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* configure.in (enable_c_mbchar): New configure option.
(extra_cpp_objs): Always available now.
* cexp.y (mbchar.h): #include it.
(yylex): Handle Multibyte characters in character literals.
* cccp.c (mbchar.h): #include it.
(main): Set character set based on LANG environment variable.
(rescan): Handle multibyte characters in comments.
(skip_if_group): See above.
(validate_else): See above.
(skip_to_end_of_comment): See above.
(macarg1): See above.
(discard_comments): See above.
(rescan): Handle multibyte characters in string and character literals.
(collect_expansion): See above.
(skip_quoted_string): See above.
(macroexpand): See above.
(macarg1): See above.
(discard_comments): See above.
(change_newlines): See above.
* c-lex.c (mbchar.h): #include it.
(GET_ENVIRONMENT): New macro.
(init_lex): Set character set based on LANG environment variable.
(yylex): Handle multibyte characters in character literals.
(yylex): Handle multibyte characters in string literals.
* Makefile.in (mbchar.o): New target.
(cccp$(exeext)): @extra_cpp_objs@ is always available.
(cppmain$(exeext)): @extra_cpp_objs@ is always available.
* mbchar.[ch]: New files for multibyte character handling.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@21303 138bc75d-0d04-0410-961f-82ee72b054a4
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