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CMake/Modules/FindPNG.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copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong.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.
2016-09-27 19:01:08 +00:00
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
Convert builtin help to reStructuredText source files Run the convert-help.bash script to convert documentation: ./convert-help.bash "/path/to/CMake-build/bin" Then remove it.
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#.rst:
# FindPNG
# -------
#
FindPNG: Create an imported PNG::PNG target (#15911) Imported targets are now the recommended way of dealing with external library dependencies. Add one for FindPNG and update documentation accordingly. Also add a test case activated by CMake_TEST_FindPNG.
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# Find libpng, the official reference library for the PNG image format.
Convert builtin help to reStructuredText source files Run the convert-help.bash script to convert documentation: ./convert-help.bash "/path/to/CMake-build/bin" Then remove it.
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#
FindPNG: Create an imported PNG::PNG target (#15911) Imported targets are now the recommended way of dealing with external library dependencies. Add one for FindPNG and update documentation accordingly. Also add a test case activated by CMake_TEST_FindPNG.
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# Imported targets
# ^^^^^^^^^^^^^^^^
Convert builtin help to reStructuredText source files Run the convert-help.bash script to convert documentation: ./convert-help.bash "/path/to/CMake-build/bin" Then remove it.
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#
FindPNG: Create an imported PNG::PNG target (#15911) Imported targets are now the recommended way of dealing with external library dependencies. Add one for FindPNG and update documentation accordingly. Also add a test case activated by CMake_TEST_FindPNG.
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# This module defines the following :prop_tgt:`IMPORTED` target:
Adding Zlib and PNG find modules in the new format
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#
FindPNG: Create an imported PNG::PNG target (#15911) Imported targets are now the recommended way of dealing with external library dependencies. Add one for FindPNG and update documentation accordingly. Also add a test case activated by CMake_TEST_FindPNG.
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# ``PNG::PNG``
# The libpng library, if found.
FindPNG: provide PNG_INCLUDE_DIRS, as the readme.txt says (#11312) Also improve the documentation a bit. Alex
2011-11-18 18:20:07 +00:00
#
FindPNG: Create an imported PNG::PNG target (#15911) Imported targets are now the recommended way of dealing with external library dependencies. Add one for FindPNG and update documentation accordingly. Also add a test case activated by CMake_TEST_FindPNG.
2016-01-19 17:43:05 +00:00
# Result variables
# ^^^^^^^^^^^^^^^^
#
# This module will set the following variables in your project:
Convert builtin help to reStructuredText source files Run the convert-help.bash script to convert documentation: ./convert-help.bash "/path/to/CMake-build/bin" Then remove it.
2013-10-15 15:17:36 +00:00
#
Modules: Format documentation to avoid over-long preformatted lines Convert several preformatted code block literals that enumerate lists of options or variables to use reST definition lists instead. Manually wrap other long lines in code blocks.
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# ``PNG_INCLUDE_DIRS``
# where to find png.h, etc.
# ``PNG_LIBRARIES``
# the libraries to link against to use PNG.
# ``PNG_DEFINITIONS``
FindPNG: Fix small typo fix in module help
2016-12-14 21:09:49 +00:00
# You should add_definitions(${PNG_DEFINITIONS}) before compiling code
Modules: Format documentation to avoid over-long preformatted lines Convert several preformatted code block literals that enumerate lists of options or variables to use reST definition lists instead. Manually wrap other long lines in code blocks.
2014-10-22 19:52:31 +00:00
# that includes png library files.
# ``PNG_FOUND``
# If false, do not try to use PNG.
# ``PNG_VERSION_STRING``
# the version of the PNG library found (since CMake 2.8.8)
Convert builtin help to reStructuredText source files Run the convert-help.bash script to convert documentation: ./convert-help.bash "/path/to/CMake-build/bin" Then remove it.
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#
FindPNG: Create an imported PNG::PNG target (#15911) Imported targets are now the recommended way of dealing with external library dependencies. Add one for FindPNG and update documentation accordingly. Also add a test case activated by CMake_TEST_FindPNG.
