cmake: fix libname for pkg-config configuration

cmake/OpenCVGenPkgconfig.cmake

@@ -74,8 +74,8 @@ if(OpenCV_EXTRA_COMPONENTS)
       list(APPEND OpenCV_LIB_COMPONENTS_ "${extra_component}")
     elseif(extra_component MATCHES "[\\/]")
       get_filename_component(libdir "${extra_component}" PATH)
-      get_filename_component(libname "${extra_component}" NAME_WE)
-      string(REGEX REPLACE "^lib" "" libname "${libname}")
+      get_filename_component(libname "${extra_component}" NAME)
+      ocv_get_libname(libname "${libname}")
       list(APPEND OpenCV_LIB_COMPONENTS_ "-L${libdir}" "-l${libname}")
     else()
       list(APPEND OpenCV_LIB_COMPONENTS_ "-l${extra_component}")

cmake/OpenCVUtils.cmake

@@ -749,6 +749,12 @@ function(ocv_source_group group)
   source_group(${group} FILES ${srcs})
 endfunction()
 
+macro(ocv_get_libname var_name)
+  get_filename_component(__libname "${ARGN}" NAME)
+  string(REGEX REPLACE "^lib(.+).(a|so)(.[.0-9]+)?$" "\\1" __libname "${__libname}")
+  set(${var_name} "${__libname}")
+endmacro()
+
 # build the list of simple dependencies, that links via "-l"
 #  _all_libs - name of variable with input list
 #  _simple - name of variable with output list of simple libs