-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

1 files changed, 138 insertions, 0 deletions

diff --git a/modules/CMakeParseArguments.cmake b/modules/CMakeParseArguments.cmake
new file mode 100644
index 00000000..7ce4c49a
--- /dev/null
+++ b/modules/CMakeParseArguments.cmake
@@ -0,0 +1,138 @@
+# CMAKE_PARSE_ARGUMENTS(<prefix> <options> <one_value_keywords> <multi_value_keywords> args...)
+#
+# CMAKE_PARSE_ARGUMENTS() is intended to be used in macros or functions for
+# parsing the arguments given to that macro or function.
+# It processes the arguments and defines a set of variables which hold the
+# values of the respective options.
+#
+# The <options> argument contains all options for the respective macro,
+# i.e. keywords which can be used when calling the macro without any value
+# following, like e.g. the OPTIONAL keyword of the install() command.
+#
+# The <one_value_keywords> argument contains all keywords for this macro
+# which are followed by one value, like e.g. DESTINATION keyword of the
+# install() command.
+#
+# The <multi_value_keywords> argument contains all keywords for this macro
+# which can be followed by more than one value, like e.g. the TARGETS or
+# FILES keywords of the install() command.
+#
+# When done, CMAKE_PARSE_ARGUMENTS() will have defined for each of the
+# keywords listed in <options>, <one_value_keywords> and
+# <multi_value_keywords> a variable composed of the given <prefix>
+# followed by "_" and the name of the respective keyword.
+# These variables will then hold the respective value from the argument list.
+# For the <options> keywords this will be TRUE or FALSE.
+#
+# All remaining arguments are collected in a variable
+# <prefix>_UNPARSED_ARGUMENTS, this can be checked afterwards to see whether
+# your macro was called with unrecognized parameters.
+#
+# As an example here a my_install() macro, which takes similar arguments as the
+# real install() command:
+#
+#   function(MY_INSTALL)
+#     set(options OPTIONAL FAST)
+#     set(oneValueArgs DESTINATION RENAME)
+#     set(multiValueArgs TARGETS CONFIGURATIONS)
+#     cmake_parse_arguments(MY_INSTALL "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN} )
+#     ...
+#
+# Assume my_install() has been called like this:
+#   my_install(TARGETS foo bar DESTINATION bin OPTIONAL blub)
+#
+# After the cmake_parse_arguments() call the macro will have set the following
+# variables:
+#   MY_INSTALL_OPTIONAL = TRUE
+#   MY_INSTALL_FAST = FALSE (this option was not used when calling my_install()
+#   MY_INSTALL_DESTINATION = "bin"
+#   MY_INSTALL_RENAME = "" (was not used)
+#   MY_INSTALL_TARGETS = "foo;bar"
+#   MY_INSTALL_CONFIGURATIONS = "" (was not used)
+#   MY_INSTALL_UNPARSED_ARGUMENTS = "blub" (no value expected after "OPTIONAL"
+#
+# You can the continue and process these variables.
+#
+# Keywords terminate lists of values, e.g. if directly after a one_value_keyword
+# another recognized keyword follows, this is interpreted as the beginning of
+# the new option.
+# E.g. my_install(TARGETS foo DESTINATION OPTIONAL) would result in
+# MY_INSTALL_DESTINATION set to "OPTIONAL", but MY_INSTALL_DESTINATION would
+# be empty and MY_INSTALL_OPTIONAL would be set to TRUE therefor.
+
+#=============================================================================
+# Copyright 2010 Alexander Neundorf <neundorf@kde.org>
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+
+if(__CMAKE_PARSE_ARGUMENTS_INCLUDED)
+  return()
+endif()
+set(__CMAKE_PARSE_ARGUMENTS_INCLUDED TRUE)
+
+
+function(CMAKE_PARSE_ARGUMENTS prefix _optionNames _singleArgNames _multiArgNames)
+  # first set all result variables to empty/FALSE
+  foreach(arg_name ${_singleArgNames} ${_multiArgNames})
+    set(${prefix}_${arg_name})
+  endforeach(arg_name)
+
+  foreach(option ${_optionNames})
+    set(${prefix}_${option} FALSE)
+  endforeach(option)
+
+  set(${prefix}_UNPARSED_ARGUMENTS)
+
+  set(insideValues FALSE)
+  set(currentArgName)
+
+  # now iterate over all arguments and fill the result variables
+  foreach(currentArg ${ARGN})
+    list(FIND _optionNames "${currentArg}" optionIndex)  # ... then this marks the end of the arguments belonging to this keyword
+    list(FIND _singleArgNames "${currentArg}" singleArgIndex)  # ... then this marks the end of the arguments belonging to this keyword
+    list(FIND _multiArgNames "${currentArg}" multiArgIndex)  # ... then this marks the end of the arguments belonging to this keyword
+
+    if(${optionIndex} EQUAL -1  AND  ${singleArgIndex} EQUAL -1  AND  ${multiArgIndex} EQUAL -1)
+      if(insideValues)
+        if("${insideValues}" STREQUAL "SINGLE")
+          set(${prefix}_${currentArgName} ${currentArg})
+          set(insideValues FALSE)
+        elseif("${insideValues}" STREQUAL "MULTI")
+          list(APPEND ${prefix}_${currentArgName} ${currentArg})
+        endif()
+      else(insideValues)
+        list(APPEND ${prefix}_UNPARSED_ARGUMENTS ${currentArg})
+      endif(insideValues)
+    else()
+      if(NOT ${optionIndex} EQUAL -1)
+        set(${prefix}_${currentArg} TRUE)
+        set(insideValues FALSE)
+      elseif(NOT ${singleArgIndex} EQUAL -1)
+        set(currentArgName ${currentArg})
+        set(${prefix}_${currentArgName})
+        set(insideValues "SINGLE")
+      elseif(NOT ${multiArgIndex} EQUAL -1)
+        set(currentArgName ${currentArg})
+        set(${prefix}_${currentArgName})
+        set(insideValues "MULTI")
+      endif()
+    endif()
+
+  endforeach(currentArg)
+
+  # propagate the result variables to the caller:
+  foreach(arg_name ${_singleArgNames} ${_multiArgNames} ${_optionNames})
+    set(${prefix}_${arg_name}  ${${prefix}_${arg_name}} PARENT_SCOPE)
+  endforeach(arg_name)
+  set(${prefix}_UNPARSED_ARGUMENTS ${${prefix}_UNPARSED_ARGUMENTS} PARENT_SCOPE)
+
+endfunction(CMAKE_PARSE_ARGUMENTS _options _singleArgs _multiArgs)