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find_path(fmt_INCLUDE_DIR NAMES fmt/format.h)
if(fmt_INCLUDE_DIR)
set(_fmt_version_file "${fmt_INCLUDE_DIR}/fmt/core.h")
if(NOT EXISTS "${_fmt_version_file}")
set(_fmt_version_file "${fmt_INCLUDE_DIR}/fmt/format.h")
endif()
if(EXISTS "${_fmt_version_file}")
# parse "#define FMT_VERSION 40100" to 4.1.0
file(STRINGS "${_fmt_version_file}" fmt_VERSION_LINE
REGEX "^#define[ \t]+FMT_VERSION[ \t]+[0-9]+$")
string(REGEX REPLACE "^#define[ \t]+FMT_VERSION[ \t]+([0-9]+)$"
"\\1" fmt_VERSION "${fmt_VERSION_LINE}")
foreach(ver "fmt_VERSION_PATCH" "fmt_VERSION_MINOR" "fmt_VERSION_MAJOR")
math(EXPR ${ver} "${fmt_VERSION} % 100")
math(EXPR fmt_VERSION "(${fmt_VERSION} - ${${ver}}) / 100")
endforeach()
set(fmt_VERSION
"${fmt_VERSION_MAJOR}.${fmt_VERSION_MINOR}.${fmt_VERSION_PATCH}")
endif()
endif()
find_library(fmt_LIBRARY NAMES fmt)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(fmt
REQUIRED_VARS fmt_INCLUDE_DIR fmt_LIBRARY
VERSION_VAR fmt_VERSION)
mark_as_advanced(
fmt_INCLUDE_DIR
fmt_LIBRARY
fmt_VERSION_MAJOR
fmt_VERSION_MINOR
fmt_VERSION_PATCH
fmt_VERSION_STRING)
if(fmt_FOUND AND NOT (TARGET fmt::fmt))
add_library(fmt-header-only INTERFACE)
set_target_properties(fmt-header-only PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${fmt_INCLUDE_DIR}"
INTERFACE_COMPILE_DEFINITIONS FMT_HEADER_ONLY=1
INTERFACE_COMPILE_FEATURES cxx_std_11)
add_library(fmt UNKNOWN IMPORTED GLOBAL)
set_target_properties(fmt PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${fmt_INCLUDE_DIR}"
INTERFACE_COMPILE_FEATURES cxx_std_11
IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
IMPORTED_LOCATION "${fmt_LIBRARY}")
if(WITH_FMT_HEADER_ONLY)
# please note, this is different from how upstream defines fmt::fmt.
# in order to force 3rd party libraries to link against fmt-header-only if
# WITH_FMT_HEADER_ONLY is ON, we have to point fmt::fmt to fmt-header-only
# in this case.
add_library(fmt::fmt ALIAS fmt-header-only)
else()
add_library(fmt::fmt ALIAS fmt)
endif()
endif()
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