1 files changed, 58 insertions, 0 deletions
diff --git a/cmake/Findlibsodium.cmake b/cmake/Findlibsodium.cmake
new file mode 100644
index 0000000..0844e74
--- /dev/null
+++ b/cmake/Findlibsodium.cmake
@@ -0,0 +1,58 @@
+find_package(PkgConfig)
+
+if(PKG_CONFIG_FOUND)
+    pkg_check_modules(libsodium libsodium)
+endif()
+
+if(NOT libsodium_FOUND)
+    find_library(libsodium_LIBRARIES NAMES sodium)
+    find_path(libsodium_INCLUDE_DIRS NAMES
+        sodium.h
+        sodium/version.h
+        PATH_SUFFIXES include)
+
+    if(libsodium_INCLUDE_DIRS)
+        set(libsodium_VERSION ${libsodium_INCLUDE_DIRS}/sodium/version.h)
+
+        if(NOT EXISTS ${libsodium_VERSION})
+            message(FATAL_ERROR "Missing file: ${libsodium_VERSION}")
+        endif()
+    endif()
+
+    file(STRINGS ${libsodium_VERSION} libsodium_VERSION_LINE REGEX "^#define[ \t]+SODIUM_VERSION_STRING[ \t]+\"[0-9\.]+\"$")
+    set(libsodium_expr "^#define[ \t]+SODIUM_VERSION_STRING[ \t]+\"([0-9]+)\.([0-9]+)\.([0-9]+)\"$")
+    string(REGEX REPLACE ${libsodium_expr} "\\1" libsodium_VERSION_MAJOR "${libsodium_VERSION_LINE}")
+    string(REGEX REPLACE ${libsodium_expr} "\\2" libsodium_VERSION_MINOR "${libsodium_VERSION_LINE}")
+    string(REGEX REPLACE ${libsodium_expr} "\\3" libsodium_VERSION_PATCH "${libsodium_VERSION_LINE}")
+    set(libsodium_VERSION_STRING ${libsodium_VERSION_MAJOR}.${libsodium_VERSION_MINOR}.${libsodium_VERSION_PATCH})
+    unset(libsodium_VERSION_MAJOR_LINE)
+    unset(libsodium_VERSION_MINOR_LINE)
+    unset(libsodium_VERSION_PATCH_LINE)
+    unset(libsodium_VERSION_MAJOR)
+    unset(libsodium_VERSION_MINOR)
+    unset(libsodium_VERSION_PATCH)
+    unset(libsodium_expr)
+
+    if (libsodium_LIBRARIES STREQUAL "libsodium_LIBRARIES-NOTFOUND")
+        message(FATAL_ERROR "libsodium not found")
+    elseif (libsodium_INCLUDE_DIRS STREQUAL "libsodium_INCLUDE_DIRS-NOTFOUND")
+        message(FATAL_ERROR "libsodium headers not found")
+    endif()
+
+    set(libsodium_LINK_LIBRARIES ${libsodium_LIBRARIES})
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(libsodium
+    REQUIRED_VARS
+        libsodium_LINK_LIBRARIES
+        libsodium_INCLUDE_DIRS
+    VERSION_VAR libsodium_VERSION_STRING
+)
+
+if(NOT TARGET libsodium)
+    add_library(libsodium INTERFACE IMPORTED)
+    set_target_properties(libsodium PROPERTIES
+        INTERFACE_INCLUDE_DIRECTORIES ${libsodium_INCLUDE_DIRS}
+        INTERFACE_LINK_LIBRARIES ${libsodium_LINK_LIBRARIES})
+endif()