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| author | Stephen Kelly <steveire@gmail.com> | 2012-05-30 18:13:09 (GMT) |
|---|---|---|
| committer | Brad King <brad.king@kitware.com> | 2012-06-12 19:38:48 (GMT) |
| commit | bd3496300262bd26073ce03e020731c592249148 (patch) | |
| tree | c5beb67ff16ac1da10ec76aebf8f62fc3a97b75f /Source/cmDocumentVariables.cxx | |
| parent | 55d7aa4c44d78322df76679db768154568e51385 (diff) | |
| download | CMake-bd3496300262bd26073ce03e020731c592249148.zip CMake-bd3496300262bd26073ce03e020731c592249148.tar.gz CMake-bd3496300262bd26073ce03e020731c592249148.tar.bz2 | |
Refactor generation of shared library flags
CMAKE_SHARED_LIBRARY_<lang>_FLAGS has flags on various platforms for a
variety of purposes that are correlated with shared libraries but not
exclusive to them. Refactor generation of these flags to use new
purpose-specific platform variables
CMAKE_<lang>_COMPILE_OPTIONS_DLL
CMAKE_<lang>_COMPILE_OPTIONS_PIC
CMAKE_<lang>_COMPILE_OPTIONS_PIE
Activate the DLL flags specifically for shared libraries. Add a new
POSITION_INDEPENDENT_CODE target property to activate PIC/PIE flags, and
default to true for shared libraries to preserve default behavior.
Initialize the new property from CMAKE_POSITION_INDEPENDENT_CODE to
allow easy global configuration in projects.
Although the default behavior is unchanged by this refactoring, the new
approach ignores CMAKE_SHARED_LIBRARY_<lang>_FLAGS completely. We must
leave it set in case projects reference the value. Furthermore, if a
project modifies CMAKE_SHARED_LIBRARY_<lang>_FLAGS it expects the new
value to be used. Add policy CMP0018 to handle compatibility with
projects that modify this platform variable.
Add a PositionIndependentCode test on platforms where we can get
meaningful results.
Diffstat (limited to 'Source/cmDocumentVariables.cxx')
| -rw-r--r-- | Source/cmDocumentVariables.cxx | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Source/cmDocumentVariables.cxx b/Source/cmDocumentVariables.cxx index 9e33d75..592d931 100644 --- a/Source/cmDocumentVariables.cxx +++ b/Source/cmDocumentVariables.cxx @@ -1350,6 +1350,14 @@ void cmDocumentVariables::DefineVariables(cmake* cm) "See that target property for additional information.", false, "Variables that Control the Build"); + cm->DefineProperty + ("CMAKE_POSITION_INDEPENDENT_FLAGS", cmProperty::VARIABLE, + "Default value for POSITION_INDEPENDENT_CODE of targets.", + "This variable is used to initialize the " + "POSITION_INDEPENDENT_CODE property on all the targets. " + "See that target property for additional information.", + false, + "Variables that Control the Build"); // Variables defined when the a language is enabled These variables will // also be defined whenever CMake has loaded its support for compiling (LANG) |