ClickHouse/libs/libdaemon/cmake/find_unwind.cmake

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CMake
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include (CMakePushCheckState)
cmake_push_check_state ()
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if (CMAKE_SYSTEM MATCHES "Linux" AND NOT ARCH_ARM)
option (USE_INTERNAL_UNWIND_LIBRARY "Set to FALSE to use system unwind library instead of bundled" ${NOT_UNBUNDLED})
else ()
option (USE_INTERNAL_UNWIND_LIBRARY "Set to FALSE to use system unwind library instead of bundled" OFF)
endif ()
if (NOT USE_INTERNAL_UNWIND_LIBRARY)
find_library (UNWIND_LIBRARY unwind)
find_path (UNWIND_INCLUDE_DIR NAMES unwind.h PATHS ${UNWIND_INCLUDE_PATHS})
include (CheckCXXSourceCompiles)
set(CMAKE_REQUIRED_INCLUDES ${UNWIND_INCLUDE_DIR})
set(CMAKE_REQUIRED_LIBRARIES ${UNWIND_LIBRARY})
check_cxx_source_compiles("
#include <ucontext.h>
#define UNW_LOCAL_ONLY
#include <libunwind.h>
int main () {
ucontext_t context;
unw_cursor_t cursor;
unw_init_local_signal(&cursor, &context);
return 0;
}
" HAVE_UNWIND_INIT_LOCAL_SIGNAL)
if (NOT HAVE_UNWIND_INIT_LOCAL_SIGNAL)
set(UNWIND_LIBRARY "")
set(UNWIND_INCLUDE_DIR "")
endif ()
endif ()
if (UNWIND_LIBRARY AND UNWIND_INCLUDE_DIR)
set (USE_UNWIND 1)
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elseif (CMAKE_SYSTEM MATCHES "Linux" AND NOT ARCH_ARM)
set (USE_INTERNAL_UNWIND_LIBRARY 1)
set (UNWIND_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/libunwind/include")
set (UNWIND_LIBRARY unwind)
set (USE_UNWIND 1)
endif ()
message (STATUS "Using unwind=${USE_UNWIND}: ${UNWIND_INCLUDE_DIR} : ${UNWIND_LIBRARY}")
cmake_pop_check_state ()