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[cmake,ffmpeg] fix version detection

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If not detected by pkg-config fall back on header file parsing to
extract the version of the FFmpeg component.
This commit is contained in:
akallabeth 2024-09-24 08:42:37 +02:00
parent 5380a743b5
commit c766c13103
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1 changed files with 41 additions and 1 deletions
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42
cmake/FindFFmpeg.cmake
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@ -35,6 +35,7 @@
# SPDX-FileCopyrightText: 2008 Alexander Neundorf <neundorf@kde.org>
# SPDX-FileCopyrightText: 2011 Michael Jansen <kde@michael-jansen.biz>
# SPDX-FileCopyrightText: 2021 Stefan Brüns <stefan.bruens@rwth-aachen.de>
# SPDX-FileCopyrightText: 2024 Armin Novak <anovak@thincast.com>
# SPDX-License-Identifier: BSD-3-Clause
include(FindPackageHandleStandardArgs)
@ -101,7 +102,46 @@ macro(find_component _component _pkgconfig _library _header)
)
set(${_component}_DEFINITIONS ${PC_${_component}_CFLAGS_OTHER} CACHE STRING "The ${_component} CFLAGS.")
set(${_component}_VERSION ${PC_${_component}_VERSION} CACHE STRING "The ${_component} version number.")
# Fallback version detection:
# Read version.h (and version_major.h if it exists) and try to extract the version
if ("${PC_${_component}_VERSION}_" STREQUAL "_")
get_filename_component(${_component}_suffix
"${_header}"
DIRECTORY
)
find_file(${_component}_hdr_version_major
NAMES version_major.h
PATH_SUFFIXES ${${_component}_suffix}
HINTS
${${_component}_INCLUDE_DIRS}
)
find_file(${_component}_hdr_version
NAMES version.h
PATH_SUFFIXES ${${_component}_suffix}
HINTS
${${_component}_INCLUDE_DIRS}
)
if (NOT ${${_component}_hdr_version} MATCHES ".*-NOTFOUND")
file(READ "${${_component}_hdr_version}" ${_component}_version_text)
endif()
if (NOT ${${_component}_hdr_version_major} MATCHES ".*-NOTFOUND")
file(READ "${${_component}_hdr_version_major}" ${_component}_version_major_text)
else()
set(${_component}_version_major_text "${${_component}_version_text}")
endif()
string(REGEX MATCH "#define[ \t]+.*_VERSION_MAJOR[ \t]+([0-9]+)" _ "${${_component}_version_major_text}")
set(${_component}_version_major ${CMAKE_MATCH_1})
string(REGEX MATCH "#define[ \t]+.*_VERSION_MINOR[ \t]+([0-9]+)" _ "${${_component}_version_text}")
set(${_component}_version_minor ${CMAKE_MATCH_1})
string(REGEX MATCH "#define[ \t]+.*_VERSION_MICRO[ \t]+([0-9]+)" _ "${${_component}_version_text}")
set(${_component}_version_micro ${CMAKE_MATCH_1})
set(${_component}_VERSION "${${_component}_version_major}.${${_component}_version_minor}.${${_component}_version_micro}" CACHE STRING "The ${_component} version number.")
else()
set(${_component}_VERSION ${PC_${_component}_VERSION} CACHE STRING "The ${_component} version number.")
endif()
set_component_found(${_component})