1 files changed, 48 insertions, 0 deletions
diff --git a/modules/MacroOptionalFindPackage.cmake b/modules/MacroOptionalFindPackage.cmake
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+++ b/modules/MacroOptionalFindPackage.cmake
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+# - MACRO_OPTIONAL_FIND_PACKAGE() combines FIND_PACKAGE() with an OPTION()
+# MACRO_OPTIONAL_FIND_PACKAGE( <name> [QUIT] )
+# This macro is a combination of OPTION() and FIND_PACKAGE(), it
+# works like FIND_PACKAGE(), but additionally it automatically creates
+# an option name WITH_<name>, which can be disabled via the cmake GUI.
+# or via -DWITH_<name>=OFF
+# The standard <name>_FOUND variables can be used in the same way
+# as when using the normal FIND_PACKAGE()
+
+# Copyright (c) 2006-2010 Alexander Neundorf, <neundorf@kde.org>
+#
+# Redistribution and use is allowed according to the terms of the BSD license.
+# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
+
+# This is just a helper macro to set a bunch of variables empty.
+# We don't know whether the package uses UPPERCASENAME or CamelCaseName, so we try both:
+macro(_MOFP_SET_EMPTY_IF_DEFINED _name _var)
+   if(DEFINED ${_name}_${_var})
+      set(${_name}_${_var} "")
+   endif(DEFINED ${_name}_${_var})
+
+   string(TOUPPER ${_name} _nameUpper)
+   if(DEFINED ${_nameUpper}_${_var})
+      set(${_nameUpper}_${_var}  "")
+   endif(DEFINED ${_nameUpper}_${_var})
+endmacro(_MOFP_SET_EMPTY_IF_DEFINED _package _var)
+
+
+macro (MACRO_OPTIONAL_FIND_PACKAGE _name )
+   option(WITH_${_name} "Search for ${_name} package" ON)
+   if (WITH_${_name})
+      find_package(${_name} ${ARGN})
+   else (WITH_${_name})
+      string(TOUPPER ${_name} _nameUpper)
+      set(${_name}_FOUND FALSE)
+      set(${_nameUpper}_FOUND FALSE)
+
+      _mofp_set_empty_if_defined(${_name} INCLUDE_DIRS)
+      _mofp_set_empty_if_defined(${_name} INCLUDE_DIR)
+      _mofp_set_empty_if_defined(${_name} INCLUDES)
+      _mofp_set_empty_if_defined(${_name} LIBRARY)
+      _mofp_set_empty_if_defined(${_name} LIBRARIES)
+      _mofp_set_empty_if_defined(${_name} LIBS)
+      _mofp_set_empty_if_defined(${_name} FLAGS)
+      _mofp_set_empty_if_defined(${_name} DEFINITIONS)
+   endif (WITH_${_name})
+endmacro (MACRO_OPTIONAL_FIND_PACKAGE)
+