From 13878c79535651b151b80526f6052904c4189023 Mon Sep 17 00:00:00 2001
From: Alexander Neundorf <neundorf@kde.org>
Date: Wed, 25 Aug 2010 20:06:48 +0000
Subject: -sync FindPackageHandleStandardArgs.cmake with the version from cmake
 master, in order to stay compatible with future cmake releases.

Our FindPackageHandleStandardArgs.cmake had automatic check for the version number by guessing
the name of the variable which contains the version number. This didn't make it into cmake, but
instead an extendible version where you can specify what you want.

FindEigen2.cmake is already converted, it looks like this:

find_package_handle_standard_args(Eigen2 REQUIRED_VARS EIGEN2_INCLUDE_DIR
                                         VERSION_VAR EIGEN2_VERSION)

Additionally a FAIL_MESSAGE can be specified. VERSION_VAR is optional.

This must be merged in the 4.5. branch if we don't find any issues.


Alex

CCMAIL: kde-buildsystem@kde.org


svn path=/trunk/KDE/kdelibs/; revision=1167973
---
 modules/FindEigen2.cmake | 41 ++++++++---------------------------------
 1 file changed, 8 insertions(+), 33 deletions(-)

(limited to 'modules/FindEigen2.cmake')

diff --git a/modules/FindEigen2.cmake b/modules/FindEigen2.cmake
index 0e86aaf2..83949e99 100644
--- a/modules/FindEigen2.cmake
+++ b/modules/FindEigen2.cmake
@@ -15,20 +15,14 @@
 # Redistribution and use is allowed according to the terms of the BSD license.
 
 if(NOT Eigen2_FIND_VERSION)
-  if(NOT Eigen2_FIND_VERSION_MAJOR)
-    set(Eigen2_FIND_VERSION_MAJOR 2)
-  endif(NOT Eigen2_FIND_VERSION_MAJOR)
-  if(NOT Eigen2_FIND_VERSION_MINOR)
-    set(Eigen2_FIND_VERSION_MINOR 0)
-  endif(NOT Eigen2_FIND_VERSION_MINOR)
-  if(NOT Eigen2_FIND_VERSION_PATCH)
-    set(Eigen2_FIND_VERSION_PATCH 0)
-  endif(NOT Eigen2_FIND_VERSION_PATCH)
+  set(Eigen2_FIND_VERSION_MAJOR 2)
+  set(Eigen2_FIND_VERSION_MINOR 0)
+  set(Eigen2_FIND_VERSION_PATCH 0)
 
   set(Eigen2_FIND_VERSION "${Eigen2_FIND_VERSION_MAJOR}.${Eigen2_FIND_VERSION_MINOR}.${Eigen2_FIND_VERSION_PATCH}")
 endif(NOT Eigen2_FIND_VERSION)
 
-macro(_eigen2_check_version)
+macro(_eigen2_get_version)
   file(READ "${EIGEN2_INCLUDE_DIR}/Eigen/src/Core/util/Macros.h" _eigen2_version_header LIMIT 5000 OFFSET 1000)
 
   string(REGEX MATCH "define *EIGEN_WORLD_VERSION ([0-9]*)" _eigen2_world_version_match "${_eigen2_version_header}")
@@ -39,26 +33,7 @@ macro(_eigen2_check_version)
   set(EIGEN2_MINOR_VERSION "${CMAKE_MATCH_1}")
 
   set(EIGEN2_VERSION ${EIGEN2_WORLD_VERSION}.${EIGEN2_MAJOR_VERSION}.${EIGEN2_MINOR_VERSION})
-  if(${EIGEN2_VERSION} VERSION_LESS ${Eigen2_FIND_VERSION})
-    set(EIGEN2_VERSION_OK FALSE)
-  else(${EIGEN2_VERSION} VERSION_LESS ${Eigen2_FIND_VERSION})
-    set(EIGEN2_VERSION_OK TRUE)
-  endif(${EIGEN2_VERSION} VERSION_LESS ${Eigen2_FIND_VERSION})
-
-  if(NOT EIGEN2_VERSION_OK)
-  
-    message(STATUS "Eigen2 version ${EIGEN2_VERSION} found in ${EIGEN2_INCLUDE_DIR}, "
-                   "but at least version ${Eigen2_FIND_VERSION} is required")
-  endif(NOT EIGEN2_VERSION_OK)
-endmacro(_eigen2_check_version)
-
-if (EIGEN2_INCLUDE_DIR)
-
-  # in cache already
-  _eigen2_check_version()
-  set(EIGEN2_FOUND ${EIGEN2_VERSION_OK})
-
-else (EIGEN2_INCLUDE_DIR)
+endmacro(_eigen2_get_version)
 
 find_path(EIGEN2_INCLUDE_DIR NAMES Eigen/Core
      PATHS
@@ -68,13 +43,13 @@ find_path(EIGEN2_INCLUDE_DIR NAMES Eigen/Core
    )
 
 if(EIGEN2_INCLUDE_DIR)
-  _eigen2_check_version()
+  _eigen2_get_version()
 endif(EIGEN2_INCLUDE_DIR)
 
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(Eigen2 DEFAULT_MSG EIGEN2_INCLUDE_DIR EIGEN2_VERSION_OK)
+find_package_handle_standard_args(Eigen2 REQUIRED_VARS EIGEN2_INCLUDE_DIR
+                                         VERSION_VAR EIGEN2_VERSION)
 
 mark_as_advanced(EIGEN2_INCLUDE_DIR)
 
-endif(EIGEN2_INCLUDE_DIR)
 
-- 
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