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dnl --------------------------------------------------------------------------
dnl PA_SYM(prefix, string)
dnl
dnl Convert a (semi-) arbitrary string to a CPP symbol
dnl --------------------------------------------------------------------------
AC_DEFUN([PA_SYM],
[m4_bpatsubsts(m4_quote(m4_toupper([$*])),
[,],[],[[^ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789]+],[_],[^._?\(.*\)_.$],[[\1]])])
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