c++ - File generating for cmake -

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i have project automake build system , there flex/bison files there. can't understand how include them cmake build system. i'm trying manually. here project tree:

+root |---cmakelists.txt |---sources/ |   |---flex |   |---main |   |---cmakelists.txt |---includes/

in flex folder there 2 files: player_command_parser.ypp; player_command_tok.lpp. these files robocup soccer server.

i don't know how use them new build system decided generate files manually hands:

flex --c++ player_command_tok.lpp

this command generates lex.rcsspcom.cc starts following code:

#line 3 "lex.rcsspcom.cc"  #define  yy_int_aligned short int  /* lexical scanner generated flex */  #define flex_scanner #define yy_flex_major_version 2 #define yy_flex_minor_version 5 #define yy_flex_subminor_version 35 #if yy_flex_subminor_version > 0 #define flex_beta #endif      /* c++ scanner mess. flexlexer.h header file relies on      * following macro. required in order pass c++-multiple-scanners      * test in regression suite. reports breaks inheritance.      * address in future release of flex, or omit c++ scanner      * altogether.      */     #define yyflexlexer rcsspcomflexlexer

the next step is: bison -d player_command_parser.ypp.

i got: player_command_parser.tab.cpp; player_command_parser.tab.hpp

now i'm trying copy generated files related folders: *.tab.hpp -> includes, , added cc&cpp files sources/cmakelists.txt: 

set (flexsources     server/flex/lex.rcsspcom.cc     server/flex/player_command_parser.tab.cpp )

and compile output:

[  1%] building cxx object sources/flex/lex.rcsspcom.cc.o in file included /includes/player_command_tok.h:31:0,                  player_command_tok.lpp:28: /usr/include/flexlexer.h:112:7: error: redefinition of ‘class rcsspcomflexlexer’ /usr/include/flexlexer.h:112:7: error: previous definition of ‘class rcsspcomflexlexer’

what wrong?

your compile error appears due header being included twice. may need make file little more include guard:

player_command_tok_guarded.hpp:

#ifndef player_command_tok_guarded #define player_command_tok_guarded #include "player_command_tok.hpp" #endif

and make files #include new file instead. integrating flex , bison cmake system, try this:

# find flex , bison. find_program(flex flex doc "path flex lexical analyser generator.") if(not ${flex})   message(send_error "flex not found.") endif find_program(bison bison doc "path bison parser generator.") if(not ${bison})   message(send_error "bison not found.") endif  # custom commands invoke flex , bison. add_custom_command(output lex.rcsspcom.cc                    command ${flex} --c++ player_command_tok.lpp                     main_dependency player_command_tok.lpp                    comment "generating lexer"                    verbatim) add_custom_command(output player_command_parser.tab.cpp player_command_parser.tab.hpp                    command ${bison} -d player_command_parser.ypp                    main_dependency player_command_parser.ypp                    comment "generating parser"                    verbatim)

and add files file list usual.


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