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# Find libimagequant includes and library (and download+build if needed)
# http://pngquant.org/lib
#
# This module defines
# LIQ_INCLUDE_DIR, where to find libimagequant.h
# LIQ_LIBRARIES, the libraries to link against to use libimagequant.
# LIQ_FOUND, If false, do not try to use libimagequant.
SET(LIQ_FOUND "NO")
FIND_PATH(LIQ_INCLUDE_DIR libimagequant.h
"${PROJECT_SOURCE_DIR}/libimagequant"
"${PROJECT_SOURCE_DIR}/pngquant/lib"
/usr/local/include
/usr/include
)
FIND_LIBRARY(LIQ_LIBRARY
NAMES libimagequant imagequant
PATHS "${PROJECT_SOURCE_DIR}/libimagequant" "${PROJECT_SOURCE_DIR}/pngquant/lib" /usr/lib64 /usr/lib /usr/local/lib
)
IF (LIQ_LIBRARY AND LIQ_INCLUDE_DIR)
SET(LIQ_FOUND "YES")
SET(LIQ_LIBRARIES ${LIQ_LIBRARY})
SET(HAVE_LIBIMAGEQUANT 1)
ENDIF (LIQ_LIBRARY AND LIQ_INCLUDE_DIR)
IF (LIQ_FOUND)
IF (NOT LIQ_FIND_QUIETLY)
MESSAGE(STATUS "Found LIQ: ${LIQ_LIBRARY} ${LIQ_INCLUDE_DIR}")
ENDIF (NOT LIQ_FIND_QUIETLY)
ELSE (LIQ_FOUND)
# if existing library not found, then download and build it
IF (NOT WIN32 OR CYGWIN OR MINGW) # MSVC's C compiler is too old to compile libimagequant
IF (CMAKE_VERSION VERSION_GREATER "2.8.1")
MESSAGE(STATUS "LIQ will be built")
INCLUDE(ExternalProject)
EXTERNALPROJECT_ADD(
libimagequant
URL "http://pngquant.org/libimagequant-2.0.0-src.tar.bz2"
SOURCE_DIR libimagequant
BUILD_IN_SOURCE 1
INSTALL_DIR libimagequant
INSTALL_COMMAND true
CONFIGURE_COMMAND true
BUILD_COMMAND make static CFLAGSADD='-fPIC'
)
SET(LIQ_FOUND "SORTOF")
SET(LIQ_BUILD "YES")
SET(LIQ_LIBRARIES "${PROJECT_BINARY_DIR}/libimagequant/libimagequant.a")
SET(LIQ_INCLUDE_DIR "${PROJECT_BINARY_DIR}/libimagequant/")
SET(HAVE_LIBIMAGEQUANT 1)
ENDIF(CMAKE_VERSION VERSION_GREATER "2.8.1")
ENDIF(NOT WIN32 OR CYGWIN OR MINGW)
ENDIF (LIQ_FOUND)
MARK_AS_ADVANCED(LIQ_INCLUDE_DIR LIQ_LIBRARIES LIQ_BUILD)
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