diff -Nru cmake-2.8.12/debian/changelog cmake-2.8.12/debian/changelog
--- cmake-2.8.12/debian/changelog	2013-10-31 08:46:45.000000000 -0400
+++ cmake-2.8.12/debian/changelog	2013-11-05 10:14:07.000000000 -0500
@@ -1,3 +1,10 @@
+cmake (2.8.12-0ubuntu2) UNRELEASED; urgency=low
+
+  * Imported upstream fix to resolve FTBFS in projects using linker flags
+    (lp: #1247787).
+
+ -- Stephen M. Webb <stephen.webb@canonical.com>  Tue, 05 Nov 2013 10:13:10 -0500
+
 cmake (2.8.12-0ubuntu1) trusty; urgency=low
 
   * New upstream release LP: #1246701
diff -Nru cmake-2.8.12/debian/patches/series cmake-2.8.12/debian/patches/series
--- cmake-2.8.12/debian/patches/series	2013-10-10 06:54:37.000000000 -0400
+++ cmake-2.8.12/debian/patches/series	2013-11-05 10:10:33.000000000 -0500
@@ -4,3 +4,4 @@
 multiarch-python-include-dirs.diff
 qt_import_dir_variable.diff
 boost-multiarch.patch
+valid-interface-link-libraries.patch
diff -Nru cmake-2.8.12/debian/patches/valid-interface-link-libraries.patch cmake-2.8.12/debian/patches/valid-interface-link-libraries.patch
--- cmake-2.8.12/debian/patches/valid-interface-link-libraries.patch	1969-12-31 19:00:00.000000000 -0500
+++ cmake-2.8.12/debian/patches/valid-interface-link-libraries.patch	2013-11-05 10:11:53.000000000 -0500
@@ -0,0 +1,95 @@
+From: Stephen Kelly <steveire@gmail.com>
+Date: Sun, 20 Oct 2013 20:39:16 +0200
+Bug-Ubuntu: https://bugs.launchpad.net/ubuntu/+source/cmake/+bug/1247787
+Subject: [PATCH] Don't add invalid content to static lib INTERFACE_LINK_LIBRARIES.
+
+Only valid target names or generator expressions may appear in
+the target field of a LINK_ONLY expression.
+
+Other content like link flags should still be added to that property
+(wrapped in config-specific generator expressions), but not wrapped
+in LINK_ONLY. Otherwise undue warnings would be issued for the
+policy CMP0022.
+
+The LINK_ONLY expression only has an effect for actual target
+names anyway, so there is no logical deficit.
+---
+ Source/cmTarget.cxx                                |   15 ++++++++++-----
+ Source/cmTargetLinkLibrariesCommand.cxx            |   11 ++++++++---
+ .../target_link_libraries/cmp0022/CMakeLists.txt   |    3 +++
+ Tests/RunCMake/CMP0022/CMP0022-NOWARN-static.cmake |    6 +++++-
+ 4 files changed, 26 insertions(+), 9 deletions(-)
+
+--- a/Source/cmTarget.cxx
++++ b/Source/cmTarget.cxx
+@@ -2331,15 +2331,20 @@
+   i += this->PrevLinkedLibraries.size();
+   for( ; i != libs.end(); ++i )
+     {
++    const char *lib = i->first.c_str();
+     // We call this so that the dependencies get written to the cache
+-    this->AddLinkLibrary( mf, selfname, i->first.c_str(), i->second );
++    this->AddLinkLibrary( mf, selfname, lib, i->second );
+ 
+     if (this->GetType() == cmTarget::STATIC_LIBRARY)
+       {
+-      this->AppendProperty("INTERFACE_LINK_LIBRARIES",
+-            ("$<LINK_ONLY:" +
+-            this->GetDebugGeneratorExpressions(i->first.c_str(), i->second) +
+-            ">").c_str());
++      std::string configLib = this->GetDebugGeneratorExpressions(lib,
++                                                                 i->second);
++      if (cmGeneratorExpression::IsValidTargetName(lib)
++          || cmGeneratorExpression::Find(lib) != std::string::npos)
++        {
++        configLib = "$<LINK_ONLY:" + configLib + ">";
++        }
++        this->AppendProperty("INTERFACE_LINK_LIBRARIES", configLib.c_str());
+       }
+     }
+   this->PrevLinkedLibraries = libs;
+--- a/Source/cmTargetLinkLibrariesCommand.cxx
++++ b/Source/cmTargetLinkLibrariesCommand.cxx
+@@ -384,10 +384,15 @@
+       {
+       if (this->Target->GetType() == cmTarget::STATIC_LIBRARY)
+         {
++        std::string configLib = this->Target
++                                     ->GetDebugGeneratorExpressions(lib, llt);
++        if (cmGeneratorExpression::IsValidTargetName(lib)
++            || cmGeneratorExpression::Find(lib) != std::string::npos)
++          {
++          configLib = "$<LINK_ONLY:" + configLib + ">";
++          }
+         this->Target->AppendProperty("INTERFACE_LINK_LIBRARIES",
+-                  ("$<LINK_ONLY:" +
+-                  this->Target->GetDebugGeneratorExpressions(lib, llt) +
+-                  ">").c_str());
++                                     configLib.c_str());
+         }
+       // Not a 'public' or 'interface' library. Do not add to interface
+       // property.
+--- a/Tests/CMakeCommands/target_link_libraries/cmp0022/CMakeLists.txt
++++ b/Tests/CMakeCommands/target_link_libraries/cmp0022/CMakeLists.txt
+@@ -22,6 +22,9 @@
+ add_library(staticlib2 STATIC staticlib2.cpp)
+ generate_export_header(staticlib2)
+ target_link_libraries(staticlib1 LINK_PUBLIC staticlib2)
++if (CMAKE_CXX_COMPILER_ID MATCHES GNU OR CMAKE_CXX_COMPILER_ID MATCHES Clang)
++  target_link_libraries(staticlib1 LINK_PRIVATE "-Wl,-v")
++endif()
+ 
+ add_executable(staticlib_exe staticlib_exe.cpp)
+ target_link_libraries(staticlib_exe staticlib1)
+--- a/Tests/RunCMake/CMP0022/CMP0022-NOWARN-static.cmake
++++ b/Tests/RunCMake/CMP0022/CMP0022-NOWARN-static.cmake
+@@ -5,4 +5,8 @@
+ add_library(bar STATIC empty_vs6_2.cpp)
+ add_library(bat STATIC empty_vs6_3.cpp)
+ target_link_libraries(foo bar)
+-target_link_libraries(bar bat)
++# The last element here needs to contain a space so that it is a single
++# element which is not a valid target name. As bar is a STATIC library,
++# this tests that the LINK_ONLY generator expression is not used for
++# that element, creating an error.
++target_link_libraries(bar bat "-lz -lm")