Fix libtomcrypt detection in CMake

Author: AMDmi3

CMakeLists.txt

@@ -296,7 +296,12 @@ else()
 
     option(WITH_LIBTOMCRYPT "Use system LibTomCrypt library" OFF)
     if(WITH_LIBTOMCRYPT)
-        set(LINK_LIBS ${LINK_LIBS} tomcrypt)
+        include(FindPkgConfig)
+        pkg_check_modules(PC_LIBTOMCRYPT libtomcrypt REQUIRED)
+        find_path(LIBTOMCRYPT_INCLUDE_DIR NAMES tomcrypt.h HINTS ${PC_LIBTOMCRYPT_INCLUDE_DIRS} REQUIRED)
+        find_library(LIBTOMCRYPT_LIBRARY NAMES tomcrypt HINTS ${PC_LIBTOMCRYPT_LIBRARY_DIRS} REQUIRED)
+        set(LINK_LIBS ${LINK_LIBS} ${LIBTOMCRYPT_LIBRARY})
+        include_directories(${LIBTOMCRYPT_INCLUDE_DIR})
     else()
         set(SRC_ADDITIONAL_FILES ${TOMCRYPT_FILES} ${TOMMATH_FILES})
     endif()