Add FindNettle.cmake for Nettle library

CMakeLists.txt

@@ -9,7 +9,7 @@ include(FeatureSummary)
 find_package(ECM 5.27.0 CONFIG)
 set_package_properties(ECM PROPERTIES TYPE REQUIRED DESCRIPTION "Extra CMake Modules." URL "https://projects.kde.org/projects/frameworks/extra-cmake-modules")
 feature_summary(WHAT REQUIRED_PACKAGES_NOT_FOUND FATAL_ON_MISSING_REQUIRED_PACKAGES)
-set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake ${CMAKE_SOURCE_DIR})
 
 # Many includes from ECM, to get all the nice cmake functions and settings
 include(KDEInstallDirs)
@@ -88,6 +88,9 @@ endif()
 # Mandatory: OpenSSL
 find_package(OpenSSL REQUIRED)
 
+# Mandatory: Nettle 
+find_package(Nettle REQUIRED)
+
 # Mandatory: KF5
 find_package(KF5 REQUIRED COMPONENTS Archive)
 

FindNettle.cmake

@@ -0,0 +1,27 @@
+# - Try to find nettle
+# Once done this will define
+#  NETTLE_FOUND - System has nettle
+#  NETTLE_INCLUDE_DIRS - The nettle include directories
+#  NETTLE_LIBRARIES - The libraries needed to use nettle
+#  NETTLE_DEFINITIONS - Compiler switches required for using nettle
+
+find_package(PkgConfig)
+pkg_check_modules(PC_NETTLE QUIET nettle)
+set(NETTLE_DEFINITIONS ${PC_NETTLE_CFLAGS_OTHER})
+
+find_path(NETTLE_INCLUDE_DIR NAMES nettle/hkdf.h nettle/hmac.h nettle/sha2.h
+            HINTS ${PC_NETTLE_INCLUDEDIR} ${PC_NETTLE_INCLUDE_DIRS}
+            PATH_SUFFIXES nettle )
+
+find_library(NETTLE_LIBRARY NAMES nettle libnettle
+            HINTS ${PC_NETTLE_LIBDIR} ${PC_NETTLE_LIBRARY_DIRS} )
+
+set(NETTLE_LIBRARIES ${NETTLE_LIBRARY} )
+set(NETTLE_INCLUDE_DIRS ${NETTLE_INCLUDE_DIR} )
+
+include(FindPackageHandleStandardArgs)
+# handle the QUIETLY and REQUIRED arguments and set NETTLE_FOUND to TRUE
+# if all listed variables are TRUE
+find_package_handle_standard_args(nettle  DEFAULT_MSG
+                                  NETTLE_LIBRARY NETTLE_INCLUDE_DIR)
+mark_as_advanced(NETTLE_INCLUDE_DIR NETTLE_LIBRARY )

src/lib/CMakeLists.txt

@@ -40,6 +40,7 @@ include_directories(
 )
 
 include_directories(${OPENSSL_INCLUDE_DIR})
+include_directories(${NETTLE_INCLUDE_DIR})
 
 set(SRCS ${SRCS}
     3rdparty/fancytabwidget.cpp
@@ -357,6 +358,7 @@ target_link_libraries(FalkonPrivate
     Qt5::WebChannel
     KF5::Archive
     ${OPENSSL_CRYPTO_LIBRARY}
+    ${NETTLE_LIBRARY}
 )
 
 if (UNIX AND NOT APPLE)