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Do not always propagate linker language preference

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The commit "Consider link dependencies for link language" taught CMake
to propagate linker language preference from languages compiled into
libraries linked by a target.  It turns out this should only be done for
some languages, such as C++, because normally the language of the
program entry point (main) should be used.

We introduce variable CMAKE_<LANG>_LINKER_PREFERENCE_PROPAGATES to tell
CMake whether a language should propagate its linker preference across
targets.  Currently it is true only for C++.
This commit is contained in:
Brad King
2009-07-30 10:59:37 -04:00
parent fd633b33cf
commit fcab87c9f8
3 changed files with 40 additions and 15 deletions
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Modules/CMakeCXXCompiler.cmake.in
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@@ -22,6 +22,7 @@ SET(CMAKE_CXX_COMPILER_ID_RUN 1)
SET(CMAKE_CXX_IGNORE_EXTENSIONS inl;h;H;o;O;obj;OBJ;def;DEF;rc;RC)
SET(CMAKE_CXX_SOURCE_FILE_EXTENSIONS C;M;c++;cc;cpp;cxx;m;mm)
SET(CMAKE_CXX_LINKER_PREFERENCE 30)
SET(CMAKE_CXX_LINKER_PREFERENCE_PROPAGATES 1)
# Save compiler ABI information.
SET(CMAKE_CXX_SIZEOF_DATA_PTR "@CMAKE_CXX_SIZEOF_DATA_PTR@")