Re: css.c: No such file or directory when lex lib not found during build

[Darshit Shah]

Hi,

Thanks for reporting this. I think we can modify the configure script to make 
the check on flex a hard error.

I'll do that soon(tm)


On Wed, May 24, 2023, at 11:01, David Cepelik wrote:
> Hi all,
>
> I noticed some strange behavior when building recent wget (fbbdf9ea)
> from sources using recent Flex (d30bdf4) built from sources. I tracked
> the issue down to Flex [1], but I thought that wget's toolchain made the
> problem harder to debug, so I figured it might be a good think to report
> it here as well.
>
> In a nutshell, when lex library is not detected, configure will output
> the following:
>
>     [...]
>     checking for flex... flex
>     checking for lex output file root... lex.yy
>     checking for lex library... not found
>     configure: WARNING: required lex library not found; giving up on flex
>     [...]
>
> which gets drowned in the rest of the output. Even though the library is
> "required" as per the warning above, the build process continues and
> eventually crashes with,
>
>     [...]
>     echo '#include "wget.h"' > css_.c
>     cat css.c >> css_.c
>     cat: css.c: No such file or directory
>     make[3]: *** [Makefile:3156: css_.c] Error 1
>     [...]
>
> This is because LEX defaults to : in src/Makefile:
>
>     [...]
>       CC       convert.o
>       CC       cookies.o
>     :  -ocss.c css.l
>       CC       ftp.o
>       CC       css-url.o
>     [...]
>
> Is this expected?
>
>                                             Best, David
>
> [1] https://github.com/westes/flex/issues/565
> Attachments:
> * signature.asc