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#[[
Defines a platform-support target _mongocrypt::platform.
This target sets certain internal-only compile definitions, and defines
usage requirements on certain platform features required by libmongocrypt
(Threads, dlopen(), math)
]]
add_library (lmc-platform INTERFACE)
add_library (mongocrypt::platform ALIAS lmc-platform)
install (TARGETS lmc-platform EXPORT mongocrypt_targets)
set_property (
TARGET lmc-platform
PROPERTY EXPORT_NAME mongocrypt::platform
)
# Threads:
find_package (Threads REQUIRED)
# Special math:
if (NOT APPLE)
find_library (M_LIBRARY m)
endif ()
# Special runtime:
find_library (RT_LIBRARY rt)
# Endian detection:
if (DEFINED CMAKE_C_BYTE_ORDER)
# Newer CMake knows this immediately:
set (MONGOCRYPT_ENDIAN_DEF "MONGOCRYPT_${CMAKE_C_BYTE_ORDER}")
else ()
include (TestBigEndian)
test_big_endian (_is_big)
set (MONGOCRYPT_ENDIAN_DEF "MONGOCRYPT_$<IF:${_is_big},BIG,LITTLE>_ENDIAN")
endif ()
target_compile_definitions (lmc-platform INTERFACE
"$<BUILD_INTERFACE:${MONGOCRYPT_ENDIAN_DEF}>"
)
target_link_libraries (lmc-platform INTERFACE
Threads::Threads
# These are build-interface libs, but still required. These will be added
# to the platform library in mongocrypt-config.cmake using the same
# find_library() calls:
$<BUILD_INTERFACE:${CMAKE_DL_LIBS}>
$<BUILD_INTERFACE:$<$<BOOL:${M_LIBRARY}>:${M_LIBRARY}>>
$<BUILD_INTERFACE:$<$<BOOL:${RT_LIBRARY}>:${RT_LIBRARY}>>
)
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