GetPrerequisites: remove needless variable dereferencing

Modules/GetPrerequisites.cmake

@@ -179,7 +179,7 @@ function(gp_append_unique list_var value)
   set(contains 0)
 
   foreach(item ${${list_var}})
-    if("${item}" STREQUAL "${value}")
+    if(item STREQUAL "${value}")
       set(contains 1)
       break()
     endif()
@@ -546,14 +546,14 @@ function(gp_resolved_file_type original_file file exepath dirs type_var)
     if(NOT is_system)
       get_filename_component(original_path "${original_lower}" PATH)
       get_filename_component(path "${lower}" PATH)
-      if("${original_path}" STREQUAL "${path}")
+      if(original_path STREQUAL path)
         set(is_local 1)
       else()
         string(LENGTH "${original_path}/" original_length)
         string(LENGTH "${lower}" path_length)
         if(${path_length} GREATER ${original_length})
           string(SUBSTRING "${lower}" 0 ${original_length} path)
-          if("${original_path}/" STREQUAL "${path}")
+          if("${original_path}/" STREQUAL path)
             set(is_embedded 1)
           endif()
         endif()
@@ -642,7 +642,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
   # Try to choose the right tool by default. Caller can set gp_tool prior to
   # calling this function to force using a different tool.
   #
-  if("${gp_tool}" STREQUAL "")
+  if(NOT gp_tool)
     set(gp_tool "ldd")
 
     if(APPLE)
@@ -668,7 +668,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
 
   set(gp_tool_known 0)
 
-  if("${gp_tool}" STREQUAL "ldd")
+  if(gp_tool STREQUAL "ldd")
     set(gp_cmd_args "")
     set(gp_regex "^[\t ]*[^\t ]+ => ([^\t\(]+) .*${eol_char}$")
     set(gp_regex_error "not found${eol_char}$")
@@ -677,7 +677,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
     set(gp_tool_known 1)
   endif()
 
-  if("${gp_tool}" STREQUAL "otool")
+  if(gp_tool STREQUAL "otool")
     set(gp_cmd_args "-L")
     set(gp_regex "^\t([^\t]+) \\(compatibility version ([0-9]+.[0-9]+.[0-9]+), current version ([0-9]+.[0-9]+.[0-9]+)\\)${eol_char}$")
     set(gp_regex_error "")
@@ -686,7 +686,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
     set(gp_tool_known 1)
   endif()
 
-  if("${gp_tool}" STREQUAL "dumpbin")
+  if(gp_tool STREQUAL "dumpbin")
     set(gp_cmd_args "/dependents")
     set(gp_regex "^    ([^ ].*[Dd][Ll][Ll])${eol_char}$")
     set(gp_regex_error "")
@@ -695,7 +695,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
     set(gp_tool_known 1)
   endif()
 
-  if("${gp_tool}" STREQUAL "objdump")
+  if(gp_tool STREQUAL "objdump")
     set(gp_cmd_args "-p")
     set(gp_regex "^\t*DLL Name: (.*\\.[Dd][Ll][Ll])${eol_char}$")
     set(gp_regex_error "")
@@ -712,7 +712,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
   endif()
 
 
-  if("${gp_tool}" STREQUAL "dumpbin")
+  if(gp_tool STREQUAL "dumpbin")
     # When running dumpbin, it also needs the "Common7/IDE" directory in the
     # PATH. It will already be in the PATH if being run from a Visual Studio
     # command prompt. Add it to the PATH here in case we are running from a
@@ -727,7 +727,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
       set(gp_found_cmd_dlls_dir 0)
       file(TO_CMAKE_PATH "$ENV{PATH}" env_path)
       foreach(gp_env_path_element ${env_path})
-        if("${gp_env_path_element}" STREQUAL "${gp_cmd_dlls_dir}")
+        if(gp_env_path_element STREQUAL gp_cmd_dlls_dir)
           set(gp_found_cmd_dlls_dir 1)
         endif()
       endforeach()
@@ -741,7 +741,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
   #
   # </setup-gp_tool-vars>
 
-  if("${gp_tool}" STREQUAL "ldd")
+  if(gp_tool STREQUAL "ldd")
     set(old_ld_env "$ENV{LD_LIBRARY_PATH}")
     set(new_ld_env "${exepath}")
     foreach(dir ${dirs})
@@ -763,7 +763,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
     OUTPUT_VARIABLE gp_cmd_ov
     )
 
-  if("${gp_tool}" STREQUAL "ldd")
+  if(gp_tool STREQUAL "ldd")
     set(ENV{LD_LIBRARY_PATH} "${old_ld_env}")
   endif()
 
@@ -783,7 +783,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
   # check for install id and remove it from list, since otool -L can include a
   # reference to itself
   set(gp_install_id)
-  if("${gp_tool}" STREQUAL "otool")
+  if(gp_tool STREQUAL "otool")
     execute_process(
       COMMAND otool -D ${target}
       OUTPUT_VARIABLE gp_install_id_ov
@@ -833,7 +833,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
     #
     set(add_item 1)
 
-    if("${item}" STREQUAL "${gp_install_id}")
+    if(item STREQUAL gp_install_id)
       set(add_item 0)
     endif()
 
@@ -841,7 +841,7 @@ function(get_prerequisites target prerequisites_var exclude_system recurse exepa
       set(type "")
       gp_resolved_file_type("${target}" "${item}" "${exepath}" "${dirs}" type "${rpaths}")
 
-      if("${type}" STREQUAL "system")
+      if(type STREQUAL "system")
         set(add_item 0)
       endif()
     endif()