FindPkgConfig.cmake: properly set documented PKG_CONFIG_FOUND variable.

The patch backport_findpkgconfig_set_found_variable.diff was backported from
upstream 3ea850a.

(Closes: #669627)

debian/changelog

@@ -1,5 +1,7 @@
 cmake (2.8.8-2) UNRELEASED; urgency=low
 
+  * FindPkgConfig.cmake: properly set documented PKG_CONFIG_FOUND variable
+    (patch backport_findpkgconfig_set_found_variable.diff). (Closes: #669627)
 
  -- Modestas Vainius <modax@debian.org>  Sun, 29 Apr 2012 09:41:43 +0300
 

debian/patches/backport_findpkgconfig_set_found_variable.diff

@@ -0,0 +1,54 @@
+From: Rolf Eike Beer <eike@sf-mail.de>
+Date: Fri, 13 Apr 2012 08:50:49 +0200
+Subject: FindPkgConfig.cmake: fix documented output variable not set
+Origin: backport, commit:3ea850a5023060b84dcc0e6f0098c32c28b15807
+Bug: http://public.kitware.com/Bug/view.php?id=13125
+Bug-Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=669627
+Applied-Upstream: 2.8.9
+
+The real fix is from Yury G. Kudryashov while I added the surrounding cleanups.
+An additional hint to really get this fixed came from Rex Dieter.
+
+--- a/Modules/FindPkgConfig.cmake
++++ b/Modules/FindPkgConfig.cmake
+@@ -13,11 +13,10 @@
+ # When the 'QUIET' argument is set, no status messages will be printed.
+ #
+ # It sets the following variables:
+-#   PKG_CONFIG_FOUND          ... true if pkg-config works on the system
++#   PKG_CONFIG_FOUND          ... if pkg-config executable was found
+ #   PKG_CONFIG_EXECUTABLE     ... pathname of the pkg-config program
+ #   PKG_CONFIG_VERSION_STRING ... the version of the pkg-config program found
+ #                                 (since CMake 2.8.8)
+-#   PKG_CONFIG_FOUND          ... if pkg-config executable was found
+ #
+ # For the following variables two sets of values exist; first one is the
+ # common one and has the given PREFIX. The second set contains flags
+@@ -104,6 +103,11 @@ find_package_handle_standard_args(PkgCon
+                                   REQUIRED_VARS PKG_CONFIG_EXECUTABLE
+                                   VERSION_VAR PKG_CONFIG_VERSION_STRING)
+ 
++# This is needed because the module name is "PkgConfig" but the name of
++# this variable has always been PKG_CONFIG_FOUND so this isn't automatically
++# handled by FPHSA.
++set(PKG_CONFIG_FOUND "${PKGCONFIG_FOUND}")
++
+ # Unsets the given variables
+ macro(_pkgconfig_unset var)
+   set(${var} "" CACHE INTERNAL "")
+--- a/Tests/CMakeOnly/AllFindModules/CMakeLists.txt
++++ b/Tests/CMakeOnly/AllFindModules/CMakeLists.txt
+@@ -71,7 +71,7 @@ endmacro(check_version_string)
+ # reported.
+ 
+ foreach(VTEST ALSA ARMADILLO BZIP2 CUPS CURL EXPAT FREETYPE GETTEXT GIT HSPELL
+-        JASPER LIBXML2 LIBXSLT PERL PostgreSQL TIFF ZLIB)
++        JASPER LIBXML2 LIBXSLT PERL PKG_CONFIG PostgreSQL TIFF ZLIB)
+     check_version_string(${VTEST} ${VTEST}_VERSION_STRING)
+ endforeach(VTEST)
+ 
+@@ -82,4 +82,3 @@ endforeach(VTEST)
+ 
+ check_version_string(PYTHONINTERP PYTHON_VERSION_STRING)
+ check_version_string(SUBVERSION Subversion_VERSION_SVN)
+-check_version_string(PKGCONFIG PKG_CONFIG_VERSION_STRING)

debian/patches/series

@@ -1,3 +1,4 @@
 FindBoost_add_-lpthread_#563479.diff
 multiarch_findgtk2_fix.diff
 manpage_fixes.diff
+backport_findpkgconfig_set_found_variable.diff