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# Obsolete variables
# ^^^^^^^^^^^^^^^^^^
#
# The following variables may also be set, for backwards compatibility:
FindPNG: provide PNG_INCLUDE_DIRS, as the readme.txt says (#11312) Also improve the documentation a bit. Alex
2011-11-18 18:20:07 +00:00
#
Modules: Format documentation to avoid over-long preformatted lines Convert several preformatted code block literals that enumerate lists of options or variables to use reST definition lists instead. Manually wrap other long lines in code blocks.
2014-10-22 19:52:31 +00:00
# ``PNG_LIBRARY``
# where to find the PNG library.
FindPNG: Create an imported PNG::PNG target (#15911) Imported targets are now the recommended way of dealing with external library dependencies. Add one for FindPNG and update documentation accordingly. Also add a test case activated by CMake_TEST_FindPNG.
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# ``PNG_INCLUDE_DIR``
# where to find the PNG headers (same as PNG_INCLUDE_DIRS)
Convert builtin help to reStructuredText source files Run the convert-help.bash script to convert documentation: ./convert-help.bash "/path/to/CMake-build/bin" Then remove it.
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#
# Since PNG depends on the ZLib compression library, none of the above
# will be defined unless ZLib can be found.
fix #9152: find ZLIB quietly if PNG is searched QUIETLY Alex
2009-09-14 19:53:07 +00:00
if(PNG_FIND_QUIETLY)
set(_FIND_ZLIB_ARG QUIET)
Remove CMake-language block-end command arguments Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style. Run the following shell code: for c in else endif endforeach endfunction endmacro endwhile; do echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | egrep -z -v 'Tests/CMakeTests/While-Endwhile-' | xargs -0 sed -i -f convert.sed && rm convert.sed
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endif()
fix #9152: find ZLIB quietly if PNG is searched QUIETLY Alex
2009-09-14 19:53:07 +00:00
find_package(ZLIB ${_FIND_ZLIB_ARG})
Adding Zlib and PNG find modules in the new format
2002-09-02 18:08:30 +00:00
ENH: just converted case to lower for the book
2009-07-21 16:45:37 +00:00
if(ZLIB_FOUND)
Modules: Replace coded PATHS with PATH_SUFFIXES Some modules assume that `/usr` and `/usr/local` are the only `CMAKE_PREFIX_PATH` entries and explicitly enumerate all paths instead of using `PATH_SUFFIXES` and relying on the dynamic set of prefix paths. This commit attempts to rectify that behavior.
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find_path(PNG_PNG_INCLUDE_DIR png.h PATH_SUFFIXES include/libpng)
Adding Zlib and PNG find modules in the new format
2002-09-02 18:08:30 +00:00
FindPNG: Add versioned library names for 1.6 (#14289) While at it, refactor the versioned library name list generation to reduce duplication.
2013-07-15 13:51:50 +00:00
list(APPEND PNG_NAMES png libpng)
FindPNG: improve library detection (#14301) -add support for upcoming version 1.7 -improve version selection, use the major and minor of the requested version to generate the library suffix list -support detection of release and debug libraries
2013-07-27 20:35:11 +00:00
unset(PNG_NAMES_DEBUG)
set(_PNG_VERSION_SUFFIXES 17 16 15 14 12)
Clean up usage of if(... MATCHES regex) followed string(REGEX REPLACE regex) The matches have already been calculated and can simply be taken from CMAKE_MATCH_n variables. This avoids multiple compilations of the same or very similar regular expressions.
2014-04-06 19:30:00 +00:00
if (PNG_FIND_VERSION MATCHES "^([0-9]+)\\.([0-9]+)(\\..*)?$")
set(_PNG_VERSION_SUFFIX_MIN "${CMAKE_MATCH_1}${CMAKE_MATCH_2}")
FindPNG: improve library detection (#14301) -add support for upcoming version 1.7 -improve version selection, use the major and minor of the requested version to generate the library suffix list -support detection of release and debug libraries
2013-07-27 20:35:11 +00:00
if (PNG_FIND_VERSION_EXACT)
set(_PNG_VERSION_SUFFIXES ${_PNG_VERSION_SUFFIX_MIN})
else ()
string(REGEX REPLACE
"${_PNG_VERSION_SUFFIX_MIN}.*" "${_PNG_VERSION_SUFFIX_MIN}"
_PNG_VERSION_SUFFIXES "${_PNG_VERSION_SUFFIXES}")
endif ()
unset(_PNG_VERSION_SUFFIX_MIN)
endif ()
foreach(v IN LISTS _PNG_VERSION_SUFFIXES)
list(APPEND PNG_NAMES png${v} libpng${v})
list(APPEND PNG_NAMES_DEBUG png${v}d libpng${v}d)
FindPNG: Add versioned library names for 1.6 (#14289) While at it, refactor the versioned library name list generation to reduce duplication.
