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# LibLZMA is a recent addition to the emscripten SDK, so it is possible
# someone hasn't updated their SDK yet. Test out if the SDK supports LibLZMA.
include(CheckCXXSourceCompiles)
set(CMAKE_REQUIRED_FLAGS "-sUSE_LIBLZMA=1")
check_cxx_source_compiles("
#include <lzma.h>
int main() { return 0; }"
LIBLZMA_FOUND
)
if (LIBLZMA_FOUND)
add_library(LibLZMA::LibLZMA INTERFACE IMPORTED)
set_target_properties(LibLZMA::LibLZMA PROPERTIES
INTERFACE_COMPILE_OPTIONS "-sUSE_LIBLZMA=1"
INTERFACE_LINK_LIBRARIES "-sUSE_LIBLZMA=1"
)
else()
message(WARNING "You are using an emscripten SDK without LibLZMA support. Many savegames won't be able to load in OpenTTD. Please apply 'emsdk-liblzma.patch' to your local emsdk installation.")
endif()
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