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      1 # Written in 2016 by Henrik Steffen Gamann <henrik (a] gassmann.onl>
      2 #
      3 # To the extent possible under law, the author(s) have dedicated all
      4 # copyright and related and neighboring rights to this software to the
      5 # public domain worldwide. This software is distributed without any warranty.
      6 #
      7 # You should have received a copy of the CC0 Public Domain Dedication
      8 # along with this software. If not, see
      9 #
     10 #     http://creativecommons.org/publicdomain/zero/1.0/
     11 #
     12 ########################################################################
     13 # Tries to find the local libsodium installation.
     14 #
     15 # On Windows the sodium_DIR environment variable is used as a default
     16 # hint which can be overridden by setting the corresponding cmake variable.
     17 #
     18 # Once done the following variables will be defined:
     19 #
     20 #   sodium_FOUND
     21 #   sodium_INCLUDE_DIR
     22 #   sodium_LIBRARY_DEBUG
     23 #   sodium_LIBRARY_RELEASE
     24 #
     25 #
     26 # Furthermore an imported "sodium" target is created.
     27 #
     28 
     29 if (CMAKE_C_COMPILER_ID STREQUAL "GNU"
     30     OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
     31     set(_GCC_COMPATIBLE 1)
     32 endif()
     33 
     34 # static library option
     35 if (NOT DEFINED sodium_USE_STATIC_LIBS)
     36     option(sodium_USE_STATIC_LIBS "enable to statically link against sodium" OFF)
     37 endif()
     38 if(NOT (sodium_USE_STATIC_LIBS EQUAL sodium_USE_STATIC_LIBS_LAST))
     39     unset(sodium_LIBRARY CACHE)
     40     unset(sodium_LIBRARY_DEBUG CACHE)
     41     unset(sodium_LIBRARY_RELEASE CACHE)
     42     unset(sodium_DLL_DEBUG CACHE)
     43     unset(sodium_DLL_RELEASE CACHE)
     44     set(sodium_USE_STATIC_LIBS_LAST ${sodium_USE_STATIC_LIBS} CACHE INTERNAL "internal change tracking variable")
     45 endif()
     46 
     47 
     48 ########################################################################
     49 # UNIX
     50 if (UNIX)
     51     # import pkg-config
     52     find_package(PkgConfig QUIET)
     53     if (PKG_CONFIG_FOUND)
     54         pkg_check_modules(sodium_PKG QUIET libsodium)
     55     endif()
     56 
     57     if(sodium_USE_STATIC_LIBS)
     58         foreach(_libname ${sodium_PKG_STATIC_LIBRARIES})
     59             if (NOT _libname MATCHES "^lib.*\\.a$") # ignore strings already ending with .a
     60                 list(INSERT sodium_PKG_STATIC_LIBRARIES 0 "lib${_libname}.a")
     61             endif()
     62         endforeach()
     63         list(REMOVE_DUPLICATES sodium_PKG_STATIC_LIBRARIES)
     64 
     65         # if pkgconfig for libsodium doesn't provide
     66         # static lib info, then override PKG_STATIC here..
     67         if (sodium_PKG_STATIC_LIBRARIES STREQUAL "")
     68             set(sodium_PKG_STATIC_LIBRARIES libsodium.a)
     69         endif()
     70 
     71         set(XPREFIX sodium_PKG_STATIC)
     72     else()
     73         if (sodium_PKG_LIBRARIES STREQUAL "")
     74             set(sodium_PKG_LIBRARIES sodium)
     75         endif()
     76 
     77         set(XPREFIX sodium_PKG)
     78     endif()
     79 
     80     find_path(sodium_INCLUDE_DIR sodium.h
     81         HINTS ${${XPREFIX}_INCLUDE_DIRS}
     82     )
     83     find_library(sodium_LIBRARY_DEBUG NAMES ${${XPREFIX}_LIBRARIES}
     84         HINTS ${${XPREFIX}_LIBRARY_DIRS}
     85     )
     86     find_library(sodium_LIBRARY_RELEASE NAMES ${${XPREFIX}_LIBRARIES}
     87         HINTS ${${XPREFIX}_LIBRARY_DIRS}
     88     )
     89 
     90 
     91 ########################################################################
     92 # Windows
     93 elseif (WIN32)
     94     set(sodium_DIR "$ENV{sodium_DIR}" CACHE FILEPATH "sodium install directory")
     95     mark_as_advanced(sodium_DIR)
     96 
     97     find_path(sodium_INCLUDE_DIR sodium.h
     98         HINTS ${sodium_DIR}
     99         PATH_SUFFIXES include
    100     )
    101 
    102     if (MSVC)
    103         # detect target architecture
    104         file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/arch.c" [=[
    105             #if defined _M_IX86
    106             #error ARCH_VALUE x86_32
    107             #elif defined _M_X64
    108             #error ARCH_VALUE x86_64
    109             #endif
    110             #error ARCH_VALUE unknown
    111         ]=])
    112         try_compile(_UNUSED_VAR "${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_BINARY_DIR}/arch.c"
    113             OUTPUT_VARIABLE _COMPILATION_LOG
    114         )
    115         string(REGEX REPLACE ".*ARCH_VALUE ([a-zA-Z0-9_]+).*" "\\1" _TARGET_ARCH "${_COMPILATION_LOG}")
    116 
    117         # construct library path
    118         if (_TARGET_ARCH STREQUAL "x86_32")
    119             string(APPEND _PLATFORM_PATH "Win32")
    120         elseif(_TARGET_ARCH STREQUAL "x86_64")
    121             string(APPEND _PLATFORM_PATH "x64")
    122         else()
    123             message(FATAL_ERROR "the ${_TARGET_ARCH} architecture is not supported by Findsodium.cmake.")