2013-07-15 13:51:50 +00:00
endforeach()
FindPNG: improve library detection (#14301) -add support for upcoming version 1.7 -improve version selection, use the major and minor of the requested version to generate the library suffix list -support detection of release and debug libraries
2013-07-27 20:35:11 +00:00
unset(_PNG_VERSION_SUFFIXES)
Fix spelling typos in comments and documentation (#16037) The Debian package checker tool (lintian) detected several typos in CMake.
2016-03-29 18:24:20 +00:00
# For compatibility with versions prior to this multi-config search, honor
FindPNG: Honor old PNG_LIBRARY if provided (#14398) In commit 2a797539 (FindPNG: improve library detection, 2013-07-27) we split the search for PNG into separate PNG_LIBRARY_DEBUG and PNG_LIBRARY_RELEASE variables. However, if a project or user sets the old PNG_LIBRARY value we must honor it instead of searching. While at it, mark PNG_LIBRARY_RELEASE and PNG_LIBRARY_DEBUG as advanced and remove a stray debug message.
2013-09-13 15:52:48 +00:00
# any PNG_LIBRARY that is already specified and skip the search.
if(NOT PNG_LIBRARY)
find_library(PNG_LIBRARY_RELEASE NAMES ${PNG_NAMES})
find_library(PNG_LIBRARY_DEBUG NAMES ${PNG_NAMES_DEBUG})
include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake)
select_library_configurations(PNG)
mark_as_advanced(PNG_LIBRARY_RELEASE PNG_LIBRARY_DEBUG)
endif()
FindPNG: improve library detection (#14301) -add support for upcoming version 1.7 -improve version selection, use the major and minor of the requested version to generate the library suffix list -support detection of release and debug libraries
2013-07-27 20:35:11 +00:00
unset(PNG_NAMES)
unset(PNG_NAMES_DEBUG)
# Set by select_library_configurations(), but we want the one from
# find_package_handle_standard_args() below.
unset(PNG_FOUND)
Adding Zlib and PNG find modules in the new format
2002-09-02 18:08:30 +00:00
ENH: just converted case to lower for the book
2009-07-21 16:45:37 +00:00
if (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR)
Adding Zlib and PNG find modules in the new format
2002-09-02 18:08:30 +00:00
# png.h includes zlib.h. Sigh.
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:47:32 +00:00
set(PNG_INCLUDE_DIRS ${PNG_PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )
Fix spelling typos in comments and documentation (#16037) The Debian package checker tool (lintian) detected several typos in CMake.
2016-03-29 18:24:20 +00:00
set(PNG_INCLUDE_DIR ${PNG_INCLUDE_DIRS} ) # for backward compatibility
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:47:32 +00:00
set(PNG_LIBRARIES ${PNG_LIBRARY} ${ZLIB_LIBRARY})
Adding Zlib and PNG find modules in the new format
2002-09-02 18:08:30 +00:00
ENH: just converted case to lower for the book
2009-07-21 16:45:37 +00:00
if (CYGWIN)
if(BUILD_SHARED_LIBS)
Adding Zlib and PNG find modules in the new format
2002-09-02 18:08:30 +00:00
# No need to define PNG_USE_DLL here, because it's default for Cygwin.
Remove CMake-language block-end command arguments Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style. Run the following shell code: for c in else endif endforeach endfunction endmacro endwhile; do echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | egrep -z -v 'Tests/CMakeTests/While-Endwhile-' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:50:14 +00:00
else()
Convert CMake-language commands to lower case Ancient CMake versions required upper-case commands. Later command names became case-insensitive. Now the preferred style is lower-case. Run the following shell code: cmake --help-command-list | grep -v "cmake version" | while read c; do echo 's/\b'"$(echo $c | tr '[:lower:]' '[:upper:]')"'\(\s*\)(/'"$c"'\1(/g' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:47:32 +00:00
set (PNG_DEFINITIONS -DPNG_STATIC)
Remove CMake-language block-end command arguments Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style. Run the following shell code: for c in else endif endforeach endfunction endmacro endwhile; do echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | egrep -z -v 'Tests/CMakeTests/While-Endwhile-' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:50:14 +00:00
endif()
endif ()
Adding Zlib and PNG find modules in the new format
2002-09-02 18:08:30 +00:00
FindPNG: Create an imported PNG::PNG target (#15911) Imported targets are now the recommended way of dealing with external library dependencies. Add one for FindPNG and update documentation accordingly. Also add a test case activated by CMake_TEST_FindPNG.
