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-rw-r--r--Modules/FindPNG.cmake38
1 files changed, 36 insertions, 2 deletions
diff --git a/Modules/FindPNG.cmake b/Modules/FindPNG.cmake
index d96d2cc..a2577d2 100644
--- a/Modules/FindPNG.cmake
+++ b/Modules/FindPNG.cmake
@@ -38,8 +38,42 @@ if(ZLIB_FOUND)
/usr/local/include/libpng # OpenBSD
)
- set(PNG_NAMES ${PNG_NAMES} png libpng png15 libpng15 png15d libpng15d png14 libpng14 png14d libpng14d png12 libpng12 png12d libpng12d)
- find_library(PNG_LIBRARY NAMES ${PNG_NAMES} )
+ list(APPEND PNG_NAMES png libpng)
+ unset(PNG_NAMES_DEBUG)
+ set(_PNG_VERSION_SUFFIXES 17 16 15 14 12)
+ if (PNG_FIND_VERSION MATCHES "^[0-9]+\\.[0-9]+(\\..*)?$")
+ string(REGEX REPLACE
+ "^([0-9]+)\\.([0-9]+).*" "\\1\\2"
+ _PNG_VERSION_SUFFIX_MIN "${PNG_FIND_VERSION}")
+ 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)
+ endforeach()
+ unset(_PNG_VERSION_SUFFIXES)
+ # For compatiblity with versions prior to this multi-config search, honor
+ # 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()
+ 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)
if (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR)
# png.h includes zlib.h. Sigh.