# Copyright (C) 2020 Dieter Baron and Thomas Klausner
#
# The authors can be contacted at <[email protected]>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# 3. The names of the authors may not be used to endorse or promote
# products derived from this software without specific prior
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# THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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#[=======================================================================[.rst:
FindNettle
-------
Finds the Nettle library.
Imported Targets
^^^^^^^^^^^^^^^^
This module provides the following imported targets, if found:
``Nettle::Nettle``
The Nettle library
Result Variables
^^^^^^^^^^^^^^^^
This will define the following variables:
``Nettle_FOUND``
True if the system has the Nettle library.
``Nettle_VERSION``
The version of the Nettle library which was found.
``Nettle_INCLUDE_DIRS``
Include directories needed to use Nettle.
``Nettle_LIBRARIES``
Libraries needed to link to Nettle.
Cache Variables
^^^^^^^^^^^^^^^
The following cache variables may also be set:
``Nettle_INCLUDE_DIR``
The directory containing ``nettle/aes.h``.
``Nettle_LIBRARY``
The path to the Nettle library.
#]=======================================================================]
find_package(PkgConfig)
pkg_check_modules(PC_Nettle QUIET nettle)
find_path(Nettle_INCLUDE_DIR
NAMES nettle/aes.h nettle/md5.h nettle/pbkdf2.h nettle/ripemd160.h nettle/sha.h
PATHS ${PC_Nettle_INCLUDE_DIRS}
)
find_library(Nettle_LIBRARY
NAMES nettle
PATHS ${PC_Nettle_LIBRARY_DIRS}
)
# Extract version information from the header file
if(Nettle_INCLUDE_DIR)
# This file only exists in nettle>=3.0
if(EXISTS ${Nettle_INCLUDE_DIR}/nettle/version.h)
file(STRINGS ${Nettle_INCLUDE_DIR}/nettle/version.h _ver_major_line
REGEX "^#define NETTLE_VERSION_MAJOR *[0-9]+"
LIMIT_COUNT 1)
string(REGEX MATCH "[0-9]+"
Nettle_MAJOR_VERSION "${_ver_major_line}")
file(STRINGS ${Nettle_INCLUDE_DIR}/nettle/version.h _ver_minor_line
REGEX "^#define NETTLE_VERSION_MINOR *[0-9]+"
LIMIT_COUNT 1)
string(REGEX MATCH "[0-9]+"
Nettle_MINOR_VERSION "${_ver_minor_line}")
set(Nettle_VERSION "${Nettle_MAJOR_VERSION}.${Nettle_MINOR_VERSION}")
unset(_ver_major_line)
unset(_ver_minor_line)
else()
if(PC_Nettle_VERSION)
set(Nettle_VERSION ${PC_Nettle_VERSION})
else()
set(Nettle_VERSION "1.0")
endif()
endif()
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Nettle
FOUND_VAR Nettle_FOUND
REQUIRED_VARS
Nettle_LIBRARY
Nettle_INCLUDE_DIR
VERSION_VAR Nettle_VERSION
)
if(Nettle_FOUND)
set(Nettle_LIBRARIES ${Nettle_LIBRARY})
set(Nettle_INCLUDE_DIRS ${Nettle_INCLUDE_DIR})
set(Nettle_DEFINITIONS ${PC_Nettle_CFLAGS_OTHER})
endif()
if(Nettle_FOUND AND NOT TARGET Nettle::Nettle)
add_library(Nettle::Nettle UNKNOWN IMPORTED)
set_target_properties(Nettle::Nettle PROPERTIES
IMPORTED_LOCATION "${Nettle_LIBRARY}"
INTERFACE_COMPILE_OPTIONS "${PC_Nettle_CFLAGS_OTHER}"
INTERFACE_INCLUDE_DIRECTORIES "${Nettle_INCLUDE_DIR}"
)
endif()
mark_as_advanced(
Nettle_INCLUDE_DIR
Nettle_LIBRARY
)
# compatibility variables
set(Nettle_VERSION_STRING ${Nettle_VERSION})
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