CMake/Modules/FindSDL_mixer.cmake

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Simplify CMake per-source license notices Per-source copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong. Precise contributor information is already maintained automatically by the version control tool. Ultimately it is the receiver of a file who is responsible for determining its licensing status, and per-source notices are merely a convenience. Therefore it is simpler and more accurate for each source to have a generic notice of the license name and references to more detailed information on copyright holders and full license terms. Our `Copyright.txt` file now contains a list of Contributors whose names appeared source-level copyright notices. It also references version control history for more precise information. Therefore we no longer need to spell out the list of Contributors in each source file notice. Replace CMake per-source copyright/license notice headers with a short description of the license and links to `Copyright.txt` and online information available from "https://cmake.org/licensing". The online URL also handles cases of modules being copied out of our source into other projects, so we can drop our notices about replacing links with full license text. Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority of the replacements mechanically. Manually fix up shebang lines and trailing newlines in a few files. Manually update the notices in a few files that the script does not handle.
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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindSDL_mixer
# -------------
#
# Locate SDL_mixer library
#
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# This module defines:
#
# ::
#
# SDL_MIXER_LIBRARIES, the name of the library to link against
# SDL_MIXER_INCLUDE_DIRS, where to find the headers
# SDL_MIXER_FOUND, if false, do not try to link against
# SDL_MIXER_VERSION_STRING - human-readable string containing the
# version of SDL_mixer
#
#
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#
# For backward compatibility the following variables are also set:
#
# ::
#
# SDLMIXER_LIBRARY (same value as SDL_MIXER_LIBRARIES)
# SDLMIXER_INCLUDE_DIR (same value as SDL_MIXER_INCLUDE_DIRS)
# SDLMIXER_FOUND (same value as SDL_MIXER_FOUND)
#
#
#
# $SDLDIR is an environment variable that would correspond to the
# ./configure --prefix=$SDLDIR used in building SDL.
#
# Created by Eric Wing. This was influenced by the FindSDL.cmake
# module, but with modifications to recognize OS X frameworks and
# additional Unix paths (FreeBSD, etc).
if(NOT SDL_MIXER_INCLUDE_DIR AND SDLMIXER_INCLUDE_DIR)
set(SDL_MIXER_INCLUDE_DIR ${SDLMIXER_INCLUDE_DIR} CACHE PATH "directory cache
entry initialized from old variable name")
endif()
find_path(SDL_MIXER_INCLUDE_DIR SDL_mixer.h
HINTS
ENV SDLMIXERDIR
ENV SDLDIR
PATH_SUFFIXES SDL
# path suffixes to search inside ENV{SDLDIR}
include/SDL include/SDL12 include/SDL11 include
)
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if(CMAKE_SIZEOF_VOID_P EQUAL 8)
set(VC_LIB_PATH_SUFFIX lib/x64)
else()
set(VC_LIB_PATH_SUFFIX lib/x86)
endif()
if(NOT SDL_MIXER_LIBRARY AND SDLMIXER_LIBRARY)
set(SDL_MIXER_LIBRARY ${SDLMIXER_LIBRARY} CACHE FILEPATH "file cache entry
initialized from old variable name")
endif()
find_library(SDL_MIXER_LIBRARY
NAMES SDL_mixer
HINTS
ENV SDLMIXERDIR
ENV SDLDIR
PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX}
)
if(SDL_MIXER_INCLUDE_DIR AND EXISTS "${SDL_MIXER_INCLUDE_DIR}/SDL_mixer.h")
file(STRINGS "${SDL_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL_MIXER_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+[0-9]+$")
file(STRINGS "${SDL_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL_MIXER_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+[0-9]+$")
file(STRINGS "${SDL_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL_MIXER_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+[0-9]+$")
string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL_MIXER_VERSION_MAJOR "${SDL_MIXER_VERSION_MAJOR_LINE}")
string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL_MIXER_VERSION_MINOR "${SDL_MIXER_VERSION_MINOR_LINE}")
string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL_MIXER_VERSION_PATCH "${SDL_MIXER_VERSION_PATCH_LINE}")
set(SDL_MIXER_VERSION_STRING ${SDL_MIXER_VERSION_MAJOR}.${SDL_MIXER_VERSION_MINOR}.${SDL_MIXER_VERSION_PATCH})
unset(SDL_MIXER_VERSION_MAJOR_LINE)
unset(SDL_MIXER_VERSION_MINOR_LINE)
unset(SDL_MIXER_VERSION_PATCH_LINE)
unset(SDL_MIXER_VERSION_MAJOR)
unset(SDL_MIXER_VERSION_MINOR)
unset(SDL_MIXER_VERSION_PATCH)
endif()
set(SDL_MIXER_LIBRARIES ${SDL_MIXER_LIBRARY})
set(SDL_MIXER_INCLUDE_DIRS ${SDL_MIXER_INCLUDE_DIR})
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL_mixer
REQUIRED_VARS SDL_MIXER_LIBRARIES SDL_MIXER_INCLUDE_DIRS
VERSION_VAR SDL_MIXER_VERSION_STRING)
# for backward compatibility
set(SDLMIXER_LIBRARY ${SDL_MIXER_LIBRARIES})
set(SDLMIXER_INCLUDE_DIR ${SDL_MIXER_INCLUDE_DIRS})
set(SDLMIXER_FOUND ${SDL_MIXER_FOUND})
mark_as_advanced(SDL_MIXER_LIBRARY SDL_MIXER_INCLUDE_DIR)