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+unsupported-compilers
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+---------------------
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+
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+* The implementation of CMake relies on some C++ compiler features which are
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+ not supported by some older compilers. As a result, those old compilers
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+ can no longer be used to build CMake itself. CMake continues to be able to
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+ generate Makefiles and project files for users of those old compilers
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+ however. The compilers known to no longer be capable of building CMake
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+ are:
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+
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+ * MSVC 6 and 7.0 - superceded by VisualStudio 7.1 and newer compilers.
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+ * GCC 2.95 - superceded by GCC 3 and newer compilers.
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+ * Borland compilers - superceded by other Windows compilers.
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+ * Compaq compilers - superceded by other compilers.
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+ * Comeau compilers - superceded by other compilers.
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+ * SGI compilers - IRIX was dropped as a host platform.
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+
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+ When building using SolarisStudio 12, the default ``libCStd`` standard
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+ library is not sufficient to build CMake. The SolarisStudio distribution
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+ supports compiler options to use ``STLPort4`` or ``libstdc++``. An
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+ appropriate option to select the standard library is now added
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+ automatically when building CMake with SolarisStudio compilers.
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Stephen Kelly