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cmake: link against liblzma when found, for libunwind

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Some versions of libunwind need liblzma. If liblzma is found,
we link against it unconditionally. If the installed libunwind
didn't need it, this is a nop.

Tested and fine tuned by iDunk
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moneromooo-monero 2016-12-10 11:17:27 +00:00
parent 049b7e9a93
commit 0020ad7d99
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16
cmake/FindLibunwind.cmake
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@ -17,6 +17,22 @@ find_path(LIBUNWIND_INCLUDE_DIR libunwind.h
)
find_library(LIBUNWIND_LIBRARIES NAMES unwind )
if(NOT LIBUNWIND_LIBRARIES STREQUAL "LIBUNWIND_LIBRARIES-NOTFOUND")
if (CMAKE_COMPILER_IS_GNUCC)
set(LIBUNWIND_LIBRARIES "gcc_eh;${LIBUNWIND_LIBRARIES}")
endif()
endif()
# some versions of libunwind need liblzma, and we don't use pkg-config
# so we just look whether liblzma is installed, and add it if it is.
# It might not be actually needed, but doesn't hurt if it is not.
# We don't need any headers, just the lib, as it's privately needed.
message(STATUS "looking for liblzma")
find_library(LIBLZMA_LIBRARIES lzma )
if(NOT LIBLZMA_LIBRARIES STREQUAL "LIBLZMA_LIBRARIES-NOTFOUND")
message(STATUS "liblzma found")
set(LIBUNWIND_LIBRARIES "${LIBUNWIND_LIBRARIES};${LIBLZMA_LIBRARIES}")
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Libunwind "Could not find libunwind" LIBUNWIND_INCLUDE_DIR LIBUNWIND_LIBRARIES)