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gcccygwinldyacclex

cannot find -ll collect2: error: ld returned 1 exit status

I got a similar error when I tried to compile my lex.yy.c file generated from lex helloworld.l using gcc lex.yy.c -ll in cygwin.

The helloworld.l contains

%%
[0-9]+ { printf("saw an integer:%s\n", yytext);}
[a-z]+ { printf("saw a lowercase character:%s\n", yytext);}
[A-Z]+ { printf("saw an uppercase character:%s\n", yytext);}
.|\n ;
%%

The output for gcc lex.yy.c -ll was

/usr/lib/gcc/i686-pc-cygwin/10/../../../../i686-pc-cygwin/bin/ld: cannot find -ll
collect2: error: ld returned 1 exit status

Please help me resolve this error and get this to work. Thank you!

Solution

  • as mentioned by @rici

    $ gcc lex.yy.c -lfl

$ ./a < helloworld.l
saw an integer:0
saw an integer:9
saw a lowercase character:printf
saw a lowercase character:saw
...

    Why ? The program lexbelongs to the flexpackage and the import library is libfl.a

    $ cygcheck -f /usr/bin/lex
flex-2.6.4-2

$ cygcheck -l flex | grep a$
/usr/lib/libfl.a