ddnet/cmake/FindZLIB.cmake

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CMake
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if(NOT PREFER_BUNDLED_LIBS)
set(CMAKE_MODULE_PATH ${ORIGINAL_CMAKE_MODULE_PATH})
find_package(ZLIB)
set(CMAKE_MODULE_PATH ${OWN_CMAKE_MODULE_PATH})
if(ZLIB_FOUND)
set(ZLIB_BUNDLED OFF)
set(ZLIB_DEP)
endif()
endif()
if(NOT ZLIB_FOUND)
set(ZLIB_BUNDLED ON)
set(ZLIB_SRC_DIR src/engine/external/zlib)
set_glob(ZLIB_SRC GLOB ${ZLIB_SRC_DIR}
adler32.c
compress.c
crc32.c
crc32.h
deflate.c
deflate.h
gzclose.c
gzguts.h
gzlib.c
gzread.c
gzwrite.c
infback.c
inffast.c
inffast.h
inffixed.h
inflate.c
inflate.h
inftrees.c
inftrees.h
trees.c
trees.h
uncompr.c
zconf.h
zlib.h
zutil.c
zutil.h
)
add_library(zlib EXCLUDE_FROM_ALL OBJECT ${ZLIB_SRC})
set(ZLIB_INCLUDEDIR ${ZLIB_SRC_DIR})
target_include_directories(zlib PRIVATE ${ZLIB_INCLUDEDIR})
set(ZLIB_DEP $<TARGET_OBJECTS:zlib>)
set(ZLIB_INCLUDE_DIRS ${ZLIB_INCLUDEDIR})
set(ZLIB_LIBRARIES)
list(APPEND TARGETS_DEP zlib)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(ZLIB DEFAULT_MSG ZLIB_INCLUDEDIR)
endif()