diff --git a/Help/manual/cmake-toolchains.7.rst b/Help/manual/cmake-toolchains.7.rst
index f233d0884a..e8badd4b87 100644
--- a/Help/manual/cmake-toolchains.7.rst
+++ b/Help/manual/cmake-toolchains.7.rst
@@ -233,6 +233,9 @@ value to those supported compilers when compiling:
   set(CMAKE_CXX_COMPILER QCC)
   set(CMAKE_CXX_COMPILER_TARGET ${arch})
 
+  set(CMAKE_SYSROOT $ENV{QNX_TARGET})
+
+
 Cross Compiling for Windows CE
 ------------------------------
 
diff --git a/Modules/CMakeDetermineCompilerABI.cmake b/Modules/CMakeDetermineCompilerABI.cmake
index c5611b5be4..99447e41eb 100644
--- a/Modules/CMakeDetermineCompilerABI.cmake
+++ b/Modules/CMakeDetermineCompilerABI.cmake
@@ -161,6 +161,18 @@ function(CMAKE_DETERMINE_COMPILER_ABI lang src)
             break()
           endif()
         endforeach()
+      elseif(CMAKE_CXX_COMPILER_ID STREQUAL QCC)
+        foreach(dir ${implicit_dirs})
+          if (dir MATCHES "/lib$")
+            get_filename_component(assumedArchDir "${dir}" DIRECTORY)
+            get_filename_component(archParentDir "${assumedArchDir}" DIRECTORY)
+            if (archParentDir STREQUAL CMAKE_SYSROOT)
+              get_filename_component(archDirName "${assumedArchDir}" NAME)
+              set(CMAKE_${lang}_LIBRARY_ARCHITECTURE "${archDirName}" PARENT_SCOPE)
+              break()
+            endif()
+          endif()
+        endforeach()
       endif()
 
     else()
diff --git a/Modules/Compiler/QCC.cmake b/Modules/Compiler/QCC.cmake
index 9df826909a..10e138918c 100644
--- a/Modules/Compiler/QCC.cmake
+++ b/Modules/Compiler/QCC.cmake
@@ -10,6 +10,9 @@ macro(__compiler_qcc lang)
   # http://www.qnx.com/developers/docs/6.4.0/neutrino/utilities/q/qcc.html#examples
   set(CMAKE_${lang}_COMPILE_OPTIONS_TARGET "-V")
 
+  set(CMAKE_PREFIX_LIBRARY_ARCHITECTURE "ON")
+
+  set(CMAKE_${lang}_COMPILE_OPTIONS_SYSROOT "-Wc,-isysroot,")
   set(CMAKE_INCLUDE_SYSTEM_FLAG_${lang} "-Wp,-isystem,")
   set(CMAKE_DEPFILE_FLAGS_${lang} "-Wp,-MD,<DEPFILE> -Wp,-MT,<OBJECT> -Wp,-MF,<DEPFILE>")
 
diff --git a/Source/cmSearchPath.cxx b/Source/cmSearchPath.cxx
index d15ce57499..766d3478b3 100644
--- a/Source/cmSearchPath.cxx
+++ b/Source/cmSearchPath.cxx
@@ -181,7 +181,13 @@ void cmSearchPath::AddPrefixPaths(const std::vector<std::string>& paths,
       const char* arch =
         this->FC->Makefile->GetDefinition("CMAKE_LIBRARY_ARCHITECTURE");
       if (arch && *arch) {
-        this->AddPathInternal(dir + subdir + "/" + arch, base);
+        if (this->FC->Makefile->IsDefinitionSet("CMAKE_SYSROOT") &&
+            this->FC->Makefile->IsDefinitionSet(
+              "CMAKE_PREFIX_LIBRARY_ARCHITECTURE")) {
+          this->AddPathInternal(cmStrCat('/', arch, dir, subdir), base);
+        } else {
+          this->AddPathInternal(cmStrCat(dir, subdir, '/', arch), base);
+        }
       }
     }
     std::string add = dir + subdir;