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authorBrad King <brad.king@kitware.com>2006-10-19 18:48:12 (GMT)
committerBrad King <brad.king@kitware.com>2006-10-19 18:48:12 (GMT)
commitde007ef199190c84c0f53ac106c282fc190f5df1 (patch)
tree4764a0d373c634c109db8b5484524b673b7a1d81 /Modules
parentb646183f441bcc3c9f3b094defbe71a3b56a60a3 (diff)
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ENH: Adding CMAKE_DEPENDENT_OPTION macro.
Diffstat (limited to 'Modules')
-rw-r--r--Modules/CMakeDependentOption.cmake37
1 files changed, 37 insertions, 0 deletions
diff --git a/Modules/CMakeDependentOption.cmake b/Modules/CMakeDependentOption.cmake
new file mode 100644
index 0000000..2183191
--- /dev/null
+++ b/Modules/CMakeDependentOption.cmake
@@ -0,0 +1,37 @@
+# - Macro to provide an option dependent on other options.
+# This macro presents an option to the user only if a set of other
+# conditions are true. When the option is not presented a default
+# value is used, but any value set by the user is preserved for when
+# the option is presented again.
+# Example invocation:
+# CMAKE_DEPENDENT_OPTION(USE_FOO "Use Foo" ON
+# "USE_BAR;NOT USE_ZOT" OFF)
+# If USE_BAR is true and USE_ZOT is false, this provides an option called
+# USE_FOO that defaults to ON. Otherwise, it sets USE_FOO to OFF. If
+# the status of USE_BAR or USE_ZOT ever changes, any value for the
+# USE_FOO option is saved so that when the option is re-enabled it
+# retains its old value.
+MACRO(CMAKE_DEPENDENT_OPTION option doc default depends force)
+ IF(${option}_ISSET MATCHES "^${option}_ISSET$")
+ SET(${option}_AVAILABLE 1)
+ FOREACH(d ${depends})
+ STRING(REGEX REPLACE " +" ";" CMAKE_DEPENDENT_OPTION_DEP "${d}")
+ IF(${CMAKE_DEPENDENT_OPTION_DEP})
+ ELSE(${CMAKE_DEPENDENT_OPTION_DEP})
+ SET(${option}_AVAILABLE 0)
+ ENDIF(${CMAKE_DEPENDENT_OPTION_DEP})
+ ENDFOREACH(d)
+ IF(${option}_AVAILABLE)
+ OPTION(${option} "${doc}" "${default}")
+ SET(${option} "${${option}}" CACHE BOOL "${doc}" FORCE)
+ ELSE(${option}_AVAILABLE)
+ IF(${option} MATCHES "^${option}$")
+ ELSE(${option} MATCHES "^${option}$")
+ SET(${option} "${${option}}" CACHE INTERNAL "${doc}")
+ ENDIF(${option} MATCHES "^${option}$")
+ SET(${option} ${force})
+ ENDIF(${option}_AVAILABLE)
+ ELSE(${option}_ISSET MATCHES "^${option}_ISSET$")
+ SET(${option} "${${option}_ISSET}")
+ ENDIF(${option}_ISSET MATCHES "^${option}_ISSET$")
+ENDMACRO(CMAKE_DEPENDENT_OPTION)