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UseJava.cmake: document add_jar compat shim 

Document the logic that parses for backward compatibility the old
variables that were used to control add_jar prior to named argument
support. In particular, document that the reason this logic exists is
for backward compatibility, and that new features do not need to add to
it.
This commit is contained in:
Matthew Woehlke 2013-06-17 12:26:24 -04:00
parent dc43f7755d
commit b41771dfeb
1 changed files with 7 additions and 0 deletions
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7
Modules/UseJava.cmake
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@ -221,6 +221,13 @@ set(_JAVA_SYMLINK_SCRIPT ${CMAKE_CURRENT_LIST_DIR}/UseJavaSymlinks.cmake)
function(add_jar _TARGET_NAME) function(add_jar _TARGET_NAME)
# In CMake < 2.8.12, add_jar used variables which were set prior to calling
# add_jar for customizing the behavior of add_jar. In order to be backwards
# compatible, check if any of those variables are set, and use them to
# initialize values of the named arguments. (Giving the corresponding named
# argument will override the value set here.)
#
# New features should use named arguments only.
if(DEFINED CMAKE_JAVA_TARGET_VERSION) if(DEFINED CMAKE_JAVA_TARGET_VERSION)
set(_add_jar_VERSION "${CMAKE_JAVA_TARGET_VERSION}") set(_add_jar_VERSION "${CMAKE_JAVA_TARGET_VERSION}")
endif() endif()