On Tue, 10 Sep 2002, Alexandre Beneteau wrote:
...
> lexer.ll: In member function `virtual int My_lily_lexer::yylex()':
> lexer.ll:227: `cerr' undeclared (first use this function)
> lexer.ll:227: (Each undeclared identifier is reported only once for each
> function it appears in.)
....
>
> Is anybody knowing c++ and flex can give a fix/patch ???
> Thanks in advance,
>
>
I don't know exactly this (f)lex error. But because I
spended some days (and nights) to make my program noteedit
gcc-3.2 compatible I think I know from many problems I had
what's wrong:
In gcc-3.2 you cannot write:
#include <iostream>
main() {
char word[128];
cout << "Say a word >>> ";
cin >> word;
cerr << "the word is " << word << endl;
}
The result is:
$ g++ ctest.cc -o ctest
ctest.cc: In function `int main()':
ctest.cc:5: `cout' undeclared (first use this function)
ctest.cc:5: (Each undeclared identifier is reported only once for each function
it appears in.)
ctest.cc:6: `cin' undeclared (first use this function)
ctest.cc:7: `cerr' undeclared (first use this function)
ctest.cc:7: `endl' undeclared (first use this function)
Correct is either:
#include <iostream>
main() {
char word[128];
std::cout << "Say a word >>> ";
std::cin >> word;
std::cerr << "the word is " << word << std::endl;
}
or:
#include <iostream>
using namespace std;
main() {
char word[128];
cout << "Say a word >>> ";
cin >> word;
cerr << "the word is " << word << endl;
}
------
Furthermore: Some (f)lex' procduce the following declaration:
extern int isatty();
This declaration differs from the declaration in "unistd.h".
This is no problem in C. But the C++ compiler gets
excited over this declaration difference.
I found no other solution than to introduced the following
suffix rule in Makefile:
.ll.cc:
$(LEX) -olex.yy.c $<
sed '/extern *int *isatty/d' lex.yy.c > $@
rm lex.yy.c
--
J.Anders, Chemnitz, GERMANY ([EMAIL PROTECTED])
_______________________________________________
Lilypond-user mailing list
[EMAIL PROTECTED]
http://mail.gnu.org/mailman/listinfo/lilypond-user
