRARIES ${FFmpeg_LIBRARY_${c}})
-
-    add_library(FFmpeg::${c} IMPORTED UNKNOWN)
-    set_target_properties(FFmpeg::${c} PROPERTIES
-      IMPORTED_LOCATION ${FFmpeg_LIBRARY_${c}}
-      INTERFACE_INCLUDE_DIRECTORIES ${FFmpeg_INCLUDE_${c}}
-    )
-    if(_FFmpeg_DEPS_${c})
-      set(deps)
-      foreach(dep ${_FFmpeg_DEPS_${c}})
-        list(APPEND deps FFmpeg::${dep})
-      endforeach()
-
-      set_target_properties(FFmpeg::${c} PROPERTIES
-        INTERFACE_LINK_LIBRARIES "${deps}"
-      )
-      unset(deps)
-    endif()
-  endif()
-endforeach()
-
-if(FFmpeg_INCLUDE_DIR)
-  list(REMOVE_DUPLICATES FFmpeg_INCLUDE_DIR)
-endif()
-
-foreach(c ${FFmpeg_FIND_COMPONENTS})
-  list(APPEND _FFmpeg_REQUIRED_VARS FFmpeg_INCLUDE_${c} FFmpeg_LIBRARY_${c})
-endforeach()
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(FFmpeg
-  REQUIRED_VARS ${_FFmpeg_REQUIRED_VARS}
-  HANDLE_COMPONENTS
-)
-
-foreach(c ${_FFmpeg_ALL_COMPONENTS})
-  unset(_FFmpeg_DEPS_${c})
-endforeach()
-unset(_FFmpeg_ALL_COMPONENTS)
-unset(_FFmpeg_REQUIRED_VARS)
-
-include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(FFmpeg
-  REQUIRED_VARS
-    FFmpeg_LIBRARIES
-    FFmpeg_INCLUDE_DIR
-  HANDLE_COMPONENTS
-)