7950d17653
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5293 42af7a65-404d-4744-a932-0658087f49c3
43 lines
1.6 KiB
Plaintext
43 lines
1.6 KiB
Plaintext
libxx/README.txt
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^^^^^^^^^^^^^^^^
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This directory contains a fragmentary C++ library that will allow
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to build only the simplest of C++ applications. In the deeply
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embedded world, that is probably all that is necessary. If you
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have a need for more extensive C++ support, the following libraries
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are recommended:
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- libstdc++ (part of GCC)
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- STLport http://www.stlport.org/
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- uClibc++ http://cxx.uclibc.org/
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- uSTL http://ustl.sourceforge.net/
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There is a version of uClibc++ that is customized for NuttX that can
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be found here: misc/uClibc++. See misc/uClibc++ for installation
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instructions.
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At present, only the following are supported here:
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- void *operator new(std::size_t nbytes);
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- void operator delete(void* ptr);
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- void operator delete[](void *ptr);
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- void __cxa_pure_virtual(void);
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- int __aeabi_atexit(void* object, void (*destroyer)(void*), void *dso_handle);
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- int __cxa_atexit(__cxa_exitfunc_t func, FAR void *arg, FAR void *dso_handle);
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operator new
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------------
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This operator should take a type of size_t. But size_t has an unknown underlying
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type. In the nuttx sys/types.h header file, size_t is typed as uint32_t
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(which is determined by architecture-specific logic). But the C++
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compiler may believe that size_t is of a different type resulting in
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compilation errors in the operator. Using the underlying integer type
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instead of size_t seems to resolve the compilation issues. Need to
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REVISIT this.
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Once some C++ compilers, this will cause an error:
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Problem: "'operator new' takes size_t ('...') as first parameter"
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Workaround: Add -fpermissive to the compilation flags
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