[RFC] 9533: fifth iteration

[Danny Smith]

I've been told that this type of define:

+#  define _GLIBCPP_ISREG(x) (S_IFREG & (x))

can cause problems for some systems on which each flag does not have
its own bit

This is the usual way (from gcc/system.h)
#ifndef S_ISREG
#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#endif


Danny

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