    124         endif()
    125         string(APPEND _PLATFORM_PATH "/$$CONFIG$$")
    126 
    127         if (MSVC_VERSION LESS 1900)
    128             math(EXPR _VS_VERSION "${MSVC_VERSION} / 10 - 60")
    129         else()
    130             math(EXPR _VS_VERSION "${MSVC_VERSION} / 10 - 50")
    131         endif()
    132         string(APPEND _PLATFORM_PATH "/v${_VS_VERSION}")
    133 
    134         if (sodium_USE_STATIC_LIBS)
    135             string(APPEND _PLATFORM_PATH "/static")
    136         else()
    137             string(APPEND _PLATFORM_PATH "/dynamic")
    138         endif()
    139 
    140         string(REPLACE "$$CONFIG$$" "Debug" _DEBUG_PATH_SUFFIX "${_PLATFORM_PATH}")
    141         string(REPLACE "$$CONFIG$$" "Release" _RELEASE_PATH_SUFFIX "${_PLATFORM_PATH}")
    142 
    143         find_library(sodium_LIBRARY_DEBUG libsodium.lib
    144             HINTS ${sodium_DIR}
    145             PATH_SUFFIXES ${_DEBUG_PATH_SUFFIX}
    146         )
    147         find_library(sodium_LIBRARY_RELEASE libsodium.lib
    148             HINTS ${sodium_DIR}
    149             PATH_SUFFIXES ${_RELEASE_PATH_SUFFIX}
    150         )
    151         if (NOT sodium_USE_STATIC_LIBS)
    152             set(CMAKE_FIND_LIBRARY_SUFFIXES_BCK ${CMAKE_FIND_LIBRARY_SUFFIXES})
    153             set(CMAKE_FIND_LIBRARY_SUFFIXES ".dll")
    154             find_library(sodium_DLL_DEBUG libsodium
    155                 HINTS ${sodium_DIR}
    156                 PATH_SUFFIXES ${_DEBUG_PATH_SUFFIX}
    157             )
    158             find_library(sodium_DLL_RELEASE libsodium
    159                 HINTS ${sodium_DIR}
    160                 PATH_SUFFIXES ${_RELEASE_PATH_SUFFIX}
    161             )
    162             set(CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES_BCK})
    163         endif()
    164 
    165     elseif(_GCC_COMPATIBLE)
    166         if (sodium_USE_STATIC_LIBS)
    167             find_library(sodium_LIBRARY_DEBUG libsodium.a
    168                 HINTS ${sodium_DIR}
    169                 PATH_SUFFIXES lib
    170             )
    171             find_library(sodium_LIBRARY_RELEASE libsodium.a
    172                 HINTS ${sodium_DIR}
    173                 PATH_SUFFIXES lib
    174             )
    175         else()
    176             find_library(sodium_LIBRARY_DEBUG libsodium.dll.a
    177                 HINTS ${sodium_DIR}
    178                 PATH_SUFFIXES lib
    179             )
    180             find_library(sodium_LIBRARY_RELEASE libsodium.dll.a
    181                 HINTS ${sodium_DIR}
    182                 PATH_SUFFIXES lib
    183             )
    184 
    185             file(GLOB _DLL
    186                 LIST_DIRECTORIES false
    187                 RELATIVE "${sodium_DIR}/bin"
    188                 "${sodium_DIR}/bin/libsodium*.dll"
    189             )
    190             find_library(sodium_DLL_DEBUG ${_DLL} libsodium
    191                 HINTS ${sodium_DIR}
    192                 PATH_SUFFIXES bin
    193             )
    194             find_library(sodium_DLL_RELEASE ${_DLL} libsodium
    195                 HINTS ${sodium_DIR}
    196                 PATH_SUFFIXES bin
    197             )
    198         endif()
    199     else()
    200         message(FATAL_ERROR "this platform is not supported by FindSodium.cmake")
    201     endif()
    202 
