Compare taglib version properly.
https://github.com/tomahawk-player/tomahawk/commit/ee4656383a92a78299aff6f8637f174fff328e98
--- cmake/modules/FindTaglib.cmake.orig	2009-03-13 16:40:24.000000000 -0500
+++ cmake/modules/FindTaglib.cmake	2016-09-26 02:55:48.000000000 -0500
@@ -29,10 +29,10 @@
 
   exec_program(${TAGLIBCONFIG_EXECUTABLE} ARGS --version RETURN_VALUE _return_VALUE OUTPUT_VARIABLE TAGLIB_VERSION)
 
-  if(TAGLIB_VERSION STRLESS "${TAGLIB_MIN_VERSION}")
+  if(TAGLIB_VERSION VERSION_LESS "${TAGLIB_MIN_VERSION}")
      message(STATUS "TagLib version not found: version searched :${TAGLIB_MIN_VERSION}, found ${TAGLIB_VERSION}")
      set(TAGLIB_FOUND FALSE)
-  else(TAGLIB_VERSION STRLESS "${TAGLIB_MIN_VERSION}")
+  else(TAGLIB_VERSION VERSION_LESS "${TAGLIB_MIN_VERSION}")
 
      exec_program(${TAGLIBCONFIG_EXECUTABLE} ARGS --libs RETURN_VALUE _return_VALUE OUTPUT_VARIABLE TAGLIB_LIBRARIES)
 
@@ -42,7 +42,7 @@
         set(TAGLIB_FOUND TRUE)
      endif(TAGLIB_LIBRARIES AND TAGLIB_CFLAGS)
      string(REGEX REPLACE " *-I" ";" TAGLIB_INCLUDES "${TAGLIB_CFLAGS}")
-  endif(TAGLIB_VERSION STRLESS "${TAGLIB_MIN_VERSION}") 
+  endif(TAGLIB_VERSION VERSION_LESS "${TAGLIB_MIN_VERSION}") 
   mark_as_advanced(TAGLIB_CFLAGS TAGLIB_LIBRARIES TAGLIB_INCLUDES)
 
 else(TAGLIBCONFIG_EXECUTABLE)