2016-01-19 17:43:05 +00:00
if(NOT TARGET PNG::PNG)
add_library(PNG::PNG UNKNOWN IMPORTED)
set_target_properties(PNG::PNG PROPERTIES
INTERFACE_COMPILE_DEFINITIONS "${PNG_DEFINITIONS}"
INTERFACE_INCLUDE_DIRECTORIES "${PNG_INCLUDE_DIRS}"
INTERFACE_LINK_LIBRARIES ZLIB::ZLIB)
if(EXISTS "${PNG_LIBRARY}")
set_target_properties(PNG::PNG PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES "C"
IMPORTED_LOCATION "${PNG_LIBRARY}")
endif()
if(EXISTS "${PNG_LIBRARY_RELEASE}")
set_property(TARGET PNG::PNG APPEND PROPERTY
IMPORTED_CONFIGURATIONS RELEASE)
set_target_properties(PNG::PNG PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES_RELEASE "C"
IMPORTED_LOCATION_RELEASE "${PNG_LIBRARY_RELEASE}")
endif()
Modules: Make imported targets fall back to `Release` Find modules only detect Debug and Release configurations. All other configurations will fall back to the configuration listed as the first entry in `IMPORTED_CONFIGURATIONS`. Switch the order so that `Release` is listed first, as this is a better fallback than `Debug` for the `RelWithDebInfo` and `MinSizeRel` configurations. See issue #16091. This approach is recommended by documentation in `cmake-developer(7)` added by commit v3.2.0-rc1~286^2~1 (Help: Document IMPORTED_CONFIGURATIONS target property for Find modules, 2014-12-04).
2016-08-03 15:12:01 +00:00
if(EXISTS "${PNG_LIBRARY_DEBUG}")
set_property(TARGET PNG::PNG APPEND PROPERTY
IMPORTED_CONFIGURATIONS DEBUG)
set_target_properties(PNG::PNG PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES_DEBUG "C"
IMPORTED_LOCATION_DEBUG "${PNG_LIBRARY_DEBUG}")
endif()
FindPNG: Create an imported PNG::PNG target (#15911) Imported targets are now the recommended way of dealing with external library dependencies. Add one for FindPNG and update documentation accordingly. Also add a test case activated by CMake_TEST_FindPNG.
2016-01-19 17:43:05 +00:00
endif()
Remove CMake-language block-end command arguments Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style. Run the following shell code: for c in else endif endforeach endfunction endmacro endwhile; do echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | egrep -z -v 'Tests/CMakeTests/While-Endwhile-' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:50:14 +00:00
endif ()
Adding Zlib and PNG find modules in the new format
2002-09-02 18:08:30 +00:00
FindPNG: support version selection
2012-01-25 17:24:44 +00:00
if (PNG_PNG_INCLUDE_DIR AND EXISTS "${PNG_PNG_INCLUDE_DIR}/png.h")
file(STRINGS "${PNG_PNG_INCLUDE_DIR}/png.h" png_version_str REGEX "^#define[ \t]+PNG_LIBPNG_VER_STRING[ \t]+\".+\"")
string(REGEX REPLACE "^#define[ \t]+PNG_LIBPNG_VER_STRING[ \t]+\"([^\"]+)\".*" "\\1" PNG_VERSION_STRING "${png_version_str}")
unset(png_version_str)
Remove CMake-language block-end command arguments Ancient versions of CMake required else(), endif(), and similar block termination commands to have arguments matching the command starting the block. This is no longer the preferred style. Run the following shell code: for c in else endif endforeach endfunction endmacro endwhile; do echo 's/\b'"$c"'\(\s*\)(.\+)/'"$c"'\1()/' done >convert.sed && git ls-files -z -- bootstrap '*.cmake' '*.cmake.in' '*CMakeLists.txt' | egrep -z -v '^(Utilities/cm|Source/kwsys/)' | egrep -z -v 'Tests/CMakeTests/While-Endwhile-' | xargs -0 sed -i -f convert.sed && rm convert.sed
2012-08-13 17:50:14 +00:00
endif ()
endif()
BUG: don't include MacroLibrary.cmake, but add a cmake module which implements ADD_FILE_DEPENDENCIES() ENH: mark the variables from FindPNG.cmake as advanced Alex
2006-03-20 17:29:56 +00:00
