[Uml-devel] [Bug 67277] New: Error compiling libclassparser_la.all_cc.cc: "class yyFlexLexer" redefined
Daniel Richard G.
skunk at iskunk.org
Wed Nov 5 00:33:17 UTC 2003
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Summary: Error compiling libclassparser_la.all_cc.cc: "class
Platform: Compiled Sources
AssignedTo: umbrello-devel at kde.org
ReportedBy: skunk at iskunk.org
Version: current CVS (using KDE Devel)
Installed from: Compiled sources
Compiler: gcc 3.3.2 (Debian)
Compiling kdesdk/umbrello/umbrello/classparser/libclassparser_la.all_cc.cc gives the following error:
In file included from ClassParser.h:31,
/usr/include/FlexLexer.h:112: error: redefinition of `class yyFlexLexer'
/usr/include/FlexLexer.h:112: error: previous definition of `class yyFlexLexer'
followed by various others.
The problem is that the FlexLexer.h header has a strange way of handling multiple inclusions of
itself. tokenizer.l (tokenizer.cc) and ClassParser.cc both include this header indirectly, and in separate compilation they work fine; but when compiling concatenated source, a "#define yyFlexLexer yyFlexLexer" declaration (inserted by flex) carries through from tokenizer.cc to ClassParser.cc, and causes havoc on the second inclusion. (In the error message quoted above, the two FlexLexer.h lines are the second and first inclusions, respectively.)
The/A solution is to "#undef yyFlexLexer" at the end of tokenizer.l, and I will attach a patch that does this with an explanation why.
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