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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.
This commit is contained in:
Brad King 2013-09-13 11:52:48 -04:00
parent 4c4bafdeab
commit 68160448b9
1 changed files with 9 additions and 5 deletions
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10
Modules/FindPNG.cmake
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@ -58,15 +58,19 @@ if(ZLIB_FOUND)
list(APPEND PNG_NAMES png${v} libpng${v})
list(APPEND PNG_NAMES_DEBUG png${v}d libpng${v}d)
endforeach()
message(STATUS "PNG r: ${PNG_NAMES} d: ${PNG_NAMES_DEBUG}")
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)
include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake)
select_library_configurations(PNG)
# Set by select_library_configurations(), but we want the one from
# find_package_handle_standard_args() below.
unset(PNG_FOUND)