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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 /Tests/PositionIndependentTargets/pic_test.h | |
| 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 'Tests/PositionIndependentTargets/pic_test.h')
| -rw-r--r-- | Tests/PositionIndependentTargets/pic_test.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/Tests/PositionIndependentTargets/pic_test.h b/Tests/PositionIndependentTargets/pic_test.h new file mode 100644 index 0000000..3f64557 --- /dev/null +++ b/Tests/PositionIndependentTargets/pic_test.h @@ -0,0 +1,20 @@ + +#if defined(__ELF__) +# if !defined(__PIC__) +# error "The POSITION_INDEPENDENT_CODE property should cause __PIC__ to be defined on ELF platforms." +# endif +#endif + +#if defined(PIC_TEST_STATIC_BUILD) +# define PIC_TEST_EXPORT +#else +# if defined(_WIN32) || defined(WIN32) /* Win32 version */ +# ifdef PIC_TEST_BUILD_DLL +# define PIC_TEST_EXPORT __declspec(dllexport) +# else +# define PIC_TEST_EXPORT __declspec(dllimport) +# endif +# else +# define PIC_TEST_EXPORT +# endif +#endif |