patacongo commented on issue #131: Improve config URL: https://github.com/apache/incubator-nuttx/pull/131#issuecomment-578527529 I tried a simple thing would might solve this problem. Currently CONFIGX_CXX_NEWLONG is used only in libs/libnxx: libxx/Kconfig:config CXX_NEWLONG libxx/libxx_deletea_sized.cxx:#ifdef CONFIG_CXX_NEWLONG libxx/libxx_delete_sized.cxx:#ifdef CONFIG_CXX_NEWLONG libxx/libxx_new.cxx:#ifdef CONFIG_CXX_NEWLONG libxx/libxx_newa.cxx:#ifdef CONFIG_CXX_NEWLONG Since that C++ code, it seems like you should be able to implement both the unsigned int and the unsigned long forms. Because of C++ name mangling, there are really different symbols. So tried eliminating CONFIG_CXX_LONG and just duplicating both operators with unsigned int and unsigned long. So, for example, there were two operators like: void operator delete(FAR void *ptr, unsigned long size) void operator delete(FAR void *ptr, unsigned int size) That works for some operators but not for others. I get these compilation errors in that case: CXX: libxx_new_uint.cxx CXX: libxx_new_ulong.cxx libxx_new_ulong.cxx:65:40: warning: 'operator new' takes type 'size_t' ('unsigned int') as first parameter [-fpermissive] void *operator new(unsigned long nbytes) ^ CXX: libxx_newa_uint.cxx CXX: libxx_newa_ulong.cxx libxx_newa_ulong.cxx:73:42: warning: 'operator new' takes type 'size_t' ('unsigned int') as first parameter [-fpermissive] void *operator new[](unsigned long nbytes) ^ I was disappointed that that does not work! I was hoping to resolve this issue this way. The only real solution is to either built the toolchain from scratch using only the NuttX definition of size_t (which depends on the architecture-specific definition of uintptr_t).
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