What version of Bison are you using? Bison just introduced recently C++ support. You need to select the C++ skeleton. See http://www.gnu.org/software/bison/manual/html_mono/bison.html#C_002b_002b-Language-Interface for details or asked The Bison mailing list (help-bison@gnu.org) for help.
> Hello, > > Sorry for offtopic-posting but I wouldn't directly know where to ask > elsewhere... > I'd like to ask this question: in some project I try to switch from C to > C++ , in order to refactor/learn C++ constructs (that is, classes, > inheritance, and such) better > There is this problem: it doesn't link correctly; I get link errors such > like this: > > rm -f lex.yy.cc y.tab.* y.output *.o \ > `find . -name core -o -name \*\.bak` \ > democomp toc \ > test-runs-log > bison --yacc --defines --debug --verbose spascal.y -o y.tab.cc > g++ -Wall -g -ggdb -c y.tab.cc -o y.tab.o > flex --c++ spascal.l > sed -i -e 's/extern "C" int isatty (int );/extern "C" int isatty (int) > throw();/g' lex.yy.cc > g++ -Wall -g -ggdb -c lex.yy.cc -o lex.yy.o > > <snip ... compiling all .cc files using g++ > > > g++ -g -o democomp y.tab.o lex.yy.o debug.o list.o symbol.o syntax.o > parser.o intermediate.o register.o flowgraph.o dag.o optimize.o > inttomips.o mips.o -lfl > y.tab.o(.text+0x46a): In function `yyparse()': > /home/jorishuizer/zooi/coco3-hack/y.tab.cc:1105: undefined reference to > `yylex()' > y.tab.o(.text+0x6dd): In function `yyparse()': > /home/jorishuizer/zooi/coco3-hack/spascal.y:116: undefined reference to > `selectEndOfTable' > <snip ... lots of these > > Symbols in two files are not found: those in symbol.cc and those in > lex.yy.cc (generated with flex) > > does someone have any ideas? > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact > [EMAIL PROTECTED] > > -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