    203 
    204 ########################################################################
    205 # unsupported
    206 else()
    207     message(FATAL_ERROR "this platform is not supported by FindSodium.cmake")
    208 endif()
    209 
    210 
    211 ########################################################################
    212 # common stuff
    213 
    214 # extract sodium version
    215 if (sodium_INCLUDE_DIR)
    216     set(_VERSION_HEADER "${_INCLUDE_DIR}/sodium/version.h")
    217     if (EXISTS _VERSION_HEADER)
    218         file(READ "${_VERSION_HEADER}" _VERSION_HEADER_CONTENT)
    219         string(REGEX REPLACE ".*#[ \t]*define[ \t]*SODIUM_VERSION_STRING[ \t]*\"([^\n]*)\".*" "\\1"
    220             sodium_VERSION "${_VERSION_HEADER_CONTENT}")
    221         set(sodium_VERSION "${sodium_VERSION}" PARENT_SCOPE)
    222     endif()
    223 endif()
    224 
    225 # communicate results
    226 include(FindPackageHandleStandardArgs)
    227 find_package_handle_standard_args(sodium
    228     REQUIRED_VARS
    229         sodium_LIBRARY_RELEASE
    230         sodium_LIBRARY_DEBUG
    231         sodium_INCLUDE_DIR
    232     VERSION_VAR
    233         sodium_VERSION
    234 )
    235 
    236 # mark file paths as advanced
    237 mark_as_advanced(sodium_INCLUDE_DIR)
    238 mark_as_advanced(sodium_LIBRARY_DEBUG)
    239 mark_as_advanced(sodium_LIBRARY_RELEASE)
    240 if (WIN32)
    241     mark_as_advanced(sodium_DLL_DEBUG)
    242     mark_as_advanced(sodium_DLL_RELEASE)
    243 endif()
    244 
    245 # create imported target
    246 if(sodium_USE_STATIC_LIBS)
    247     set(_LIB_TYPE STATIC)
    248 else()
    249     set(_LIB_TYPE SHARED)
    250 endif()
    251 add_library(sodium ${_LIB_TYPE} IMPORTED)
    252 
    253 set_target_properties(sodium PROPERTIES
    254     INTERFACE_INCLUDE_DIRECTORIES "${sodium_INCLUDE_DIR}"
    255     IMPORTED_LINK_INTERFACE_LANGUAGES "C"
    256 )
    257 
    258 if (sodium_USE_STATIC_LIBS)
    259     set_target_properties(sodium PROPERTIES
    260         INTERFACE_COMPILE_DEFINITIONS "SODIUM_STATIC"
    261         IMPORTED_LOCATION "${sodium_LIBRARY_RELEASE}"
    262         IMPORTED_LOCATION_DEBUG "${sodium_LIBRARY_DEBUG}"
    263     )
    264 else()
    265     if (UNIX)
    266         set_target_properties(sodium PROPERTIES
    267             IMPORTED_LOCATION "${sodium_LIBRARY_RELEASE}"
    268             IMPORTED_LOCATION_DEBUG "${sodium_LIBRARY_DEBUG}"
    269         )
    270     elseif (WIN32)
    271         set_target_properties(sodium PROPERTIES
    272             IMPORTED_IMPLIB "${sodium_LIBRARY_RELEASE}"
    273             IMPORTED_IMPLIB_DEBUG "${sodium_LIBRARY_DEBUG}"
    274         )
    275         if (NOT (sodium_DLL_DEBUG MATCHES ".*-NOTFOUND"))
    276             set_target_properties(sodium PROPERTIES
    277                 IMPORTED_LOCATION_DEBUG "${sodium_DLL_DEBUG}"
    278             )
    279         endif()
    280         if (NOT (sodium_DLL_RELEASE MATCHES ".*-NOTFOUND"))
    281             set_target_properties(sodium PROPERTIES
    282                 IMPORTED_LOCATION_RELWITHDEBINFO "${sodium_DLL_RELEASE}"
    283                 IMPORTED_LOCATION_MINSIZEREL "${sodium_DLL_RELEASE}"
    284                 IMPORTED_LOCATION_RELEASE "${sodium_DLL_RELEASE}"
    285             )
    286         endif()
    287     endif()
    288 endif()
    289