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-rw-r--r--cmake/modules/Buildc-ares.cmake22
1 files changed, 22 insertions, 0 deletions
diff --git a/cmake/modules/Buildc-ares.cmake b/cmake/modules/Buildc-ares.cmake
new file mode 100644
index 000000000..ff9452095
--- /dev/null
+++ b/cmake/modules/Buildc-ares.cmake
@@ -0,0 +1,22 @@
+function(build_c_ares)
+ include(ExternalProject)
+ set(C-ARES_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/c-ares")
+ set(C-ARES_BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/c-ares")
+ ExternalProject_Add(c-ares_ext
+ SOURCE_DIR "${C-ARES_SOURCE_DIR}"
+ CMAKE_ARGS
+ -DCARES_STATIC=ON
+ -DCARES_SHARED=OFF
+ -DCARES_INSTALL=OFF
+ BINARY_DIR "${C-ARES_BINARY_DIR}"
+ BUILD_COMMAND ${CMAKE_COMMAND} --build <BINARY_DIR>
+ INSTALL_COMMAND "")
+ add_library(c-ares::c-ares STATIC IMPORTED)
+ add_dependencies(c-ares::c-ares c-ares_ext)
+ set_target_properties(c-ares::c-ares PROPERTIES
+ INTERFACE_INCLUDE_DIRECTORIES "${C-ARES_SOURCE_DIR};${C-ARES_BINARY_DIR}"
+ IMPORTED_LINK_INTERFACE_LANGUAGES "C"
+ IMPORTED_LOCATION "${C-ARES_BINARY_DIR}/lib/libcares.a")
+ # to appease find_package()
+ add_custom_target(c-ares DEPENDS c-ares::c-ares)
+endfunction()