mirror of
https://github.com/ceph/ceph
synced 2024-12-12 06:28:31 +00:00
d81478b569
in this change: * an interface library named "fmt-header-only" is introduced. it brings the support to the header only fmt library. * fmt::fmt is renamed to fmt * an option named "WITH_FMT_HEADER_ONLY" is introduced * fmt::fmt is an alias of "fmt-header-only" if "WITH_FMT_HEADER_ONLY" is "ON", and an alias of "fmt" otherwise. because fmt is packaged in EPEL, while librados is packaged in RHEL, so we cannot have fmt as a runtime dependency of librados. to address this issue an option "WITH_FMT_HEADER_ONLY" is introduced, so that we can enable it when building Ceph with the header version of fmt. and the built packages won't have runtime dependency of fmt. Signed-off-by: Kefu Chai <kchai@redhat.com>
62 lines
2.1 KiB
CMake
62 lines
2.1 KiB
CMake
find_path(fmt_INCLUDE_DIR NAMES fmt/format.h)
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if(fmt_INCLUDE_DIR)
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set(_fmt_version_file "${fmt_INCLUDE_DIR}/fmt/core.h")
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if(NOT EXISTS "${_fmt_version_file}")
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set(_fmt_version_file "${fmt_INCLUDE_DIR}/fmt/format.h")
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endif()
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if(EXISTS "${_fmt_version_file}")
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# parse "#define FMT_VERSION 40100" to 4.1.0
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file(STRINGS "${_fmt_version_file}" fmt_VERSION_LINE
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REGEX "^#define[ \t]+FMT_VERSION[ \t]+[0-9]+$")
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string(REGEX REPLACE "^#define[ \t]+FMT_VERSION[ \t]+([0-9]+)$"
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"\\1" fmt_VERSION "${fmt_VERSION_LINE}")
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foreach(ver "fmt_VERSION_PATCH" "fmt_VERSION_MINOR" "fmt_VERSION_MAJOR")
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math(EXPR ${ver} "${fmt_VERSION} % 100")
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math(EXPR fmt_VERSION "(${fmt_VERSION} - ${${ver}}) / 100")
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endforeach()
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set(fmt_VERSION
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"${fmt_VERSION_MAJOR}.${fmt_VERSION_MINOR}.${fmt_VERSION_PATCH}")
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endif()
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endif()
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find_library(fmt_LIBRARY NAMES fmt)
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(fmt
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REQUIRED_VARS fmt_INCLUDE_DIR fmt_LIBRARY
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VERSION_VAR fmt_VERSION)
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mark_as_advanced(
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fmt_INCLUDE_DIR
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fmt_LIBRARY
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fmt_VERSION_MAJOR
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fmt_VERSION_MINOR
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fmt_VERSION_PATCH
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fmt_VERSION_STRING)
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if(fmt_FOUND AND NOT (TARGET fmt::fmt))
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add_library(fmt-header-only INTERFACE)
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set_target_properties(fmt-header-only PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${fmt_INCLUDE_DIR}"
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INTERFACE_COMPILE_DEFINITIONS FMT_HEADER_ONLY=1
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INTERFACE_COMPILE_FEATURES cxx_std_11)
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add_library(fmt UNKNOWN IMPORTED GLOBAL)
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set_target_properties(fmt PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${fmt_INCLUDE_DIR}"
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INTERFACE_COMPILE_FEATURES cxx_std_11
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IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
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IMPORTED_LOCATION "${fmt_LIBRARY}")
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if(WITH_FMT_HEADER_ONLY)
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# please note, this is different from how upstream defines fmt::fmt.
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# in order to force 3rd party libraries to link against fmt-header-only if
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# WITH_FMT_HEADER_ONLY is ON, we have to point fmt::fmt to fmt-header-only
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# in this case.
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add_library(fmt::fmt ALIAS fmt-header-only)
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else()
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add_library(fmt::fmt ALIAS fmt)
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endif()
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endif()
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