Modules: Include builtin FindPackageHandleStandardArgs directly The FindPackageHandleStandardArgs module was originally created outside of CMake. It was added for CMake 2.6.0 by commit e118a627 (add a macro FIND_PACKAGE_HANDLE_STANDARD_ARGS..., 2007-07-18). However, it also proliferated into a number of other projects that at the time required only CMake 2.4 and thus could not depend on CMake to provide the module. CMake's own find modules started using the module in commit b5f656e0 (use the new FIND_PACKAGE_HANDLE_STANDARD_ARGS in some of the FindXXX modules..., 2007-07-18). Then commit d358cf5c (add 2nd, more powerful mode to find_package_handle_standard_args, 2010-07-29) added a new feature to the interface of the module that was fully optional and backward compatible with all existing users of the module. Later commit 5f183caa (FindZLIB: use the FPHSA version mode, 2010-08-04) and others shortly thereafter started using the new interface in CMake's own find modules. This change was also backward compatible because it was only an implementation detail within each module. Unforutnately these changes introduced a problem for projects that still have an old copy of FindPackageHandleStandardArgs in CMAKE_MODULE_PATH. When any such project uses one of CMake's builtin find modules the line include(FindPackageHandleStandardArgs) loads the copy from the project which does not have the new interface! Then the including find module tries to use the new interface with the old module and fails. Whether this breakage can be considered a backward incompatible change in CMake is debatable. The situation is analagous to copying a standard library header from one version of a compiler into a project and then observing problems when the next version of the compiler reports errors in its other headers that depend on its new version of the original header. Nevertheless it is a change to CMake that causes problems for projects that worked with previous versions. This problem was discovered during the 2.8.3 release candidate cycle. It is an instance of a more general problem with projects that provide their own versions of CMake modules when other CMake modules depend on them. At the time we resolved this instance of the problem with commit b0118402 (Use absolute path to FindPackageHandleStandardArgs.cmake everywhere, 2010-09-28) for the 2.8.3 release. In order to address the more general problem we introduced policy CMP0017 in commit db44848f (Prefer files from CMAKE_ROOT when including from CMAKE_ROOT, 2010-11-17). That change was followed by commit ce28737c (Remove usage of CMAKE_CURRENT_LIST_DIR now that we have CMP0017, 2010-12-20) which reverted the original workaround in favor of using the policy. However, existing project releases do not set the policy behavior to NEW and therefore still exhibit the problem. We introduced in commit a364daf1 (Allow users to specify defaults for unset policies, 2011-01-03) an option for users to build existing projects by adding -DCMAKE_POLICY_DEFAULT_CMP0017=NEW to the command line. Unfortunately this solution still does not allow such projects to build out of the box, and there is no good way to suggest the use of the new option. The only remaining solution to keep existing projects that exhibit this problem building is to restore the change originally made in commit b0118402 (Use absolute path to FindPackageHandleStandardArgs.cmake everywhere, 2010-09-28). This also avoids policy CMP0017 warnings for this particular instance of the problem the policy addresses.
2011-01-20 15:56:49 +00:00
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FindPNG: support version selection
2012-01-25 17:24:44 +00:00
find_package_handle_standard_args(PNG
REQUIRED_VARS PNG_LIBRARY PNG_PNG_INCLUDE_DIR
VERSION_VAR PNG_VERSION_STRING)
ENH: also look in /usr/local/include/libpng (OpenBSD) ENH: error out with FATAL_ERROR if REQUIRED was given but png hasn't been found Alex
2006-08-30 17:47:54 +00:00
ENH: just converted case to lower for the book
2009-07-21 16:45:37 +00:00
mark_as_advanced(PNG_PNG_INCLUDE_DIR PNG_LIBRARY )
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