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Download zlib with FetchContent for cross-compile #88

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21 changes: 18 additions & 3 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
CMAKE_MINIMUM_REQUIRED(VERSION 3.0 FATAL_ERROR)
CMAKE_MINIMUM_REQUIRED(VERSION 3.11 FATAL_ERROR)
if(COMMAND cmake_policy)
cmake_policy(SET CMP0003 NEW)
endif(COMMAND cmake_policy)
Expand All @@ -9,12 +9,27 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

option(ENABLE_STATIC "Build static (.a) library" ON)

find_package(ZLIB REQUIRED)
option(DOWNLOAD_ZLIB "Download Zlib with FetchContent" ON)

if(DOWNLOAD_ZLIB)
include(FetchContent)
FetchContent_Declare(
zlib
URL https://zlib.net/zlib-1.2.12.tar.gz
)
FetchContent_MakeAvailable(zlib)
set(ZLIB_LINK zlib)
else()
find_package(ZLIB REQUIRED)
include_directories(${ZLIB_INCLUDE_DIRS})
set(ZLIB_LINK ${ZLIB_LIBRARIES})
endif(DOWNLOAD_ZLIB)

include_directories(${ZLIB_INCLUDE_DIRS})

add_library(cnpy SHARED "cnpy.cpp")
target_link_libraries(cnpy ${ZLIB_LIBRARIES})
target_link_libraries(cnpy ${ZLIB_LINK})

install(TARGETS "cnpy" LIBRARY DESTINATION lib PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)

if(ENABLE_STATIC)
Expand Down