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FindPNG: provide PNG_INCLUDE_DIRS, as the readme.txt says (#11312) 

Also improve the documentation a bit.

Alex
This commit is contained in:
Alex Neundorf 2011-11-18 19:20:07 +01:00
parent 8e1bbee4d9
commit df0f302485
1 changed files with 11 additions and 6 deletions
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17
Modules/FindPNG.cmake
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@ -1,14 +1,18 @@
# - Find the native PNG includes and library
#
# This module defines
# PNG_INCLUDE_DIR, where to find png.h, etc.
# This module searches libpng, the library for working with PNG images.
#
# It defines the following variables
# PNG_INCLUDE_DIRS, where to find png.h, etc.
# PNG_LIBRARIES, the libraries to link against to use PNG.
# PNG_DEFINITIONS - You should add_definitons(${PNG_DEFINITIONS}) before compiling code that includes png library files.
# PNG_FOUND, If false, do not try to use PNG.
# also defined, but not for general use are
# Also defined, but not for general use are
# PNG_LIBRARY, where to find the PNG library.
# None of the above will be defined unles zlib can be found.
# PNG depends on Zlib
# For backward compatiblity the variable PNG_INCLUDE_DIR is also set. It has the same value as PNG_INCLUDE_DIRS.
#
# Since PNG depends on the ZLib compression library, none of the above will be
# defined unless ZLib can be found.
#=============================================================================
# Copyright 2002-2009 Kitware, Inc.
@ -38,7 +42,8 @@ if(ZLIB_FOUND)
if (PNG_LIBRARY AND PNG_PNG_INCLUDE_DIR)
# png.h includes zlib.h. Sigh.
SET(PNG_INCLUDE_DIR ${PNG_PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )
SET(PNG_INCLUDE_DIRS ${PNG_PNG_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )
SET(PNG_INCLUDE_DIR ${PNG_INCLUDE_DIRS} ) # for backward compatiblity
SET(PNG_LIBRARIES ${PNG_LIBRARY} ${ZLIB_LIBRARY})
if (CYGWIN)