1# Written in 2016 by Henrik Steffen Gaßmann <henrik@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
29if (CMAKE_C_COMPILER_ID STREQUAL "GNU"
30    OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
31    set(_GCC_COMPATIBLE 1)
32endif()
33
34# static library option
35if (NOT DEFINED sodium_USE_STATIC_LIBS)
36    option(sodium_USE_STATIC_LIBS "enable to statically link against sodium" OFF)
37endif()
38if(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")
45endif()
46
47
48########################################################################
49# UNIX
50if (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
93elseif (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 ${sodium_DIR}
196                PATH_SUFFIXES bin
197            )
198        endif()
199    else()
200        message(FATAL_ERROR "this platform is not supported by FindSodium.cmake")
201    endif()
202
203
204########################################################################
205# unsupported
206else()
207    message(FATAL_ERROR "this platform is not supported by FindSodium.cmake")
208endif()
209
210
211########################################################################
212# common stuff
213
214# extract sodium version
215if (sodium_INCLUDE_DIR)
216    set(_VERSION_HEADER "${_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()
223endif()
224
225# communicate results
226include(FindPackageHandleStandardArgs)
227find_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
237mark_as_advanced(sodium_INCLUDE_DIR)
238mark_as_advanced(sodium_LIBRARY_DEBUG)
239mark_as_advanced(sodium_LIBRARY_RELEASE)
240if (WIN32)
241    mark_as_advanced(sodium_DLL_DEBUG)
242    mark_as_advanced(sodium_DLL_RELEASE)
243endif()
244
245# create imported target
246if(sodium_USE_STATIC_LIBS)
247    set(_LIB_TYPE STATIC)
248else()
249    set(_LIB_TYPE SHARED)
250endif()
251add_library(sodium ${_LIB_TYPE} IMPORTED)
252
253set_target_properties(sodium PROPERTIES
254    INTERFACE_INCLUDE_DIRECTORIES "${sodium_INCLUDE_DIR}"
255    IMPORTED_LINK_INTERFACE_LANGUAGES "C"
256)
257
258if (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    )
264else()
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()
288endif()
289