Error in lexer.c building on Fedora 18 x86_64

[dkowis]

This is on a fresh pull, it went ahead and built a bison 2.7 for me.

cd c && make
make[1]: Entering directory `/home/dkowis/gitwork/cucumber/bool/c'
flex --version
flex 2.5.36
flex lexer.l
# Remove warnings from lexer.c by injecting a few UNUSED macros with surgical precision.
sed -i'' -e 's/exit( YY_EXIT_FAILURE );/UNUSED(yyscanner);exit( YY_EXIT_FAILURE );/g' lexer.c
sed -i'' -e 's/return (void \*) malloc( size );/UNUSED(yyscanner);return (void *) malloc( size );/g' lexer.c
sed -i'' -e 's/return (void \*) realloc( (char \*) ptr, size );/UNUSED(yyscanner);return (void *) realloc( (char *) ptr, size );/g' lexer.c
sed -i'' -e 's/free( (char \*) ptr );/UNUSED(yyscanner);free( (char *) ptr );/g' lexer.c
# Inject missing initializations into lexer.c with surgical precision.
sed -i'' -e 's/b->yy_fill_buffer = 0;/b->yy_fill_buffer = 0; b->yy_bs_lineno = 1; b->yy_bs_column = 1;/g' lexer.c
bison --version
bison (GNU Bison) 2.7
Written by Robert Corbett and Richard Stallman.

Copyright (C) 2012 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
bison parser.y
cc -fPIC -O2 -Werror -Wall -Wextra   -c -o parser.o parser.c
cc -fPIC -O2 -Werror -Wall -Wextra   -c -o lexer.o lexer.c
lexer.c: In function ‘yylex’:
lexer.c:788:23: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
lexer.c: In function ‘yy_scan_bytes’:
lexer.c:1616:17: error: comparison between signed and unsigned integer expressions [-Werror=sign-compare]
cc1: all warnings being treated as errors
make[1]: *** [lexer.o] Error 1
make[1]: Leaving directory `/home/dkowis/gitwork/cucumber/bool/c'
make: *** [c] Error 2

[aslakhellesoy]

Do you still get warnings with flex 2.5.37?

[dkowis]

I'll have to manually install flex 2.5.37, I'll try to do that this evening.