egrep confusion

[Richard Pixley]

I don't understand the result of this command when using gnu egrep
(2.4.2) compiled with gcc-3.0 on sparc-sun-solaris-2.6.  The result
for me is empty, while I'm expecting the line to match.  (That's a
space or tab, btw).

echo '#define S_arpLib_INVALID_ARGUMENT' \
     | /home/rpixley/gnu/src/grep-sendai/src/egrep "^#define[   ]*S_[^A-Z]"

Any obvious clues I'm overlooking?

--rich