| Red Hat Enterprise Linux 4: Using the GNU Compiler Collection (GCC) | ||
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[Which additional multibyte characters may appear in identifiers and their correspondence to universal character names (6.4.2).]
[The number of significant initial characters in an identifier (5.2.4.1, 6.4.2).]
For internal names, all characters are significant. For external names, the number of significant characters are defined by the linker; for almost all targets, all characters are significant.