On Mon, Nov 28, 2011 at 12:32 PM, Stefano Lattarini <[email protected]> wrote: > tags 10154 notabug > thanks > > On Monday 28 November 2011, Joe Chen wrote: >> Hi, >> > Hi Joe, thanks for the report. > >> I am using automake for compile flex input file. The flex command >> line option --prefix=<STRING> or -P<STRING> works with the direct >> invoking of flex, buy ylwrap gets error all the time for me: >> >> /bin/bash ../build-aux/ylwrap configf_lexer.l lex.yy.c configf_lexer.c >> -- flex --case-insensitive --prefix=configf_yy >> make[4]: *** [configf_lexer.c] Error 1 >> >> >> Is this a known issue? >> > This is not an issue in ylwrap, but rather and usage error. Let's see > again the help screen from ylwrap: > > Usage: ylwrap INPUT [OUTPUT DESIRED]... -- PROGRAM [ARGS]... > > Wrapper for lex/yacc invocations, renaming files as desired. > > INPUT is the input file > OUTPUT is one file PROG generates > DESIRED is the file we actually want instead of OUTPUT > PROGRAM is program to run > ARGS are passed to PROG > > Any number of OUTPUT,DESIRED pairs may be used. > > This suggests that, instead of using `--prefix' to modify the name of > the generated `.c' file, you should simply use the DESIRED argument: > > ylwrap configf_lexer.l lex.yy.c configf_lexer.c \ > -- flex --case-insensitive > > Or, if you have other reasons to want to stick with the `--prefix' > option (whose exact effects and semantics I don't pretend to know), > you must inform `ylwrap' of the different expected OUTPUT filename: > > ylwrap configf_lexer.l lex.configf_yy.c configf_lexer.c \ > -- flex --case-insensitive --prefix=configf_yy
THANKS! This format of ylwrap no longer gets the error, and works for my purpose: > ylwrap configf_lexer.l lex.configf_yy.c configf_lexer.c \> -- flex > --case-insensitive --prefix=configf_yy Could you point to me how to compose my files of "configure.ac" and/or "Makefile.am" to let "ylwrap" takes the exact OUTPUT and DESIRED that I want? Very often, I have multiple pairs of *.y and *.l files to be linked together and this --prefix=<STRING> makes it possible. And thus I have a need to flexibly specify the OUTPUT and DESIRED as needed. BTW, --prefix=<STRING> lets flex to generate "<STRING>text" in place of "yytext" in the generated file. -- Joe ---------------------------------- Joseph Chen
