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-rw-r--r--cmake/modules/Findfmt.cmake61
1 files changed, 61 insertions, 0 deletions
diff --git a/cmake/modules/Findfmt.cmake b/cmake/modules/Findfmt.cmake
new file mode 100644
index 000000000..734c2b057
--- /dev/null
+++ b/cmake/modules/Findfmt.cmake
@@ -0,0 +1,61 @@
+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()